Merge pull request #14150 from ncteisen/more-clang-tidy

Remove and Prohibit C Style Casts

177 files changed, 2541 insertions, 2182 deletions

diff --git a/src/core/ext/census/grpc_context.cc b/src/core/ext/census/grpc_context.cc
index ffe7c51ff8..069e8f1486 100644
--- a/src/core/ext/census/grpc_context.cc
+++ b/src/core/ext/census/grpc_context.cc
@@ -31,5 +31,6 @@ void grpc_census_call_set_context(grpc_call* call, census_context* context) {
 
 census_context* grpc_census_call_get_context(grpc_call* call) {
   GRPC_API_TRACE("grpc_census_call_get_context(call=%p)", 1, (call));
-  return (census_context*)grpc_call_context_get(call, GRPC_CONTEXT_TRACING);
+  return static_cast<census_context*>(
+      grpc_call_context_get(call, GRPC_CONTEXT_TRACING));
 }
diff --git a/src/core/ext/filters/client_channel/backup_poller.cc b/src/core/ext/filters/client_channel/backup_poller.cc
index 906a72b662..ee90b499eb 100644
--- a/src/core/ext/filters/client_channel/backup_poller.cc
+++ b/src/core/ext/filters/client_channel/backup_poller.cc
@@ -80,7 +80,7 @@ static void backup_poller_shutdown_unref(backup_poller* p) {
 }
 
 static void done_poller(void* arg, grpc_error* error) {
-  backup_poller_shutdown_unref((backup_poller*)arg);
+  backup_poller_shutdown_unref(static_cast<backup_poller*>(arg));
 }
 
 static void g_poller_unref() {
@@ -102,7 +102,7 @@ static void g_poller_unref() {
 }
 
 static void run_poller(void* arg, grpc_error* error) {
-  backup_poller* p = (backup_poller*)arg;
+  backup_poller* p = static_cast<backup_poller*>(arg);
   if (error != GRPC_ERROR_NONE) {
     if (error != GRPC_ERROR_CANCELLED) {
       GRPC_LOG_IF_ERROR("run_poller", GRPC_ERROR_REF(error));
@@ -133,8 +133,9 @@ void grpc_client_channel_start_backup_polling(
   }
   gpr_mu_lock(&g_poller_mu);
   if (g_poller == nullptr) {
-    g_poller = (backup_poller*)gpr_zalloc(sizeof(backup_poller));
-    g_poller->pollset = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
+    g_poller = static_cast<backup_poller*>(gpr_zalloc(sizeof(backup_poller)));
+    g_poller->pollset =
+        static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
     g_poller->shutting_down = false;
     grpc_pollset_init(g_poller->pollset, &g_poller->pollset_mu);
     gpr_ref_init(&g_poller->refs, 0);
diff --git a/src/core/ext/filters/client_channel/channel_connectivity.cc b/src/core/ext/filters/client_channel/channel_connectivity.cc
index a827aa30ec..31a5c31124 100644
--- a/src/core/ext/filters/client_channel/channel_connectivity.cc
+++ b/src/core/ext/filters/client_channel/channel_connectivity.cc
@@ -89,7 +89,7 @@ static void delete_state_watcher(state_watcher* w) {
 
 static void finished_completion(void* pw, grpc_cq_completion* ignored) {
   bool should_delete = false;
-  state_watcher* w = (state_watcher*)pw;
+  state_watcher* w = static_cast<state_watcher*>(pw);
   gpr_mu_lock(&w->mu);
   switch (w->phase) {
     case WAITING:
@@ -162,11 +162,11 @@ static void partly_done(state_watcher* w, bool due_to_completion,
 }
 
 static void watch_complete(void* pw, grpc_error* error) {
-  partly_done((state_watcher*)pw, true, GRPC_ERROR_REF(error));
+  partly_done(static_cast<state_watcher*>(pw), true, GRPC_ERROR_REF(error));
 }
 
 static void timeout_complete(void* pw, grpc_error* error) {
-  partly_done((state_watcher*)pw, false, GRPC_ERROR_REF(error));
+  partly_done(static_cast<state_watcher*>(pw), false, GRPC_ERROR_REF(error));
 }
 
 int grpc_channel_num_external_connectivity_watchers(grpc_channel* channel) {
@@ -182,7 +182,7 @@ typedef struct watcher_timer_init_arg {
 } watcher_timer_init_arg;
 
 static void watcher_timer_init(void* arg, grpc_error* error_ignored) {
-  watcher_timer_init_arg* wa = (watcher_timer_init_arg*)arg;
+  watcher_timer_init_arg* wa = static_cast<watcher_timer_init_arg*>(arg);
 
   grpc_timer_init(&wa->w->alarm, grpc_timespec_to_millis_round_up(wa->deadline),
                   &wa->w->on_timeout);
@@ -201,7 +201,7 @@ void grpc_channel_watch_connectivity_state(
   grpc_channel_element* client_channel_elem =
       grpc_channel_stack_last_element(grpc_channel_get_channel_stack(channel));
   grpc_core::ExecCtx exec_ctx;
-  state_watcher* w = (state_watcher*)gpr_malloc(sizeof(*w));
+  state_watcher* w = static_cast<state_watcher*>(gpr_malloc(sizeof(*w)));
 
   GRPC_API_TRACE(
       "grpc_channel_watch_connectivity_state("
@@ -227,8 +227,8 @@ void grpc_channel_watch_connectivity_state(
   w->channel = channel;
   w->error = nullptr;
 
-  watcher_timer_init_arg* wa =
-      (watcher_timer_init_arg*)gpr_malloc(sizeof(watcher_timer_init_arg));
+  watcher_timer_init_arg* wa = static_cast<watcher_timer_init_arg*>(
+      gpr_malloc(sizeof(watcher_timer_init_arg)));
   wa->w = w;
   wa->deadline = deadline;
   GRPC_CLOSURE_INIT(&w->watcher_timer_init, watcher_timer_init, wa,
diff --git a/src/core/ext/filters/client_channel/client_channel.cc b/src/core/ext/filters/client_channel/client_channel.cc
index cbee74c22d..50d562f946 100644
--- a/src/core/ext/filters/client_channel/client_channel.cc
+++ b/src/core/ext/filters/client_channel/client_channel.cc
@@ -88,10 +88,10 @@ static void method_parameters_unref(method_parameters* method_params) {
 
 // Wrappers to pass to grpc_service_config_create_method_config_table().
 static void* method_parameters_ref_wrapper(void* value) {
-  return method_parameters_ref((method_parameters*)value);
+  return method_parameters_ref(static_cast<method_parameters*>(value));
 }
 static void method_parameters_unref_wrapper(void* value) {
-  method_parameters_unref((method_parameters*)value);
+  method_parameters_unref(static_cast<method_parameters*>(value));
 }
 
 static bool parse_wait_for_ready(grpc_json* field,
@@ -119,7 +119,7 @@ static bool parse_timeout(grpc_json* field, grpc_millis* timeout) {
       gpr_free(buf);
       return false;
     }
-    int num_digits = (int)strlen(decimal_point + 1);
+    int num_digits = static_cast<int>(strlen(decimal_point + 1));
     if (num_digits > 9) {  // We don't accept greater precision than nanos.
       gpr_free(buf);
       return false;
@@ -149,7 +149,7 @@ static void* method_parameters_create_from_json(const grpc_json* json) {
     }
   }
   method_parameters* value =
-      (method_parameters*)gpr_malloc(sizeof(method_parameters));
+      static_cast<method_parameters*>(gpr_malloc(sizeof(method_parameters)));
   gpr_ref_init(&value->refs, 1);
   value->timeout = timeout;
   value->wait_for_ready = wait_for_ready;
@@ -260,7 +260,8 @@ static void set_channel_connectivity_state_locked(channel_data* chand,
 }
 
 static void on_lb_policy_state_changed_locked(void* arg, grpc_error* error) {
-  lb_policy_connectivity_watcher* w = (lb_policy_connectivity_watcher*)arg;
+  lb_policy_connectivity_watcher* w =
+      static_cast<lb_policy_connectivity_watcher*>(arg);
   /* check if the notification is for the latest policy */
   if (w->lb_policy == w->chand->lb_policy) {
     if (grpc_client_channel_trace.enabled()) {
@@ -281,7 +282,7 @@ static void watch_lb_policy_locked(channel_data* chand,
                                    grpc_lb_policy* lb_policy,
                                    grpc_connectivity_state current_state) {
   lb_policy_connectivity_watcher* w =
-      (lb_policy_connectivity_watcher*)gpr_malloc(sizeof(*w));
+      static_cast<lb_policy_connectivity_watcher*>(gpr_malloc(sizeof(*w)));
   GRPC_CHANNEL_STACK_REF(chand->owning_stack, "watch_lb_policy");
   w->chand = chand;
   GRPC_CLOSURE_INIT(&w->on_changed, on_lb_policy_state_changed_locked, w,
@@ -310,7 +311,7 @@ typedef struct {
 
 static void parse_retry_throttle_params(const grpc_json* field, void* arg) {
   service_config_parsing_state* parsing_state =
-      (service_config_parsing_state*)arg;
+      static_cast<service_config_parsing_state*>(arg);
   if (strcmp(field->key, "retryThrottling") == 0) {
     if (parsing_state->retry_throttle_data != nullptr) return;  // Duplicate.
     if (field->type != GRPC_JSON_OBJECT) return;
@@ -334,7 +335,7 @@ static void parse_retry_throttle_params(const grpc_json* field, void* arg) {
         uint32_t decimal_value = 0;
         const char* decimal_point = strchr(sub_field->value, '.');
         if (decimal_point != nullptr) {
-          whole_len = (size_t)(decimal_point - sub_field->value);
+          whole_len = static_cast<size_t>(decimal_point - sub_field->value);
           multiplier = 1000;
           size_t decimal_len = strlen(decimal_point + 1);
           if (decimal_len > 3) decimal_len = 3;
@@ -353,7 +354,8 @@ static void parse_retry_throttle_params(const grpc_json* field, void* arg) {
                                        &whole_value)) {
           return;
         }
-        milli_token_ratio = (int)((whole_value * multiplier) + decimal_value);
+        milli_token_ratio =
+            static_cast<int>((whole_value * multiplier) + decimal_value);
         if (milli_token_ratio <= 0) return;
       }
     }
@@ -364,7 +366,8 @@ static void parse_retry_throttle_params(const grpc_json* field, void* arg) {
 }
 
 static void request_reresolution_locked(void* arg, grpc_error* error) {
-  reresolution_request_args* args = (reresolution_request_args*)arg;
+  reresolution_request_args* args =
+      static_cast<reresolution_request_args*>(arg);
   channel_data* chand = args->chand;
   // If this invocation is for a stale LB policy, treat it as an LB shutdown
   // signal.
@@ -383,7 +386,7 @@ static void request_reresolution_locked(void* arg, grpc_error* error) {
 }
 
 static void on_resolver_result_changed_locked(void* arg, grpc_error* error) {
-  channel_data* chand = (channel_data*)arg;
+  channel_data* chand = static_cast<channel_data*>(arg);
   if (grpc_client_channel_trace.enabled()) {
     gpr_log(GPR_DEBUG, "chand=%p: got resolver result: error=%s", chand,
             grpc_error_string(error));
@@ -412,7 +415,7 @@ static void on_resolver_result_changed_locked(void* arg, grpc_error* error) {
           grpc_channel_args_find(chand->resolver_result, GRPC_ARG_LB_ADDRESSES);
       if (channel_arg != nullptr && channel_arg->type == GRPC_ARG_POINTER) {
         grpc_lb_addresses* addresses =
-            (grpc_lb_addresses*)channel_arg->value.pointer.p;
+            static_cast<grpc_lb_addresses*>(channel_arg->value.pointer.p);
         bool found_balancer_address = false;
         for (size_t i = 0; i < addresses->num_addresses; ++i) {
           if (addresses->addresses[i].is_balancer) {
@@ -458,7 +461,8 @@ static void on_resolver_result_changed_locked(void* arg, grpc_error* error) {
                   lb_policy_name);
         } else {
           reresolution_request_args* args =
-              (reresolution_request_args*)gpr_zalloc(sizeof(*args));
+              static_cast<reresolution_request_args*>(
+                  gpr_zalloc(sizeof(*args)));
           args->chand = chand;
           args->lb_policy = new_lb_policy;
           GRPC_CLOSURE_INIT(&args->closure, request_reresolution_locked, args,
@@ -610,10 +614,10 @@ static void on_resolver_result_changed_locked(void* arg, grpc_error* error) {
 }
 
 static void start_transport_op_locked(void* arg, grpc_error* error_ignored) {
-  grpc_transport_op* op = (grpc_transport_op*)arg;
+  grpc_transport_op* op = static_cast<grpc_transport_op*>(arg);
   grpc_channel_element* elem =
-      (grpc_channel_element*)op->handler_private.extra_arg;
-  channel_data* chand = (channel_data*)elem->channel_data;
+      static_cast<grpc_channel_element*>(op->handler_private.extra_arg);
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
 
   if (op->on_connectivity_state_change != nullptr) {
     grpc_connectivity_state_notify_on_state_change(
@@ -668,7 +672,7 @@ static void start_transport_op_locked(void* arg, grpc_error* error_ignored) {
 
 static void cc_start_transport_op(grpc_channel_element* elem,
                                   grpc_transport_op* op) {
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
 
   GPR_ASSERT(op->set_accept_stream == false);
   if (op->bind_pollset != nullptr) {
@@ -685,7 +689,7 @@ static void cc_start_transport_op(grpc_channel_element* elem,
 
 static void cc_get_channel_info(grpc_channel_element* elem,
                                 const grpc_channel_info* info) {
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   gpr_mu_lock(&chand->info_mu);
   if (info->lb_policy_name != nullptr) {
     *info->lb_policy_name = chand->info_lb_policy_name == nullptr
@@ -704,7 +708,7 @@ static void cc_get_channel_info(grpc_channel_element* elem,
 /* Constructor for channel_data */
 static grpc_error* cc_init_channel_elem(grpc_channel_element* elem,
                                         grpc_channel_element_args* args) {
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   GPR_ASSERT(args->is_last);
   GPR_ASSERT(elem->filter == &grpc_client_channel_filter);
   // Initialize data members.
@@ -736,9 +740,9 @@ static grpc_error* cc_init_channel_elem(grpc_channel_element* elem,
         "client channel factory arg must be a pointer");
   }
   grpc_client_channel_factory_ref(
-      (grpc_client_channel_factory*)arg->value.pointer.p);
+      static_cast<grpc_client_channel_factory*>(arg->value.pointer.p));
   chand->client_channel_factory =
-      (grpc_client_channel_factory*)arg->value.pointer.p;
+      static_cast<grpc_client_channel_factory*>(arg->value.pointer.p);
   // Get server name to resolve, using proxy mapper if needed.
   arg = grpc_channel_args_find(args->channel_args, GRPC_ARG_SERVER_URI);
   if (arg == nullptr) {
@@ -775,7 +779,7 @@ static void shutdown_resolver_locked(void* arg, grpc_error* error) {
 
 /* Destructor for channel_data */
 static void cc_destroy_channel_elem(grpc_channel_element* elem) {
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   if (chand->resolver != nullptr) {
     GRPC_CLOSURE_SCHED(
         GRPC_CLOSURE_CREATE(shutdown_resolver_locked, chand->resolver.release(),
@@ -867,7 +871,7 @@ typedef struct client_channel_call_data {
 
 grpc_subchannel_call* grpc_client_channel_get_subchannel_call(
     grpc_call_element* elem) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   return calld->subchannel_call;
 }
 
@@ -886,7 +890,7 @@ static void waiting_for_pick_batches_add(
 
 // This is called via the call combiner, so access to calld is synchronized.
 static void fail_pending_batch_in_call_combiner(void* arg, grpc_error* error) {
-  call_data* calld = (call_data*)arg;
+  call_data* calld = static_cast<call_data*>(arg);
   if (calld->waiting_for_pick_batches_count > 0) {
     --calld->waiting_for_pick_batches_count;
     grpc_transport_stream_op_batch_finish_with_failure(
@@ -898,7 +902,7 @@ static void fail_pending_batch_in_call_combiner(void* arg, grpc_error* error) {
 // This is called via the call combiner, so access to calld is synchronized.
 static void waiting_for_pick_batches_fail(grpc_call_element* elem,
                                           grpc_error* error) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (grpc_client_channel_trace.enabled()) {
     gpr_log(GPR_DEBUG,
             "chand=%p calld=%p: failing %" PRIuPTR " pending batches: %s",
@@ -926,7 +930,7 @@ static void waiting_for_pick_batches_fail(grpc_call_element* elem,
 
 // This is called via the call combiner, so access to calld is synchronized.
 static void run_pending_batch_in_call_combiner(void* arg, grpc_error* ignored) {
-  call_data* calld = (call_data*)arg;
+  call_data* calld = static_cast<call_data*>(arg);
   if (calld->waiting_for_pick_batches_count > 0) {
     --calld->waiting_for_pick_batches_count;
     grpc_subchannel_call_process_op(
@@ -937,8 +941,8 @@ static void run_pending_batch_in_call_combiner(void* arg, grpc_error* ignored) {
 
 // This is called via the call combiner, so access to calld is synchronized.
 static void waiting_for_pick_batches_resume(grpc_call_element* elem) {
-  channel_data* chand = (channel_data*)elem->channel_data;
-  call_data* calld = (call_data*)elem->call_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (grpc_client_channel_trace.enabled()) {
     gpr_log(GPR_DEBUG,
             "chand=%p calld=%p: sending %" PRIuPTR
@@ -962,8 +966,8 @@ static void waiting_for_pick_batches_resume(grpc_call_element* elem) {
 // Applies service config to the call.  Must be invoked once we know
 // that the resolver has returned results to the channel.
 static void apply_service_config_to_call_locked(grpc_call_element* elem) {
-  channel_data* chand = (channel_data*)elem->channel_data;
-  call_data* calld = (call_data*)elem->call_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (grpc_client_channel_trace.enabled()) {
     gpr_log(GPR_DEBUG, "chand=%p calld=%p: applying service config to call",
             chand, calld);
@@ -973,8 +977,8 @@ static void apply_service_config_to_call_locked(grpc_call_element* elem) {
         grpc_server_retry_throttle_data_ref(chand->retry_throttle_data);
   }
   if (chand->method_params_table != nullptr) {
-    calld->method_params = (method_parameters*)grpc_method_config_table_get(
-        chand->method_params_table, calld->path);
+    calld->method_params = static_cast<method_parameters*>(
+        grpc_method_config_table_get(chand->method_params_table, calld->path));
     if (calld->method_params != nullptr) {
       method_parameters_ref(calld->method_params);
       // If the deadline from the service config is shorter than the one
@@ -995,8 +999,8 @@ static void apply_service_config_to_call_locked(grpc_call_element* elem) {
 
 static void create_subchannel_call_locked(grpc_call_element* elem,
                                           grpc_error* error) {
-  channel_data* chand = (channel_data*)elem->channel_data;
-  call_data* calld = (call_data*)elem->call_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   const grpc_core::ConnectedSubchannel::CallArgs call_args = {
       calld->pollent,                       // pollent
       calld->path,                          // path
@@ -1023,8 +1027,8 @@ static void create_subchannel_call_locked(grpc_call_element* elem,
 
 // Invoked when a pick is completed, on both success or failure.
 static void pick_done_locked(grpc_call_element* elem, grpc_error* error) {
-  call_data* calld = (call_data*)elem->call_data;
-  channel_data* chand = (channel_data*)elem->channel_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   if (calld->pick.connected_subchannel == nullptr) {
     // Failed to create subchannel.
     GRPC_ERROR_UNREF(calld->error);
@@ -1051,8 +1055,8 @@ static void pick_done_locked(grpc_call_element* elem, grpc_error* error) {
 // pick was done asynchronously.  Removes the call's polling entity from
 // chand->interested_parties before invoking pick_done_locked().
 static void async_pick_done_locked(grpc_call_element* elem, grpc_error* error) {
-  channel_data* chand = (channel_data*)elem->channel_data;
-  call_data* calld = (call_data*)elem->call_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   grpc_polling_entity_del_from_pollset_set(calld->pollent,
                                            chand->interested_parties);
   pick_done_locked(elem, error);
@@ -1061,9 +1065,9 @@ static void async_pick_done_locked(grpc_call_element* elem, grpc_error* error) {
 // Note: This runs under the client_channel combiner, but will NOT be
 // holding the call combiner.
 static void pick_callback_cancel_locked(void* arg, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)arg;
-  channel_data* chand = (channel_data*)elem->channel_data;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(arg);
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   // Note: chand->lb_policy may have changed since we started our pick,
   // in which case we will be cancelling the pick on a policy other than
   // the one we started it on.  However, this will just be a no-op.
@@ -1081,9 +1085,9 @@ static void pick_callback_cancel_locked(void* arg, grpc_error* error) {
 // Callback invoked by grpc_lb_policy_pick_locked() for async picks.
 // Unrefs the LB policy and invokes async_pick_done_locked().
 static void pick_callback_done_locked(void* arg, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)arg;
-  channel_data* chand = (channel_data*)elem->channel_data;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(arg);
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (grpc_client_channel_trace.enabled()) {
     gpr_log(GPR_DEBUG, "chand=%p calld=%p: pick completed asynchronously",
             chand, calld);
@@ -1096,8 +1100,8 @@ static void pick_callback_done_locked(void* arg, grpc_error* error) {
 // If the pick was completed synchronously, unrefs the LB policy and
 // returns true.
 static bool pick_callback_start_locked(grpc_call_element* elem) {
-  channel_data* chand = (channel_data*)elem->channel_data;
-  call_data* calld = (call_data*)elem->call_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (grpc_client_channel_trace.enabled()) {
     gpr_log(GPR_DEBUG, "chand=%p calld=%p: starting pick on lb_policy=%p",
             chand, calld, chand->lb_policy);
@@ -1161,7 +1165,8 @@ typedef struct {
 // holding the call combiner.
 static void pick_after_resolver_result_cancel_locked(void* arg,
                                                      grpc_error* error) {
-  pick_after_resolver_result_args* args = (pick_after_resolver_result_args*)arg;
+  pick_after_resolver_result_args* args =
+      static_cast<pick_after_resolver_result_args*>(arg);
   if (args->finished) {
     gpr_free(args);
     return;
@@ -1175,8 +1180,8 @@ static void pick_after_resolver_result_cancel_locked(void* arg,
   // async_pick_done_locked() to propagate the error back to the caller.
   args->finished = true;
   grpc_call_element* elem = args->elem;
-  channel_data* chand = (channel_data*)elem->channel_data;
-  call_data* calld = (call_data*)elem->call_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (grpc_client_channel_trace.enabled()) {
     gpr_log(GPR_DEBUG,
             "chand=%p calld=%p: cancelling pick waiting for resolver result",
@@ -1195,7 +1200,8 @@ static void pick_after_resolver_result_start_locked(grpc_call_element* elem);
 
 static void pick_after_resolver_result_done_locked(void* arg,
                                                    grpc_error* error) {
-  pick_after_resolver_result_args* args = (pick_after_resolver_result_args*)arg;
+  pick_after_resolver_result_args* args =
+      static_cast<pick_after_resolver_result_args*>(arg);
   if (args->finished) {
     /* cancelled, do nothing */
     if (grpc_client_channel_trace.enabled()) {
@@ -1206,8 +1212,8 @@ static void pick_after_resolver_result_done_locked(void* arg,
   }
   args->finished = true;
   grpc_call_element* elem = args->elem;
-  channel_data* chand = (channel_data*)elem->channel_data;
-  call_data* calld = (call_data*)elem->call_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (error != GRPC_ERROR_NONE) {
     if (grpc_client_channel_trace.enabled()) {
       gpr_log(GPR_DEBUG, "chand=%p calld=%p: resolver failed to return data",
@@ -1255,15 +1261,15 @@ static void pick_after_resolver_result_done_locked(void* arg,
 }
 
 static void pick_after_resolver_result_start_locked(grpc_call_element* elem) {
-  channel_data* chand = (channel_data*)elem->channel_data;
-  call_data* calld = (call_data*)elem->call_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (grpc_client_channel_trace.enabled()) {
     gpr_log(GPR_DEBUG,
             "chand=%p calld=%p: deferring pick pending resolver result", chand,
             calld);
   }
   pick_after_resolver_result_args* args =
-      (pick_after_resolver_result_args*)gpr_zalloc(sizeof(*args));
+      static_cast<pick_after_resolver_result_args*>(gpr_zalloc(sizeof(*args)));
   args->elem = elem;
   GRPC_CLOSURE_INIT(&args->closure, pick_after_resolver_result_done_locked,
                     args, grpc_combiner_scheduler(chand->combiner));
@@ -1277,9 +1283,9 @@ static void pick_after_resolver_result_start_locked(grpc_call_element* elem) {
 }
 
 static void start_pick_locked(void* arg, grpc_error* ignored) {
-  grpc_call_element* elem = (grpc_call_element*)arg;
-  call_data* calld = (call_data*)elem->call_data;
-  channel_data* chand = (channel_data*)elem->channel_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(arg);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   GPR_ASSERT(calld->pick.connected_subchannel == nullptr);
   if (chand->lb_policy != nullptr) {
     // We already have an LB policy, so ask it for a pick.
@@ -1310,8 +1316,8 @@ static void start_pick_locked(void* arg, grpc_error* ignored) {
 }
 
 static void on_complete(void* arg, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)arg;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(arg);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (calld->retry_throttle_data != nullptr) {
     if (error == GRPC_ERROR_NONE) {
       grpc_server_retry_throttle_data_record_success(
@@ -1331,8 +1337,8 @@ static void on_complete(void* arg, grpc_error* error) {
 static void cc_start_transport_stream_op_batch(
     grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
   GPR_TIMER_SCOPE("cc_start_transport_stream_op_batch", 0);
-  call_data* calld = (call_data*)elem->call_data;
-  channel_data* chand = (channel_data*)elem->channel_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   if (chand->deadline_checking_enabled) {
     grpc_deadline_state_client_start_transport_stream_op_batch(elem, batch);
   }
@@ -1419,8 +1425,8 @@ static void cc_start_transport_stream_op_batch(
 /* Constructor for call_data */
 static grpc_error* cc_init_call_elem(grpc_call_element* elem,
                                      const grpc_call_element_args* args) {
-  call_data* calld = (call_data*)elem->call_data;
-  channel_data* chand = (channel_data*)elem->channel_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   // Initialize data members.
   calld->path = grpc_slice_ref_internal(args->path);
   calld->call_start_time = args->start_time;
@@ -1439,8 +1445,8 @@ static grpc_error* cc_init_call_elem(grpc_call_element* elem,
 static void cc_destroy_call_elem(grpc_call_element* elem,
                                  const grpc_call_final_info* final_info,
                                  grpc_closure* then_schedule_closure) {
-  call_data* calld = (call_data*)elem->call_data;
-  channel_data* chand = (channel_data*)elem->channel_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   if (chand->deadline_checking_enabled) {
     grpc_deadline_state_destroy(elem);
   }
@@ -1471,7 +1477,7 @@ static void cc_destroy_call_elem(grpc_call_element* elem,
 
 static void cc_set_pollset_or_pollset_set(grpc_call_element* elem,
                                           grpc_polling_entity* pollent) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   calld->pollent = pollent;
 }
 
@@ -1494,7 +1500,7 @@ const grpc_channel_filter grpc_client_channel_filter = {
 };
 
 static void try_to_connect_locked(void* arg, grpc_error* error_ignored) {
-  channel_data* chand = (channel_data*)arg;
+  channel_data* chand = static_cast<channel_data*>(arg);
   if (chand->lb_policy != nullptr) {
     grpc_lb_policy_exit_idle_locked(chand->lb_policy);
   } else {
@@ -1508,7 +1514,7 @@ static void try_to_connect_locked(void* arg, grpc_error* error_ignored) {
 
 grpc_connectivity_state grpc_client_channel_check_connectivity_state(
     grpc_channel_element* elem, int try_to_connect) {
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   grpc_connectivity_state out =
       grpc_connectivity_state_check(&chand->state_tracker);
   if (out == GRPC_CHANNEL_IDLE && try_to_connect) {
@@ -1579,7 +1585,7 @@ static void external_connectivity_watcher_list_remove(
 
 int grpc_client_channel_num_external_connectivity_watchers(
     grpc_channel_element* elem) {
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   int count = 0;
 
   gpr_mu_lock(&chand->external_connectivity_watcher_list_mu);
@@ -1595,7 +1601,8 @@ int grpc_client_channel_num_external_connectivity_watchers(
 }
 
 static void on_external_watch_complete_locked(void* arg, grpc_error* error) {
-  external_connectivity_watcher* w = (external_connectivity_watcher*)arg;
+  external_connectivity_watcher* w =
+      static_cast<external_connectivity_watcher*>(arg);
   grpc_closure* follow_up = w->on_complete;
   grpc_polling_entity_del_from_pollset_set(&w->pollent,
                                            w->chand->interested_parties);
@@ -1608,7 +1615,8 @@ static void on_external_watch_complete_locked(void* arg, grpc_error* error) {
 
 static void watch_connectivity_state_locked(void* arg,
                                             grpc_error* error_ignored) {
-  external_connectivity_watcher* w = (external_connectivity_watcher*)arg;
+  external_connectivity_watcher* w =
+      static_cast<external_connectivity_watcher*>(arg);
   external_connectivity_watcher* found = nullptr;
   if (w->state != nullptr) {
     external_connectivity_watcher_list_append(w->chand, w);
@@ -1637,9 +1645,9 @@ void grpc_client_channel_watch_connectivity_state(
     grpc_channel_element* elem, grpc_polling_entity pollent,
     grpc_connectivity_state* state, grpc_closure* closure,
     grpc_closure* watcher_timer_init) {
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   external_connectivity_watcher* w =
-      (external_connectivity_watcher*)gpr_zalloc(sizeof(*w));
+      static_cast<external_connectivity_watcher*>(gpr_zalloc(sizeof(*w)));
   w->chand = chand;
   w->pollent = pollent;
   w->on_complete = closure;
diff --git a/src/core/ext/filters/client_channel/client_channel_factory.cc b/src/core/ext/filters/client_channel/client_channel_factory.cc
index 60c95d7dc9..3baf5b31ab 100644
--- a/src/core/ext/filters/client_channel/client_channel_factory.cc
+++ b/src/core/ext/filters/client_channel/client_channel_factory.cc
@@ -39,12 +39,14 @@ grpc_channel* grpc_client_channel_factory_create_channel(
 }
 
 static void* factory_arg_copy(void* factory) {
-  grpc_client_channel_factory_ref((grpc_client_channel_factory*)factory);
+  grpc_client_channel_factory_ref(
+      static_cast<grpc_client_channel_factory*>(factory));
   return factory;
 }
 
 static void factory_arg_destroy(void* factory) {
-  grpc_client_channel_factory_unref((grpc_client_channel_factory*)factory);
+  grpc_client_channel_factory_unref(
+      static_cast<grpc_client_channel_factory*>(factory));
 }
 
 static int factory_arg_cmp(void* factory1, void* factory2) {
diff --git a/src/core/ext/filters/client_channel/client_channel_plugin.cc b/src/core/ext/filters/client_channel/client_channel_plugin.cc
index d756d9cc05..9172fa781c 100644
--- a/src/core/ext/filters/client_channel/client_channel_plugin.cc
+++ b/src/core/ext/filters/client_channel/client_channel_plugin.cc
@@ -36,7 +36,7 @@
 
 static bool append_filter(grpc_channel_stack_builder* builder, void* arg) {
   return grpc_channel_stack_builder_append_filter(
-      builder, (const grpc_channel_filter*)arg, nullptr, nullptr);
+      builder, static_cast<const grpc_channel_filter*>(arg), nullptr, nullptr);
 }
 
 static bool set_default_host_if_unset(grpc_channel_stack_builder* builder,
diff --git a/src/core/ext/filters/client_channel/http_connect_handshaker.cc b/src/core/ext/filters/client_channel/http_connect_handshaker.cc
index 6bfd038887..6bb4cefe73 100644
--- a/src/core/ext/filters/client_channel/http_connect_handshaker.cc
+++ b/src/core/ext/filters/client_channel/http_connect_handshaker.cc
@@ -119,7 +119,8 @@ static void handshake_failed_locked(http_connect_handshaker* handshaker,
 
 // Callback invoked when finished writing HTTP CONNECT request.
 static void on_write_done(void* arg, grpc_error* error) {
-  http_connect_handshaker* handshaker = (http_connect_handshaker*)arg;
+  http_connect_handshaker* handshaker =
+      static_cast<http_connect_handshaker*>(arg);
   gpr_mu_lock(&handshaker->mu);
   if (error != GRPC_ERROR_NONE || handshaker->shutdown) {
     // If the write failed or we're shutting down, clean up and invoke the
@@ -139,7 +140,8 @@ static void on_write_done(void* arg, grpc_error* error) {
 
 // Callback invoked for reading HTTP CONNECT response.
 static void on_read_done(void* arg, grpc_error* error) {
-  http_connect_handshaker* handshaker = (http_connect_handshaker*)arg;
+  http_connect_handshaker* handshaker =
+      static_cast<http_connect_handshaker*>(arg);
   gpr_mu_lock(&handshaker->mu);
   if (error != GRPC_ERROR_NONE || handshaker->shutdown) {
     // If the read failed or we're shutting down, clean up and invoke the
@@ -224,13 +226,15 @@ done:
 //
 
 static void http_connect_handshaker_destroy(grpc_handshaker* handshaker_in) {
-  http_connect_handshaker* handshaker = (http_connect_handshaker*)handshaker_in;
+  http_connect_handshaker* handshaker =
+      reinterpret_cast<http_connect_handshaker*>(handshaker_in);
   http_connect_handshaker_unref(handshaker);
 }
 
 static void http_connect_handshaker_shutdown(grpc_handshaker* handshaker_in,
                                              grpc_error* why) {
-  http_connect_handshaker* handshaker = (http_connect_handshaker*)handshaker_in;
+  http_connect_handshaker* handshaker =
+      reinterpret_cast<http_connect_handshaker*>(handshaker_in);
   gpr_mu_lock(&handshaker->mu);
   if (!handshaker->shutdown) {
     handshaker->shutdown = true;
@@ -244,7 +248,8 @@ static void http_connect_handshaker_shutdown(grpc_handshaker* handshaker_in,
 static void http_connect_handshaker_do_handshake(
     grpc_handshaker* handshaker_in, grpc_tcp_server_acceptor* acceptor,
     grpc_closure* on_handshake_done, grpc_handshaker_args* args) {
-  http_connect_handshaker* handshaker = (http_connect_handshaker*)handshaker_in;
+  http_connect_handshaker* handshaker =
+      reinterpret_cast<http_connect_handshaker*>(handshaker_in);
   // Check for HTTP CONNECT channel arg.
   // If not found, invoke on_handshake_done without doing anything.
   const grpc_arg* arg =
@@ -270,8 +275,8 @@ static void http_connect_handshaker_do_handshake(
     GPR_ASSERT(arg->type == GRPC_ARG_STRING);
     gpr_string_split(arg->value.string, "\n", &header_strings,
                      &num_header_strings);
-    headers = (grpc_http_header*)gpr_malloc(sizeof(grpc_http_header) *
-                                            num_header_strings);
+    headers = static_cast<grpc_http_header*>(
+        gpr_malloc(sizeof(grpc_http_header) * num_header_strings));
     for (size_t i = 0; i < num_header_strings; ++i) {
       char* sep = strchr(header_strings[i], ':');
       if (sep == nullptr) {
@@ -324,7 +329,7 @@ static const grpc_handshaker_vtable http_connect_handshaker_vtable = {
 
 static grpc_handshaker* grpc_http_connect_handshaker_create() {
   http_connect_handshaker* handshaker =
-      (http_connect_handshaker*)gpr_malloc(sizeof(*handshaker));
+      static_cast<http_connect_handshaker*>(gpr_malloc(sizeof(*handshaker)));
   memset(handshaker, 0, sizeof(*handshaker));
   grpc_handshaker_init(&http_connect_handshaker_vtable, &handshaker->base);
   gpr_mu_init(&handshaker->mu);
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/client_load_reporting_filter.cc b/src/core/ext/filters/client_channel/lb_policy/grpclb/client_load_reporting_filter.cc
index d6b759227e..1a3a1f029c 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/client_load_reporting_filter.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/client_load_reporting_filter.cc
@@ -48,7 +48,7 @@ struct call_data {
 }  // namespace
 
 static void on_complete_for_send(void* arg, grpc_error* error) {
-  call_data* calld = (call_data*)arg;
+  call_data* calld = static_cast<call_data*>(arg);
   if (error == GRPC_ERROR_NONE) {
     calld->send_initial_metadata_succeeded = true;
   }
@@ -56,7 +56,7 @@ static void on_complete_for_send(void* arg, grpc_error* error) {
 }
 
 static void recv_initial_metadata_ready(void* arg, grpc_error* error) {
-  call_data* calld = (call_data*)arg;
+  call_data* calld = static_cast<call_data*>(arg);
   if (error == GRPC_ERROR_NONE) {
     calld->recv_initial_metadata_succeeded = true;
   }
@@ -66,13 +66,13 @@ static void recv_initial_metadata_ready(void* arg, grpc_error* error) {
 
 static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   // Get stats object from context and take a ref.
   GPR_ASSERT(args->context != nullptr);
   if (args->context[GRPC_GRPCLB_CLIENT_STATS].value != nullptr) {
-    calld->client_stats = grpc_grpclb_client_stats_ref(
-        (grpc_grpclb_client_stats*)args->context[GRPC_GRPCLB_CLIENT_STATS]
-            .value);
+    calld->client_stats =
+        grpc_grpclb_client_stats_ref(static_cast<grpc_grpclb_client_stats*>(
+            args->context[GRPC_GRPCLB_CLIENT_STATS].value));
     // Record call started.
     grpc_grpclb_client_stats_add_call_started(calld->client_stats);
   }
@@ -82,7 +82,7 @@ static grpc_error* init_call_elem(grpc_call_element* elem,
 static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (calld->client_stats != nullptr) {
     // Record call finished, optionally setting client_failed_to_send and
     // received.
@@ -97,7 +97,7 @@ static void destroy_call_elem(grpc_call_element* elem,
 
 static void start_transport_stream_op_batch(
     grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   GPR_TIMER_SCOPE("clr_start_transport_stream_op_batch", 0);
   if (calld->client_stats != nullptr) {
     // Intercept send_initial_metadata.
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.cc b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.cc
index ac47990478..04bf798267 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb.cc
@@ -320,7 +320,8 @@ static void glb_lb_call_data_ref(glb_lb_call_data* lb_calld,
     const gpr_atm count = gpr_atm_acq_load(&lb_calld->refs.count);
     gpr_log(GPR_DEBUG, "[%s %p] lb_calld %p REF %lu->%lu (%s)",
             grpc_lb_glb_trace.name(), lb_calld->glb_policy, lb_calld,
-            (unsigned long)(count - 1), (unsigned long)count, reason);
+            static_cast<unsigned long>(count - 1),
+            static_cast<unsigned long>(count), reason);
   }
 }
 
@@ -331,7 +332,8 @@ static void glb_lb_call_data_unref(glb_lb_call_data* lb_calld,
     const gpr_atm count = gpr_atm_acq_load(&lb_calld->refs.count);
     gpr_log(GPR_DEBUG, "[%s %p] lb_calld %p UNREF %lu->%lu (%s)",
             grpc_lb_glb_trace.name(), lb_calld->glb_policy, lb_calld,
-            (unsigned long)(count + 1), (unsigned long)count, reason);
+            static_cast<unsigned long>(count + 1),
+            static_cast<unsigned long>(count), reason);
   }
   if (done) {
     GPR_ASSERT(lb_calld->lb_call != nullptr);
@@ -372,7 +374,7 @@ static grpc_error* initial_metadata_add_lb_token(
 }
 
 static void destroy_client_stats(void* arg) {
-  grpc_grpclb_client_stats_unref((grpc_grpclb_client_stats*)arg);
+  grpc_grpclb_client_stats_unref(static_cast<grpc_grpclb_client_stats*>(arg));
 }
 
 static void pending_pick_set_metadata_and_context(pending_pick* pp) {
@@ -408,7 +410,7 @@ static void pending_pick_set_metadata_and_context(pending_pick* pp) {
  * reference to its associated round robin instance. We wrap this closure in
  * order to unref the round robin instance upon its invocation */
 static void pending_pick_complete(void* arg, grpc_error* error) {
-  pending_pick* pp = (pending_pick*)arg;
+  pending_pick* pp = static_cast<pending_pick*>(arg);
   pending_pick_set_metadata_and_context(pp);
   GRPC_CLOSURE_SCHED(pp->original_on_complete, GRPC_ERROR_REF(error));
   gpr_free(pp);
@@ -416,7 +418,7 @@ static void pending_pick_complete(void* arg, grpc_error* error) {
 
 static pending_pick* pending_pick_create(glb_lb_policy* glb_policy,
                                          grpc_lb_policy_pick_state* pick) {
-  pending_pick* pp = (pending_pick*)gpr_zalloc(sizeof(*pp));
+  pending_pick* pp = static_cast<pending_pick*>(gpr_zalloc(sizeof(*pp)));
   pp->pick = pick;
   pp->glb_policy = glb_policy;
   GRPC_CLOSURE_INIT(&pp->on_complete, pending_pick_complete, pp,
@@ -433,7 +435,7 @@ static void pending_pick_add(pending_pick** root, pending_pick* new_pp) {
 
 static void pending_ping_add(pending_ping** root, grpc_closure* on_initiate,
                              grpc_closure* on_ack) {
-  pending_ping* pping = (pending_ping*)gpr_zalloc(sizeof(*pping));
+  pending_ping* pping = static_cast<pending_ping*>(gpr_zalloc(sizeof(*pping)));
   pping->on_initiate = on_initiate;
   pping->on_ack = on_ack;
   pping->next = *root;
@@ -448,7 +450,7 @@ static bool is_server_valid(const grpc_grpclb_server* server, size_t idx,
     if (log) {
       gpr_log(GPR_ERROR,
               "Invalid port '%d' at index %lu of serverlist. Ignoring.",
-              server->port, (unsigned long)idx);
+              server->port, static_cast<unsigned long>(idx));
     }
     return false;
   }
@@ -457,7 +459,7 @@ static bool is_server_valid(const grpc_grpclb_server* server, size_t idx,
       gpr_log(GPR_ERROR,
               "Expected IP to be 4 or 16 bytes, got %d at index %lu of "
               "serverlist. Ignoring",
-              ip->size, (unsigned long)idx);
+              ip->size, static_cast<unsigned long>(idx));
     }
     return false;
   }
@@ -487,19 +489,21 @@ static void parse_server(const grpc_grpclb_server* server,
                          grpc_resolved_address* addr) {
   memset(addr, 0, sizeof(*addr));
   if (server->drop) return;
-  const uint16_t netorder_port = htons((uint16_t)server->port);
+  const uint16_t netorder_port = htons(static_cast<uint16_t>(server->port));
   /* the addresses are given in binary format (a in(6)_addr struct) in
    * server->ip_address.bytes. */
   const grpc_grpclb_ip_address* ip = &server->ip_address;
   if (ip->size == 4) {
     addr->len = sizeof(struct sockaddr_in);
-    struct sockaddr_in* addr4 = (struct sockaddr_in*)&addr->addr;
+    struct sockaddr_in* addr4 =
+        reinterpret_cast<struct sockaddr_in*>(&addr->addr);
     addr4->sin_family = AF_INET;
     memcpy(&addr4->sin_addr, ip->bytes, ip->size);
     addr4->sin_port = netorder_port;
   } else if (ip->size == 16) {
     addr->len = sizeof(struct sockaddr_in6);
-    struct sockaddr_in6* addr6 = (struct sockaddr_in6*)&addr->addr;
+    struct sockaddr_in6* addr6 =
+        reinterpret_cast<struct sockaddr_in6*>(&addr->addr);
     addr6->sin6_family = AF_INET6;
     memcpy(&addr6->sin6_addr, ip->bytes, ip->size);
     addr6->sin6_port = netorder_port;
@@ -684,7 +688,7 @@ static bool pick_from_internal_rr_locked(glb_lb_policy* glb_policy,
         grpc_grpclb_client_stats_ref(glb_policy->lb_calld->client_stats);
   }
   GPR_ASSERT(pp->pick->user_data == nullptr);
-  pp->pick->user_data = (void**)&pp->lb_token;
+  pp->pick->user_data = reinterpret_cast<void**>(&pp->lb_token);
   // Pick via the RR policy.
   bool pick_done = grpc_lb_policy_pick_locked(glb_policy->rr_policy, pp->pick);
   if (pick_done) {
@@ -716,7 +720,8 @@ static grpc_lb_policy_args* lb_policy_args_create(glb_lb_policy* glb_policy) {
     addresses = grpc_lb_addresses_copy(glb_policy->fallback_backend_addresses);
   }
   GPR_ASSERT(addresses != nullptr);
-  grpc_lb_policy_args* args = (grpc_lb_policy_args*)gpr_zalloc(sizeof(*args));
+  grpc_lb_policy_args* args =
+      static_cast<grpc_lb_policy_args*>(gpr_zalloc(sizeof(*args)));
   args->client_channel_factory = glb_policy->cc_factory;
   args->combiner = glb_policy->base.combiner;
   // Replace the LB addresses in the channel args that we pass down to
@@ -823,7 +828,7 @@ static void rr_handover_locked(glb_lb_policy* glb_policy) {
 }
 
 static void on_rr_connectivity_changed_locked(void* arg, grpc_error* error) {
-  glb_lb_policy* glb_policy = (glb_lb_policy*)arg;
+  glb_lb_policy* glb_policy = static_cast<glb_lb_policy*>(arg);
   if (glb_policy->shutting_down) {
     GRPC_LB_POLICY_UNREF(&glb_policy->base, "glb_rr_connectivity_cb");
     return;
@@ -859,8 +864,8 @@ static grpc_slice_hash_table_entry targets_info_entry_create(
 }
 
 static int balancer_name_cmp_fn(void* a, void* b) {
-  const char* a_str = (const char*)a;
-  const char* b_str = (const char*)b;
+  const char* a_str = static_cast<const char*>(a);
+  const char* b_str = static_cast<const char*>(b);
   return strcmp(a_str, b_str);
 }
 
@@ -887,8 +892,8 @@ static grpc_channel_args* build_lb_channel_args(
   grpc_lb_addresses* lb_addresses =
       grpc_lb_addresses_create(num_grpclb_addrs, nullptr);
   grpc_slice_hash_table_entry* targets_info_entries =
-      (grpc_slice_hash_table_entry*)gpr_zalloc(sizeof(*targets_info_entries) *
-                                               num_grpclb_addrs);
+      static_cast<grpc_slice_hash_table_entry*>(
+          gpr_zalloc(sizeof(*targets_info_entries) * num_grpclb_addrs));
 
   size_t lb_addresses_idx = 0;
   for (size_t i = 0; i < addresses->num_addresses; ++i) {
@@ -931,7 +936,7 @@ static grpc_channel_args* build_lb_channel_args(
 }
 
 static void glb_destroy(grpc_lb_policy* pol) {
-  glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
+  glb_lb_policy* glb_policy = reinterpret_cast<glb_lb_policy*>(pol);
   GPR_ASSERT(glb_policy->pending_picks == nullptr);
   GPR_ASSERT(glb_policy->pending_pings == nullptr);
   gpr_free((void*)glb_policy->server_name);
@@ -951,7 +956,7 @@ static void glb_destroy(grpc_lb_policy* pol) {
 
 static void glb_shutdown_locked(grpc_lb_policy* pol,
                                 grpc_lb_policy* new_policy) {
-  glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
+  glb_lb_policy* glb_policy = reinterpret_cast<glb_lb_policy*>(pol);
   grpc_error* error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Channel shutdown");
   glb_policy->shutting_down = true;
   if (glb_policy->lb_calld != nullptr) {
@@ -1027,7 +1032,7 @@ static void glb_shutdown_locked(grpc_lb_policy* pol,
 static void glb_cancel_pick_locked(grpc_lb_policy* pol,
                                    grpc_lb_policy_pick_state* pick,
                                    grpc_error* error) {
-  glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
+  glb_lb_policy* glb_policy = reinterpret_cast<glb_lb_policy*>(pol);
   pending_pick* pp = glb_policy->pending_picks;
   glb_policy->pending_picks = nullptr;
   while (pp != nullptr) {
@@ -1064,7 +1069,7 @@ static void glb_cancel_picks_locked(grpc_lb_policy* pol,
                                     uint32_t initial_metadata_flags_mask,
                                     uint32_t initial_metadata_flags_eq,
                                     grpc_error* error) {
-  glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
+  glb_lb_policy* glb_policy = reinterpret_cast<glb_lb_policy*>(pol);
   pending_pick* pp = glb_policy->pending_picks;
   glb_policy->pending_picks = nullptr;
   while (pp != nullptr) {
@@ -1111,7 +1116,7 @@ static void start_picking_locked(glb_lb_policy* glb_policy) {
 }
 
 static void glb_exit_idle_locked(grpc_lb_policy* pol) {
-  glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
+  glb_lb_policy* glb_policy = reinterpret_cast<glb_lb_policy*>(pol);
   if (!glb_policy->started_picking) {
     start_picking_locked(glb_policy);
   }
@@ -1119,7 +1124,7 @@ static void glb_exit_idle_locked(grpc_lb_policy* pol) {
 
 static int glb_pick_locked(grpc_lb_policy* pol,
                            grpc_lb_policy_pick_state* pick) {
-  glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
+  glb_lb_policy* glb_policy = reinterpret_cast<glb_lb_policy*>(pol);
   pending_pick* pp = pending_pick_create(glb_policy, pick);
   bool pick_done = false;
   if (glb_policy->rr_policy != nullptr) {
@@ -1165,14 +1170,14 @@ static int glb_pick_locked(grpc_lb_policy* pol,
 
 static grpc_connectivity_state glb_check_connectivity_locked(
     grpc_lb_policy* pol, grpc_error** connectivity_error) {
-  glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
+  glb_lb_policy* glb_policy = reinterpret_cast<glb_lb_policy*>(pol);
   return grpc_connectivity_state_get(&glb_policy->state_tracker,
                                      connectivity_error);
 }
 
 static void glb_ping_one_locked(grpc_lb_policy* pol, grpc_closure* on_initiate,
                                 grpc_closure* on_ack) {
-  glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
+  glb_lb_policy* glb_policy = reinterpret_cast<glb_lb_policy*>(pol);
   if (glb_policy->rr_policy) {
     grpc_lb_policy_ping_one_locked(glb_policy->rr_policy, on_initiate, on_ack);
   } else {
@@ -1186,13 +1191,13 @@ static void glb_ping_one_locked(grpc_lb_policy* pol, grpc_closure* on_initiate,
 static void glb_notify_on_state_change_locked(grpc_lb_policy* pol,
                                               grpc_connectivity_state* current,
                                               grpc_closure* notify) {
-  glb_lb_policy* glb_policy = (glb_lb_policy*)pol;
+  glb_lb_policy* glb_policy = reinterpret_cast<glb_lb_policy*>(pol);
   grpc_connectivity_state_notify_on_state_change(&glb_policy->state_tracker,
                                                  current, notify);
 }
 
 static void lb_call_on_retry_timer_locked(void* arg, grpc_error* error) {
-  glb_lb_policy* glb_policy = (glb_lb_policy*)arg;
+  glb_lb_policy* glb_policy = static_cast<glb_lb_policy*>(arg);
   glb_policy->retry_timer_callback_pending = false;
   if (!glb_policy->shutting_down && error == GRPC_ERROR_NONE &&
       glb_policy->lb_calld == nullptr) {
@@ -1244,7 +1249,7 @@ static void schedule_next_client_load_report(glb_lb_call_data* lb_calld) {
 }
 
 static void client_load_report_done_locked(void* arg, grpc_error* error) {
-  glb_lb_call_data* lb_calld = (glb_lb_call_data*)arg;
+  glb_lb_call_data* lb_calld = static_cast<glb_lb_call_data*>(arg);
   glb_lb_policy* glb_policy = lb_calld->glb_policy;
   grpc_byte_buffer_destroy(lb_calld->send_message_payload);
   lb_calld->send_message_payload = nullptr;
@@ -1257,8 +1262,8 @@ static void client_load_report_done_locked(void* arg, grpc_error* error) {
 
 static bool load_report_counters_are_zero(grpc_grpclb_request* request) {
   grpc_grpclb_dropped_call_counts* drop_entries =
-      (grpc_grpclb_dropped_call_counts*)
-          request->client_stats.calls_finished_with_drop.arg;
+      static_cast<grpc_grpclb_dropped_call_counts*>(
+          request->client_stats.calls_finished_with_drop.arg);
   return request->client_stats.num_calls_started == 0 &&
          request->client_stats.num_calls_finished == 0 &&
          request->client_stats.num_calls_finished_with_client_failed_to_send ==
@@ -1307,7 +1312,7 @@ static void send_client_load_report_locked(glb_lb_call_data* lb_calld) {
 }
 
 static void maybe_send_client_load_report_locked(void* arg, grpc_error* error) {
-  glb_lb_call_data* lb_calld = (glb_lb_call_data*)arg;
+  glb_lb_call_data* lb_calld = static_cast<glb_lb_call_data*>(arg);
   glb_lb_policy* glb_policy = lb_calld->glb_policy;
   lb_calld->client_load_report_timer_callback_pending = false;
   if (error != GRPC_ERROR_NONE || lb_calld != glb_policy->lb_calld) {
@@ -1339,7 +1344,8 @@ static glb_lb_call_data* lb_call_data_create_locked(glb_lb_policy* glb_policy) {
       glb_policy->lb_call_timeout_ms == 0
           ? GRPC_MILLIS_INF_FUTURE
           : grpc_core::ExecCtx::Get()->Now() + glb_policy->lb_call_timeout_ms;
-  glb_lb_call_data* lb_calld = (glb_lb_call_data*)gpr_zalloc(sizeof(*lb_calld));
+  glb_lb_call_data* lb_calld =
+      static_cast<glb_lb_call_data*>(gpr_zalloc(sizeof(*lb_calld)));
   lb_calld->lb_call = grpc_channel_create_pollset_set_call(
       glb_policy->lb_channel, nullptr, GRPC_PROPAGATE_DEFAULTS,
       glb_policy->base.interested_parties,
@@ -1413,7 +1419,7 @@ static void query_for_backends_locked(glb_lb_policy* glb_policy) {
   glb_lb_call_data_ref(glb_policy->lb_calld,
                        "lb_on_sent_initial_request_locked");
   call_error = grpc_call_start_batch_and_execute(
-      glb_policy->lb_calld->lb_call, ops, (size_t)(op - ops),
+      glb_policy->lb_calld->lb_call, ops, static_cast<size_t>(op - ops),
       &glb_policy->lb_calld->lb_on_sent_initial_request);
   GPR_ASSERT(GRPC_CALL_OK == call_error);
   // Op: recv initial metadata.
@@ -1433,7 +1439,7 @@ static void query_for_backends_locked(glb_lb_policy* glb_policy) {
   op++;
   glb_lb_call_data_ref(glb_policy->lb_calld, "lb_on_response_received_locked");
   call_error = grpc_call_start_batch_and_execute(
-      glb_policy->lb_calld->lb_call, ops, (size_t)(op - ops),
+      glb_policy->lb_calld->lb_call, ops, static_cast<size_t>(op - ops),
       &glb_policy->lb_calld->lb_on_response_received);
   GPR_ASSERT(GRPC_CALL_OK == call_error);
   // Op: recv server status.
@@ -1451,13 +1457,13 @@ static void query_for_backends_locked(glb_lb_policy* glb_policy) {
   // ref instead of a new ref. When it's invoked, it's the initial ref that is
   // unreffed.
   call_error = grpc_call_start_batch_and_execute(
-      glb_policy->lb_calld->lb_call, ops, (size_t)(op - ops),
+      glb_policy->lb_calld->lb_call, ops, static_cast<size_t>(op - ops),
       &glb_policy->lb_calld->lb_on_server_status_received);
   GPR_ASSERT(GRPC_CALL_OK == call_error);
 }
 
 static void lb_on_sent_initial_request_locked(void* arg, grpc_error* error) {
-  glb_lb_call_data* lb_calld = (glb_lb_call_data*)arg;
+  glb_lb_call_data* lb_calld = static_cast<glb_lb_call_data*>(arg);
   grpc_byte_buffer_destroy(lb_calld->send_message_payload);
   lb_calld->send_message_payload = nullptr;
   // If we attempted to send a client load report before the initial request was
@@ -1471,7 +1477,7 @@ static void lb_on_sent_initial_request_locked(void* arg, grpc_error* error) {
 }
 
 static void lb_on_response_received_locked(void* arg, grpc_error* error) {
-  glb_lb_call_data* lb_calld = (glb_lb_call_data*)arg;
+  glb_lb_call_data* lb_calld = static_cast<glb_lb_call_data*>(arg);
   glb_lb_policy* glb_policy = lb_calld->glb_policy;
   // Empty payload means the LB call was cancelled.
   if (lb_calld != glb_policy->lb_calld ||
@@ -1594,7 +1600,7 @@ static void lb_on_response_received_locked(void* arg, grpc_error* error) {
     // Reuse the "lb_on_response_received_locked" ref taken in
     // query_for_backends_locked().
     const grpc_call_error call_error = grpc_call_start_batch_and_execute(
-        lb_calld->lb_call, ops, (size_t)(op - ops),
+        lb_calld->lb_call, ops, static_cast<size_t>(op - ops),
         &lb_calld->lb_on_response_received);
     GPR_ASSERT(GRPC_CALL_OK == call_error);
   } else {
@@ -1604,7 +1610,7 @@ static void lb_on_response_received_locked(void* arg, grpc_error* error) {
 }
 
 static void lb_on_server_status_received_locked(void* arg, grpc_error* error) {
-  glb_lb_call_data* lb_calld = (glb_lb_call_data*)arg;
+  glb_lb_call_data* lb_calld = static_cast<glb_lb_call_data*>(arg);
   glb_lb_policy* glb_policy = lb_calld->glb_policy;
   GPR_ASSERT(lb_calld->lb_call != nullptr);
   if (grpc_lb_glb_trace.enabled()) {
@@ -1641,7 +1647,7 @@ static void lb_on_server_status_received_locked(void* arg, grpc_error* error) {
 }
 
 static void lb_on_fallback_timer_locked(void* arg, grpc_error* error) {
-  glb_lb_policy* glb_policy = (glb_lb_policy*)arg;
+  glb_lb_policy* glb_policy = static_cast<glb_lb_policy*>(arg);
   glb_policy->fallback_timer_callback_pending = false;
   /* If we receive a serverlist after the timer fires but before this callback
    * actually runs, don't fall back. */
@@ -1673,7 +1679,7 @@ static void fallback_update_locked(glb_lb_policy* glb_policy,
 
 static void glb_update_locked(grpc_lb_policy* policy,
                               const grpc_lb_policy_args* args) {
-  glb_lb_policy* glb_policy = (glb_lb_policy*)policy;
+  glb_lb_policy* glb_policy = reinterpret_cast<glb_lb_policy*>(policy);
   const grpc_arg* arg =
       grpc_channel_args_find(args->args, GRPC_ARG_LB_ADDRESSES);
   if (arg == nullptr || arg->type != GRPC_ARG_POINTER) {
@@ -1694,7 +1700,7 @@ static void glb_update_locked(grpc_lb_policy* policy,
     return;
   }
   const grpc_lb_addresses* addresses =
-      (const grpc_lb_addresses*)arg->value.pointer.p;
+      static_cast<const grpc_lb_addresses*>(arg->value.pointer.p);
   // If a non-empty serverlist hasn't been received from the balancer,
   // propagate the update to fallback_backend_addresses.
   if (glb_policy->serverlist == nullptr) {
@@ -1731,7 +1737,7 @@ static void glb_update_locked(grpc_lb_policy* policy,
 // stayed READY throughout the update (for example if the update is identical).
 static void glb_lb_channel_on_connectivity_changed_cb(void* arg,
                                                       grpc_error* error) {
-  glb_lb_policy* glb_policy = (glb_lb_policy*)arg;
+  glb_lb_policy* glb_policy = static_cast<glb_lb_policy*>(arg);
   if (glb_policy->shutting_down) goto done;
   // Re-initialize the lb_call. This should also take care of updating the
   // embedded RR policy. Note that the current RR policy, if any, will stay in
@@ -1777,7 +1783,7 @@ static void glb_lb_channel_on_connectivity_changed_cb(void* arg,
 
 static void glb_set_reresolve_closure_locked(
     grpc_lb_policy* policy, grpc_closure* request_reresolution) {
-  glb_lb_policy* glb_policy = (glb_lb_policy*)policy;
+  glb_lb_policy* glb_policy = reinterpret_cast<glb_lb_policy*>(policy);
   GPR_ASSERT(!glb_policy->shutting_down);
   GPR_ASSERT(glb_policy->base.request_reresolution == nullptr);
   if (glb_policy->rr_policy != nullptr) {
@@ -1810,14 +1816,16 @@ static grpc_lb_policy* glb_create(grpc_lb_policy_factory* factory,
   if (arg == nullptr || arg->type != GRPC_ARG_POINTER) {
     return nullptr;
   }
-  grpc_lb_addresses* addresses = (grpc_lb_addresses*)arg->value.pointer.p;
+  grpc_lb_addresses* addresses =
+      static_cast<grpc_lb_addresses*>(arg->value.pointer.p);
   size_t num_grpclb_addrs = 0;
   for (size_t i = 0; i < addresses->num_addresses; ++i) {
     if (addresses->addresses[i].is_balancer) ++num_grpclb_addrs;
   }
   if (num_grpclb_addrs == 0) return nullptr;
 
-  glb_lb_policy* glb_policy = (glb_lb_policy*)gpr_zalloc(sizeof(*glb_policy));
+  glb_lb_policy* glb_policy =
+      static_cast<glb_lb_policy*>(gpr_zalloc(sizeof(*glb_policy)));
 
   /* Get server name. */
   arg = grpc_channel_args_find(args->args, GRPC_ARG_SERVER_URI);
@@ -1921,7 +1929,8 @@ static bool maybe_add_client_load_reporting_filter(
   if (channel_arg != nullptr && channel_arg->type == GRPC_ARG_STRING &&
       strcmp(channel_arg->value.string, "grpclb") == 0) {
     return grpc_channel_stack_builder_append_filter(
-        builder, (const grpc_channel_filter*)arg, nullptr, nullptr);
+        builder, static_cast<const grpc_channel_filter*>(arg), nullptr,
+        nullptr);
   }
   return true;
 }
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_client_stats.cc b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_client_stats.cc
index 45c9f17301..0b5a798be3 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_client_stats.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_client_stats.cc
@@ -42,7 +42,7 @@ struct grpc_grpclb_client_stats {
 
 grpc_grpclb_client_stats* grpc_grpclb_client_stats_create() {
   grpc_grpclb_client_stats* client_stats =
-      (grpc_grpclb_client_stats*)gpr_zalloc(sizeof(*client_stats));
+      static_cast<grpc_grpclb_client_stats*>(gpr_zalloc(sizeof(*client_stats)));
   gpr_ref_init(&client_stats->refs, 1);
   return client_stats;
 }
@@ -88,8 +88,8 @@ void grpc_grpclb_client_stats_add_call_dropped_locked(
   // Record the drop.
   if (client_stats->drop_token_counts == nullptr) {
     client_stats->drop_token_counts =
-        (grpc_grpclb_dropped_call_counts*)gpr_zalloc(
-            sizeof(grpc_grpclb_dropped_call_counts));
+        static_cast<grpc_grpclb_dropped_call_counts*>(
+            gpr_zalloc(sizeof(grpc_grpclb_dropped_call_counts)));
   }
   grpc_grpclb_dropped_call_counts* drop_token_counts =
       client_stats->drop_token_counts;
@@ -104,9 +104,9 @@ void grpc_grpclb_client_stats_add_call_dropped_locked(
   while (new_num_entries < drop_token_counts->num_entries + 1) {
     new_num_entries *= 2;
   }
-  drop_token_counts->token_counts = (grpc_grpclb_drop_token_count*)gpr_realloc(
-      drop_token_counts->token_counts,
-      new_num_entries * sizeof(grpc_grpclb_drop_token_count));
+  drop_token_counts->token_counts = static_cast<grpc_grpclb_drop_token_count*>(
+      gpr_realloc(drop_token_counts->token_counts,
+                  new_num_entries * sizeof(grpc_grpclb_drop_token_count)));
   grpc_grpclb_drop_token_count* new_entry =
       &drop_token_counts->token_counts[drop_token_counts->num_entries++];
   new_entry->token = gpr_strdup(token);
@@ -114,7 +114,7 @@ void grpc_grpclb_client_stats_add_call_dropped_locked(
 }
 
 static void atomic_get_and_reset_counter(int64_t* value, gpr_atm* counter) {
-  *value = (int64_t)gpr_atm_acq_load(counter);
+  *value = static_cast<int64_t>(gpr_atm_acq_load(counter));
   gpr_atm_full_fetch_add(counter, (gpr_atm)(-*value));
 }
 
diff --git a/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.cc b/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.cc
index fc781da330..c388b6ba77 100644
--- a/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.cc
@@ -25,7 +25,7 @@
 /* invoked once for every Server in ServerList */
 static bool count_serverlist(pb_istream_t* stream, const pb_field_t* field,
                              void** arg) {
-  grpc_grpclb_serverlist* sl = (grpc_grpclb_serverlist*)*arg;
+  grpc_grpclb_serverlist* sl = static_cast<grpc_grpclb_serverlist*>(*arg);
   grpc_grpclb_server server;
   if (!pb_decode(stream, grpc_lb_v1_Server_fields, &server)) {
     gpr_log(GPR_ERROR, "nanopb error: %s", PB_GET_ERROR(stream));
@@ -46,10 +46,10 @@ typedef struct decode_serverlist_arg {
 /* invoked once for every Server in ServerList */
 static bool decode_serverlist(pb_istream_t* stream, const pb_field_t* field,
                               void** arg) {
-  decode_serverlist_arg* dec_arg = (decode_serverlist_arg*)*arg;
+  decode_serverlist_arg* dec_arg = static_cast<decode_serverlist_arg*>(*arg);
   GPR_ASSERT(dec_arg->serverlist->num_servers >= dec_arg->decoding_idx);
   grpc_grpclb_server* server =
-      (grpc_grpclb_server*)gpr_zalloc(sizeof(grpc_grpclb_server));
+      static_cast<grpc_grpclb_server*>(gpr_zalloc(sizeof(grpc_grpclb_server)));
   if (!pb_decode(stream, grpc_lb_v1_Server_fields, server)) {
     gpr_free(server);
     gpr_log(GPR_ERROR, "nanopb error: %s", PB_GET_ERROR(stream));
@@ -60,8 +60,8 @@ static bool decode_serverlist(pb_istream_t* stream, const pb_field_t* field,
 }
 
 grpc_grpclb_request* grpc_grpclb_request_create(const char* lb_service_name) {
-  grpc_grpclb_request* req =
-      (grpc_grpclb_request*)gpr_malloc(sizeof(grpc_grpclb_request));
+  grpc_grpclb_request* req = static_cast<grpc_grpclb_request*>(
+      gpr_malloc(sizeof(grpc_grpclb_request)));
   req->has_client_stats = false;
   req->has_initial_request = true;
   req->initial_request.has_name = true;
@@ -80,15 +80,15 @@ static void populate_timestamp(gpr_timespec timestamp,
 
 static bool encode_string(pb_ostream_t* stream, const pb_field_t* field,
                           void* const* arg) {
-  char* str = (char*)*arg;
+  char* str = static_cast<char*>(*arg);
   if (!pb_encode_tag_for_field(stream, field)) return false;
-  return pb_encode_string(stream, (uint8_t*)str, strlen(str));
+  return pb_encode_string(stream, reinterpret_cast<uint8_t*>(str), strlen(str));
 }
 
 static bool encode_drops(pb_ostream_t* stream, const pb_field_t* field,
                          void* const* arg) {
   grpc_grpclb_dropped_call_counts* drop_entries =
-      (grpc_grpclb_dropped_call_counts*)*arg;
+      static_cast<grpc_grpclb_dropped_call_counts*>(*arg);
   if (drop_entries == nullptr) return true;
   for (size_t i = 0; i < drop_entries->num_entries; ++i) {
     if (!pb_encode_tag_for_field(stream, field)) return false;
@@ -107,8 +107,8 @@ static bool encode_drops(pb_ostream_t* stream, const pb_field_t* field,
 
 grpc_grpclb_request* grpc_grpclb_load_report_request_create_locked(
     grpc_grpclb_client_stats* client_stats) {
-  grpc_grpclb_request* req =
-      (grpc_grpclb_request*)gpr_zalloc(sizeof(grpc_grpclb_request));
+  grpc_grpclb_request* req = static_cast<grpc_grpclb_request*>(
+      gpr_zalloc(sizeof(grpc_grpclb_request)));
   req->has_client_stats = true;
   req->client_stats.has_timestamp = true;
   populate_timestamp(gpr_now(GPR_CLOCK_REALTIME), &req->client_stats.timestamp);
@@ -123,8 +123,8 @@ grpc_grpclb_request* grpc_grpclb_load_report_request_create_locked(
       &req->client_stats.num_calls_finished,
       &req->client_stats.num_calls_finished_with_client_failed_to_send,
       &req->client_stats.num_calls_finished_known_received,
-      (grpc_grpclb_dropped_call_counts**)&req->client_stats
-          .calls_finished_with_drop.arg);
+      reinterpret_cast<grpc_grpclb_dropped_call_counts**>(
+          &req->client_stats.calls_finished_with_drop.arg));
   return req;
 }
 
@@ -148,8 +148,8 @@ grpc_slice grpc_grpclb_request_encode(const grpc_grpclb_request* request) {
 void grpc_grpclb_request_destroy(grpc_grpclb_request* request) {
   if (request->has_client_stats) {
     grpc_grpclb_dropped_call_counts* drop_entries =
-        (grpc_grpclb_dropped_call_counts*)
-            request->client_stats.calls_finished_with_drop.arg;
+        static_cast<grpc_grpclb_dropped_call_counts*>(
+            request->client_stats.calls_finished_with_drop.arg);
     grpc_grpclb_dropped_call_counts_destroy(drop_entries);
   }
   gpr_free(request);
@@ -171,8 +171,8 @@ grpc_grpclb_initial_response* grpc_grpclb_initial_response_parse(
   if (!res.has_initial_response) return nullptr;
 
   grpc_grpclb_initial_response* initial_res =
-      (grpc_grpclb_initial_response*)gpr_malloc(
-          sizeof(grpc_grpclb_initial_response));
+      static_cast<grpc_grpclb_initial_response*>(
+          gpr_malloc(sizeof(grpc_grpclb_initial_response)));
   memcpy(initial_res, &res.initial_response,
          sizeof(grpc_grpclb_initial_response));
 
@@ -185,8 +185,8 @@ grpc_grpclb_serverlist* grpc_grpclb_response_parse_serverlist(
       pb_istream_from_buffer(GRPC_SLICE_START_PTR(encoded_grpc_grpclb_response),
                              GRPC_SLICE_LENGTH(encoded_grpc_grpclb_response));
   pb_istream_t stream_at_start = stream;
-  grpc_grpclb_serverlist* sl =
-      (grpc_grpclb_serverlist*)gpr_zalloc(sizeof(grpc_grpclb_serverlist));
+  grpc_grpclb_serverlist* sl = static_cast<grpc_grpclb_serverlist*>(
+      gpr_zalloc(sizeof(grpc_grpclb_serverlist)));
   grpc_grpclb_response res;
   memset(&res, 0, sizeof(grpc_grpclb_response));
   // First pass: count number of servers.
@@ -200,8 +200,8 @@ grpc_grpclb_serverlist* grpc_grpclb_response_parse_serverlist(
   }
   // Second pass: populate servers.
   if (sl->num_servers > 0) {
-    sl->servers = (grpc_grpclb_server**)gpr_zalloc(sizeof(grpc_grpclb_server*) *
-                                                   sl->num_servers);
+    sl->servers = static_cast<grpc_grpclb_server**>(
+        gpr_zalloc(sizeof(grpc_grpclb_server*) * sl->num_servers));
     decode_serverlist_arg decode_arg;
     memset(&decode_arg, 0, sizeof(decode_arg));
     decode_arg.serverlist = sl;
@@ -231,14 +231,14 @@ void grpc_grpclb_destroy_serverlist(grpc_grpclb_serverlist* serverlist) {
 
 grpc_grpclb_serverlist* grpc_grpclb_serverlist_copy(
     const grpc_grpclb_serverlist* sl) {
-  grpc_grpclb_serverlist* copy =
-      (grpc_grpclb_serverlist*)gpr_zalloc(sizeof(grpc_grpclb_serverlist));
+  grpc_grpclb_serverlist* copy = static_cast<grpc_grpclb_serverlist*>(
+      gpr_zalloc(sizeof(grpc_grpclb_serverlist)));
   copy->num_servers = sl->num_servers;
-  copy->servers = (grpc_grpclb_server**)gpr_malloc(sizeof(grpc_grpclb_server*) *
-                                                   sl->num_servers);
+  copy->servers = static_cast<grpc_grpclb_server**>(
+      gpr_malloc(sizeof(grpc_grpclb_server*) * sl->num_servers));
   for (size_t i = 0; i < sl->num_servers; i++) {
-    copy->servers[i] =
-        (grpc_grpclb_server*)gpr_malloc(sizeof(grpc_grpclb_server));
+    copy->servers[i] = static_cast<grpc_grpclb_server*>(
+        gpr_malloc(sizeof(grpc_grpclb_server)));
     memcpy(copy->servers[i], sl->servers[i], sizeof(grpc_grpclb_server));
   }
   return copy;
@@ -291,7 +291,7 @@ int grpc_grpclb_duration_compare(const grpc_grpclb_duration* lhs,
 }
 
 grpc_millis grpc_grpclb_duration_to_millis(grpc_grpclb_duration* duration_pb) {
-  return (grpc_millis)(
+  return static_cast<grpc_millis>(
       (duration_pb->has_seconds ? duration_pb->seconds : 0) * GPR_MS_PER_SEC +
       (duration_pb->has_nanos ? duration_pb->nanos : 0) / GPR_NS_PER_MS);
 }
diff --git a/src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc b/src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc
index 725b78d478..1485f7caf5 100644
--- a/src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc
@@ -51,7 +51,7 @@ typedef struct {
 } pick_first_lb_policy;
 
 static void pf_destroy(grpc_lb_policy* pol) {
-  pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
+  pick_first_lb_policy* p = reinterpret_cast<pick_first_lb_policy*>(pol);
   GPR_ASSERT(p->subchannel_list == nullptr);
   GPR_ASSERT(p->latest_pending_subchannel_list == nullptr);
   GPR_ASSERT(p->pending_picks == nullptr);
@@ -65,7 +65,7 @@ static void pf_destroy(grpc_lb_policy* pol) {
 
 static void pf_shutdown_locked(grpc_lb_policy* pol,
                                grpc_lb_policy* new_policy) {
-  pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
+  pick_first_lb_policy* p = reinterpret_cast<pick_first_lb_policy*>(pol);
   grpc_error* error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Channel shutdown");
   if (grpc_lb_pick_first_trace.enabled()) {
     gpr_log(GPR_DEBUG, "Pick First %p Shutting down", p);
@@ -105,7 +105,7 @@ static void pf_shutdown_locked(grpc_lb_policy* pol,
 static void pf_cancel_pick_locked(grpc_lb_policy* pol,
                                   grpc_lb_policy_pick_state* pick,
                                   grpc_error* error) {
-  pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
+  pick_first_lb_policy* p = reinterpret_cast<pick_first_lb_policy*>(pol);
   grpc_lb_policy_pick_state* pp = p->pending_picks;
   p->pending_picks = nullptr;
   while (pp != nullptr) {
@@ -128,7 +128,7 @@ static void pf_cancel_picks_locked(grpc_lb_policy* pol,
                                    uint32_t initial_metadata_flags_mask,
                                    uint32_t initial_metadata_flags_eq,
                                    grpc_error* error) {
-  pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
+  pick_first_lb_policy* p = reinterpret_cast<pick_first_lb_policy*>(pol);
   grpc_lb_policy_pick_state* pick = p->pending_picks;
   p->pending_picks = nullptr;
   while (pick != nullptr) {
@@ -165,7 +165,7 @@ static void start_picking_locked(pick_first_lb_policy* p) {
 }
 
 static void pf_exit_idle_locked(grpc_lb_policy* pol) {
-  pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
+  pick_first_lb_policy* p = reinterpret_cast<pick_first_lb_policy*>(pol);
   if (!p->started_picking) {
     start_picking_locked(p);
   }
@@ -173,7 +173,7 @@ static void pf_exit_idle_locked(grpc_lb_policy* pol) {
 
 static int pf_pick_locked(grpc_lb_policy* pol,
                           grpc_lb_policy_pick_state* pick) {
-  pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
+  pick_first_lb_policy* p = reinterpret_cast<pick_first_lb_policy*>(pol);
   // If we have a selected subchannel already, return synchronously.
   if (p->selected != nullptr) {
     pick->connected_subchannel = p->selected->connected_subchannel;
@@ -200,21 +200,21 @@ static void destroy_unselected_subchannels_locked(pick_first_lb_policy* p) {
 
 static grpc_connectivity_state pf_check_connectivity_locked(
     grpc_lb_policy* pol, grpc_error** error) {
-  pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
+  pick_first_lb_policy* p = reinterpret_cast<pick_first_lb_policy*>(pol);
   return grpc_connectivity_state_get(&p->state_tracker, error);
 }
 
 static void pf_notify_on_state_change_locked(grpc_lb_policy* pol,
                                              grpc_connectivity_state* current,
                                              grpc_closure* notify) {
-  pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
+  pick_first_lb_policy* p = reinterpret_cast<pick_first_lb_policy*>(pol);
   grpc_connectivity_state_notify_on_state_change(&p->state_tracker, current,
                                                  notify);
 }
 
 static void pf_ping_one_locked(grpc_lb_policy* pol, grpc_closure* on_initiate,
                                grpc_closure* on_ack) {
-  pick_first_lb_policy* p = (pick_first_lb_policy*)pol;
+  pick_first_lb_policy* p = reinterpret_cast<pick_first_lb_policy*>(pol);
   if (p->selected) {
     p->selected->connected_subchannel->Ping(on_initiate, on_ack);
   } else {
@@ -229,7 +229,7 @@ static void pf_connectivity_changed_locked(void* arg, grpc_error* error);
 
 static void pf_update_locked(grpc_lb_policy* policy,
                              const grpc_lb_policy_args* args) {
-  pick_first_lb_policy* p = (pick_first_lb_policy*)policy;
+  pick_first_lb_policy* p = reinterpret_cast<pick_first_lb_policy*>(policy);
   const grpc_arg* arg =
       grpc_channel_args_find(args->args, GRPC_ARG_LB_ADDRESSES);
   if (arg == nullptr || arg->type != GRPC_ARG_POINTER) {
@@ -249,10 +249,10 @@ static void pf_update_locked(grpc_lb_policy* policy,
     return;
   }
   const grpc_lb_addresses* addresses =
-      (const grpc_lb_addresses*)arg->value.pointer.p;
+      static_cast<const grpc_lb_addresses*>(arg->value.pointer.p);
   if (grpc_lb_pick_first_trace.enabled()) {
     gpr_log(GPR_INFO, "Pick First %p received update with %lu addresses",
-            (void*)p, (unsigned long)addresses->num_addresses);
+            (void*)p, static_cast<unsigned long>(addresses->num_addresses));
   }
   grpc_lb_subchannel_list* subchannel_list = grpc_lb_subchannel_list_create(
       &p->base, &grpc_lb_pick_first_trace, addresses, args,
@@ -347,8 +347,9 @@ static void pf_update_locked(grpc_lb_policy* policy,
 }
 
 static void pf_connectivity_changed_locked(void* arg, grpc_error* error) {
-  grpc_lb_subchannel_data* sd = (grpc_lb_subchannel_data*)arg;
-  pick_first_lb_policy* p = (pick_first_lb_policy*)sd->subchannel_list->policy;
+  grpc_lb_subchannel_data* sd = static_cast<grpc_lb_subchannel_data*>(arg);
+  pick_first_lb_policy* p =
+      reinterpret_cast<pick_first_lb_policy*>(sd->subchannel_list->policy);
   if (grpc_lb_pick_first_trace.enabled()) {
     gpr_log(GPR_DEBUG,
             "Pick First %p connectivity changed for subchannel %p (%" PRIuPTR
@@ -521,7 +522,7 @@ static void pf_connectivity_changed_locked(void* arg, grpc_error* error) {
 
 static void pf_set_reresolve_closure_locked(
     grpc_lb_policy* policy, grpc_closure* request_reresolution) {
-  pick_first_lb_policy* p = (pick_first_lb_policy*)policy;
+  pick_first_lb_policy* p = reinterpret_cast<pick_first_lb_policy*>(policy);
   GPR_ASSERT(!p->shutdown);
   GPR_ASSERT(policy->request_reresolution == nullptr);
   policy->request_reresolution = request_reresolution;
@@ -547,7 +548,8 @@ static void pick_first_factory_unref(grpc_lb_policy_factory* factory) {}
 static grpc_lb_policy* create_pick_first(grpc_lb_policy_factory* factory,
                                          grpc_lb_policy_args* args) {
   GPR_ASSERT(args->client_channel_factory != nullptr);
-  pick_first_lb_policy* p = (pick_first_lb_policy*)gpr_zalloc(sizeof(*p));
+  pick_first_lb_policy* p =
+      static_cast<pick_first_lb_policy*>(gpr_zalloc(sizeof(*p)));
   if (grpc_lb_pick_first_trace.enabled()) {
     gpr_log(GPR_DEBUG, "Pick First %p created.", (void*)p);
   }
diff --git a/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.cc b/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.cc
index 6d0485f395..cefd0d8d7d 100644
--- a/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/round_robin/round_robin.cc
@@ -82,8 +82,9 @@ static size_t get_next_ready_subchannel_index_locked(
     gpr_log(GPR_INFO,
             "[RR %p] getting next ready subchannel (out of %lu), "
             "last_ready_subchannel_index=%lu",
-            (void*)p, (unsigned long)p->subchannel_list->num_subchannels,
-            (unsigned long)p->last_ready_subchannel_index);
+            (void*)p,
+            static_cast<unsigned long>(p->subchannel_list->num_subchannels),
+            static_cast<unsigned long>(p->last_ready_subchannel_index));
   }
   for (size_t i = 0; i < p->subchannel_list->num_subchannels; ++i) {
     const size_t index = (i + p->last_ready_subchannel_index + 1) %
@@ -94,7 +95,7 @@ static size_t get_next_ready_subchannel_index_locked(
           "[RR %p] checking subchannel %p, subchannel_list %p, index %lu: "
           "state=%s",
           (void*)p, (void*)p->subchannel_list->subchannels[index].subchannel,
-          (void*)p->subchannel_list, (unsigned long)index,
+          (void*)p->subchannel_list, static_cast<unsigned long>(index),
           grpc_connectivity_state_name(
               p->subchannel_list->subchannels[index].curr_connectivity_state));
     }
@@ -106,7 +107,7 @@ static size_t get_next_ready_subchannel_index_locked(
                 "subchannel_list %p",
                 (void*)p,
                 (void*)p->subchannel_list->subchannels[index].subchannel,
-                (unsigned long)index, (void*)p->subchannel_list);
+                static_cast<unsigned long>(index), (void*)p->subchannel_list);
       }
       return index;
     }
@@ -125,7 +126,7 @@ static void update_last_ready_subchannel_index_locked(round_robin_lb_policy* p,
   if (grpc_lb_round_robin_trace.enabled()) {
     gpr_log(GPR_DEBUG,
             "[RR %p] setting last_ready_subchannel_index=%lu (SC %p, CSC %p)",
-            (void*)p, (unsigned long)last_ready_index,
+            (void*)p, static_cast<unsigned long>(last_ready_index),
             (void*)p->subchannel_list->subchannels[last_ready_index].subchannel,
             (void*)p->subchannel_list->subchannels[last_ready_index]
                 .connected_subchannel.get());
@@ -133,7 +134,7 @@ static void update_last_ready_subchannel_index_locked(round_robin_lb_policy* p,
 }
 
 static void rr_destroy(grpc_lb_policy* pol) {
-  round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
+  round_robin_lb_policy* p = reinterpret_cast<round_robin_lb_policy*>(pol);
   if (grpc_lb_round_robin_trace.enabled()) {
     gpr_log(GPR_DEBUG, "[RR %p] Destroying Round Robin policy at %p",
             (void*)pol, (void*)pol);
@@ -147,7 +148,7 @@ static void rr_destroy(grpc_lb_policy* pol) {
 
 static void rr_shutdown_locked(grpc_lb_policy* pol,
                                grpc_lb_policy* new_policy) {
-  round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
+  round_robin_lb_policy* p = reinterpret_cast<round_robin_lb_policy*>(pol);
   grpc_error* error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Channel shutdown");
   if (grpc_lb_round_robin_trace.enabled()) {
     gpr_log(GPR_DEBUG, "[RR %p] Shutting down", p);
@@ -187,7 +188,7 @@ static void rr_shutdown_locked(grpc_lb_policy* pol,
 static void rr_cancel_pick_locked(grpc_lb_policy* pol,
                                   grpc_lb_policy_pick_state* pick,
                                   grpc_error* error) {
-  round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
+  round_robin_lb_policy* p = reinterpret_cast<round_robin_lb_policy*>(pol);
   grpc_lb_policy_pick_state* pp = p->pending_picks;
   p->pending_picks = nullptr;
   while (pp != nullptr) {
@@ -210,7 +211,7 @@ static void rr_cancel_picks_locked(grpc_lb_policy* pol,
                                    uint32_t initial_metadata_flags_mask,
                                    uint32_t initial_metadata_flags_eq,
                                    grpc_error* error) {
-  round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
+  round_robin_lb_policy* p = reinterpret_cast<round_robin_lb_policy*>(pol);
   grpc_lb_policy_pick_state* pick = p->pending_picks;
   p->pending_picks = nullptr;
   while (pick != nullptr) {
@@ -243,7 +244,7 @@ static void start_picking_locked(round_robin_lb_policy* p) {
 }
 
 static void rr_exit_idle_locked(grpc_lb_policy* pol) {
-  round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
+  round_robin_lb_policy* p = reinterpret_cast<round_robin_lb_policy*>(pol);
   if (!p->started_picking) {
     start_picking_locked(p);
   }
@@ -251,7 +252,7 @@ static void rr_exit_idle_locked(grpc_lb_policy* pol) {
 
 static int rr_pick_locked(grpc_lb_policy* pol,
                           grpc_lb_policy_pick_state* pick) {
-  round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
+  round_robin_lb_policy* p = reinterpret_cast<round_robin_lb_policy*>(pol);
   if (grpc_lb_round_robin_trace.enabled()) {
     gpr_log(GPR_INFO, "[RR %p] Trying to pick (shutdown: %d)", pol,
             p->shutdown);
@@ -334,7 +335,8 @@ static void update_lb_connectivity_status_locked(grpc_lb_subchannel_data* sd,
    *           subchannel_list->num_subchannels.
    */
   grpc_lb_subchannel_list* subchannel_list = sd->subchannel_list;
-  round_robin_lb_policy* p = (round_robin_lb_policy*)subchannel_list->policy;
+  round_robin_lb_policy* p =
+      reinterpret_cast<round_robin_lb_policy*>(subchannel_list->policy);
   GPR_ASSERT(sd->curr_connectivity_state != GRPC_CHANNEL_IDLE);
   if (subchannel_list->num_ready > 0) {
     /* 1) READY */
@@ -355,9 +357,9 @@ static void update_lb_connectivity_status_locked(grpc_lb_subchannel_data* sd,
 }
 
 static void rr_connectivity_changed_locked(void* arg, grpc_error* error) {
-  grpc_lb_subchannel_data* sd = (grpc_lb_subchannel_data*)arg;
+  grpc_lb_subchannel_data* sd = static_cast<grpc_lb_subchannel_data*>(arg);
   round_robin_lb_policy* p =
-      (round_robin_lb_policy*)sd->subchannel_list->policy;
+      reinterpret_cast<round_robin_lb_policy*>(sd->subchannel_list->policy);
   if (grpc_lb_round_robin_trace.enabled()) {
     gpr_log(
         GPR_DEBUG,
@@ -426,7 +428,8 @@ static void rr_connectivity_changed_locked(void* arg, grpc_error* error) {
         if (grpc_lb_round_robin_trace.enabled()) {
           const unsigned long num_subchannels =
               p->subchannel_list != nullptr
-                  ? (unsigned long)p->subchannel_list->num_subchannels
+                  ? static_cast<unsigned long>(
+                        p->subchannel_list->num_subchannels)
                   : 0;
           gpr_log(GPR_DEBUG,
                   "[RR %p] phasing out subchannel list %p (size %lu) in favor "
@@ -467,7 +470,8 @@ static void rr_connectivity_changed_locked(void* arg, grpc_error* error) {
                   "[RR %p] Fulfilling pending pick. Target <-- subchannel %p "
                   "(subchannel_list %p, index %lu)",
                   (void*)p, (void*)selected->subchannel,
-                  (void*)p->subchannel_list, (unsigned long)next_ready_index);
+                  (void*)p->subchannel_list,
+                  static_cast<unsigned long>(next_ready_index));
         }
         GRPC_CLOSURE_SCHED(pick->on_complete, GRPC_ERROR_NONE);
       }
@@ -490,21 +494,21 @@ static void rr_connectivity_changed_locked(void* arg, grpc_error* error) {
 
 static grpc_connectivity_state rr_check_connectivity_locked(
     grpc_lb_policy* pol, grpc_error** error) {
-  round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
+  round_robin_lb_policy* p = reinterpret_cast<round_robin_lb_policy*>(pol);
   return grpc_connectivity_state_get(&p->state_tracker, error);
 }
 
 static void rr_notify_on_state_change_locked(grpc_lb_policy* pol,
                                              grpc_connectivity_state* current,
                                              grpc_closure* notify) {
-  round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
+  round_robin_lb_policy* p = reinterpret_cast<round_robin_lb_policy*>(pol);
   grpc_connectivity_state_notify_on_state_change(&p->state_tracker, current,
                                                  notify);
 }
 
 static void rr_ping_one_locked(grpc_lb_policy* pol, grpc_closure* on_initiate,
                                grpc_closure* on_ack) {
-  round_robin_lb_policy* p = (round_robin_lb_policy*)pol;
+  round_robin_lb_policy* p = reinterpret_cast<round_robin_lb_policy*>(pol);
   const size_t next_ready_index = get_next_ready_subchannel_index_locked(p);
   if (next_ready_index < p->subchannel_list->num_subchannels) {
     grpc_lb_subchannel_data* selected =
@@ -522,7 +526,7 @@ static void rr_ping_one_locked(grpc_lb_policy* pol, grpc_closure* on_initiate,
 
 static void rr_update_locked(grpc_lb_policy* policy,
                              const grpc_lb_policy_args* args) {
-  round_robin_lb_policy* p = (round_robin_lb_policy*)policy;
+  round_robin_lb_policy* p = reinterpret_cast<round_robin_lb_policy*>(policy);
   const grpc_arg* arg =
       grpc_channel_args_find(args->args, GRPC_ARG_LB_ADDRESSES);
   if (arg == nullptr || arg->type != GRPC_ARG_POINTER) {
@@ -537,7 +541,8 @@ static void rr_update_locked(grpc_lb_policy* policy,
     }
     return;
   }
-  grpc_lb_addresses* addresses = (grpc_lb_addresses*)arg->value.pointer.p;
+  grpc_lb_addresses* addresses =
+      static_cast<grpc_lb_addresses*>(arg->value.pointer.p);
   if (grpc_lb_round_robin_trace.enabled()) {
     gpr_log(GPR_DEBUG, "[RR %p] received update with %" PRIuPTR " addresses", p,
             addresses->num_addresses);
@@ -617,7 +622,7 @@ static void rr_update_locked(grpc_lb_policy* policy,
 
 static void rr_set_reresolve_closure_locked(
     grpc_lb_policy* policy, grpc_closure* request_reresolution) {
-  round_robin_lb_policy* p = (round_robin_lb_policy*)policy;
+  round_robin_lb_policy* p = reinterpret_cast<round_robin_lb_policy*>(policy);
   GPR_ASSERT(!p->shutdown);
   GPR_ASSERT(policy->request_reresolution == nullptr);
   policy->request_reresolution = request_reresolution;
@@ -643,7 +648,8 @@ static void round_robin_factory_unref(grpc_lb_policy_factory* factory) {}
 static grpc_lb_policy* round_robin_create(grpc_lb_policy_factory* factory,
                                           grpc_lb_policy_args* args) {
   GPR_ASSERT(args->client_channel_factory != nullptr);
-  round_robin_lb_policy* p = (round_robin_lb_policy*)gpr_zalloc(sizeof(*p));
+  round_robin_lb_policy* p =
+      static_cast<round_robin_lb_policy*>(gpr_zalloc(sizeof(*p)));
   grpc_lb_policy_init(&p->base, &round_robin_lb_policy_vtable, args->combiner);
   grpc_subchannel_index_ref();
   grpc_connectivity_state_init(&p->state_tracker, GRPC_CHANNEL_IDLE,
@@ -651,7 +657,7 @@ static grpc_lb_policy* round_robin_create(grpc_lb_policy_factory* factory,
   rr_update_locked(&p->base, args);
   if (grpc_lb_round_robin_trace.enabled()) {
     gpr_log(GPR_DEBUG, "[RR %p] Created with %lu subchannels", (void*)p,
-            (unsigned long)p->subchannel_list->num_subchannels);
+            static_cast<unsigned long>(p->subchannel_list->num_subchannels));
   }
   return &p->base;
 }
diff --git a/src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc b/src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc
index 75f7ca2d12..e35c5e8db3 100644
--- a/src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc
+++ b/src/core/ext/filters/client_channel/lb_policy/subchannel_list.cc
@@ -37,7 +37,7 @@ void grpc_lb_subchannel_data_unref_subchannel(grpc_lb_subchannel_data* sd,
               " (subchannel %p): unreffing subchannel",
               sd->subchannel_list->tracer->name(), sd->subchannel_list->policy,
               sd->subchannel_list,
-              (size_t)(sd - sd->subchannel_list->subchannels),
+              static_cast<size_t>(sd - sd->subchannel_list->subchannels),
               sd->subchannel_list->num_subchannels, sd->subchannel);
     }
     GRPC_SUBCHANNEL_UNREF(sd->subchannel, reason);
@@ -60,7 +60,8 @@ void grpc_lb_subchannel_data_start_connectivity_watch(
         " (subchannel %p): requesting connectivity change "
         "notification (from %s)",
         sd->subchannel_list->tracer->name(), sd->subchannel_list->policy,
-        sd->subchannel_list, (size_t)(sd - sd->subchannel_list->subchannels),
+        sd->subchannel_list,
+        static_cast<size_t>(sd - sd->subchannel_list->subchannels),
         sd->subchannel_list->num_subchannels, sd->subchannel,
         grpc_connectivity_state_name(sd->pending_connectivity_state_unsafe));
   }
@@ -79,7 +80,7 @@ void grpc_lb_subchannel_data_stop_connectivity_watch(
             " (subchannel %p): stopping connectivity watch",
             sd->subchannel_list->tracer->name(), sd->subchannel_list->policy,
             sd->subchannel_list,
-            (size_t)(sd - sd->subchannel_list->subchannels),
+            static_cast<size_t>(sd - sd->subchannel_list->subchannels),
             sd->subchannel_list->num_subchannels, sd->subchannel);
   }
   GPR_ASSERT(sd->connectivity_notification_pending);
@@ -91,7 +92,8 @@ grpc_lb_subchannel_list* grpc_lb_subchannel_list_create(
     const grpc_lb_addresses* addresses, const grpc_lb_policy_args* args,
     grpc_iomgr_cb_func connectivity_changed_cb) {
   grpc_lb_subchannel_list* subchannel_list =
-      (grpc_lb_subchannel_list*)gpr_zalloc(sizeof(*subchannel_list));
+      static_cast<grpc_lb_subchannel_list*>(
+          gpr_zalloc(sizeof(*subchannel_list)));
   if (tracer->enabled()) {
     gpr_log(GPR_DEBUG,
             "[%s %p] Creating subchannel list %p for %" PRIuPTR " subchannels",
@@ -100,8 +102,8 @@ grpc_lb_subchannel_list* grpc_lb_subchannel_list_create(
   subchannel_list->policy = p;
   subchannel_list->tracer = tracer;
   gpr_ref_init(&subchannel_list->refcount, 1);
-  subchannel_list->subchannels = (grpc_lb_subchannel_data*)gpr_zalloc(
-      sizeof(grpc_lb_subchannel_data) * addresses->num_addresses);
+  subchannel_list->subchannels = static_cast<grpc_lb_subchannel_data*>(
+      gpr_zalloc(sizeof(grpc_lb_subchannel_data) * addresses->num_addresses));
   // We need to remove the LB addresses in order to be able to compare the
   // subchannel keys of subchannels from a different batch of addresses.
   static const char* keys_to_remove[] = {GRPC_ARG_SUBCHANNEL_ADDRESS,
@@ -190,8 +192,8 @@ void grpc_lb_subchannel_list_ref(grpc_lb_subchannel_list* subchannel_list,
     const gpr_atm count = gpr_atm_acq_load(&subchannel_list->refcount.count);
     gpr_log(GPR_DEBUG, "[%s %p] subchannel_list %p REF %lu->%lu (%s)",
             subchannel_list->tracer->name(), subchannel_list->policy,
-            subchannel_list, (unsigned long)(count - 1), (unsigned long)count,
-            reason);
+            subchannel_list, static_cast<unsigned long>(count - 1),
+            static_cast<unsigned long>(count), reason);
   }
 }
 
@@ -202,8 +204,8 @@ void grpc_lb_subchannel_list_unref(grpc_lb_subchannel_list* subchannel_list,
     const gpr_atm count = gpr_atm_acq_load(&subchannel_list->refcount.count);
     gpr_log(GPR_DEBUG, "[%s %p] subchannel_list %p UNREF %lu->%lu (%s)",
             subchannel_list->tracer->name(), subchannel_list->policy,
-            subchannel_list, (unsigned long)(count + 1), (unsigned long)count,
-            reason);
+            subchannel_list, static_cast<unsigned long>(count + 1),
+            static_cast<unsigned long>(count), reason);
   }
   if (done) {
     subchannel_list_destroy(subchannel_list);
@@ -230,7 +232,7 @@ static void subchannel_data_cancel_connectivity_watch(
             " (subchannel %p): canceling connectivity watch (%s)",
             sd->subchannel_list->tracer->name(), sd->subchannel_list->policy,
             sd->subchannel_list,
-            (size_t)(sd - sd->subchannel_list->subchannels),
+            static_cast<size_t>(sd - sd->subchannel_list->subchannels),
             sd->subchannel_list->num_subchannels, sd->subchannel, reason);
   }
   grpc_subchannel_notify_on_state_change(sd->subchannel, nullptr, nullptr,
diff --git a/src/core/ext/filters/client_channel/lb_policy_factory.cc b/src/core/ext/filters/client_channel/lb_policy_factory.cc
index dbf69fdcba..f2a800b221 100644
--- a/src/core/ext/filters/client_channel/lb_policy_factory.cc
+++ b/src/core/ext/filters/client_channel/lb_policy_factory.cc
@@ -29,11 +29,12 @@
 grpc_lb_addresses* grpc_lb_addresses_create(
     size_t num_addresses, const grpc_lb_user_data_vtable* user_data_vtable) {
   grpc_lb_addresses* addresses =
-      (grpc_lb_addresses*)gpr_zalloc(sizeof(grpc_lb_addresses));
+      static_cast<grpc_lb_addresses*>(gpr_zalloc(sizeof(grpc_lb_addresses)));
   addresses->num_addresses = num_addresses;
   addresses->user_data_vtable = user_data_vtable;
   const size_t addresses_size = sizeof(grpc_lb_address) * num_addresses;
-  addresses->addresses = (grpc_lb_address*)gpr_zalloc(addresses_size);
+  addresses->addresses =
+      static_cast<grpc_lb_address*>(gpr_zalloc(addresses_size));
   return addresses;
 }
 
@@ -124,14 +125,14 @@ void grpc_lb_addresses_destroy(grpc_lb_addresses* addresses) {
 }
 
 static void* lb_addresses_copy(void* addresses) {
-  return grpc_lb_addresses_copy((grpc_lb_addresses*)addresses);
+  return grpc_lb_addresses_copy(static_cast<grpc_lb_addresses*>(addresses));
 }
 static void lb_addresses_destroy(void* addresses) {
-  grpc_lb_addresses_destroy((grpc_lb_addresses*)addresses);
+  grpc_lb_addresses_destroy(static_cast<grpc_lb_addresses*>(addresses));
 }
 static int lb_addresses_cmp(void* addresses1, void* addresses2) {
-  return grpc_lb_addresses_cmp((grpc_lb_addresses*)addresses1,
-                               (grpc_lb_addresses*)addresses2);
+  return grpc_lb_addresses_cmp(static_cast<grpc_lb_addresses*>(addresses1),
+                               static_cast<grpc_lb_addresses*>(addresses2));
 }
 static const grpc_arg_pointer_vtable lb_addresses_arg_vtable = {
     lb_addresses_copy, lb_addresses_destroy, lb_addresses_cmp};
@@ -148,7 +149,7 @@ grpc_lb_addresses* grpc_lb_addresses_find_channel_arg(
       grpc_channel_args_find(channel_args, GRPC_ARG_LB_ADDRESSES);
   if (lb_addresses_arg == nullptr || lb_addresses_arg->type != GRPC_ARG_POINTER)
     return nullptr;
-  return (grpc_lb_addresses*)lb_addresses_arg->value.pointer.p;
+  return static_cast<grpc_lb_addresses*>(lb_addresses_arg->value.pointer.p);
 }
 
 void grpc_lb_policy_factory_ref(grpc_lb_policy_factory* factory) {
diff --git a/src/core/ext/filters/client_channel/parse_address.cc b/src/core/ext/filters/client_channel/parse_address.cc
index 4b6905eaa3..473c7542df 100644
--- a/src/core/ext/filters/client_channel/parse_address.cc
+++ b/src/core/ext/filters/client_channel/parse_address.cc
@@ -40,7 +40,8 @@ bool grpc_parse_unix(const grpc_uri* uri,
     gpr_log(GPR_ERROR, "Expected 'unix' scheme, got '%s'", uri->scheme);
     return false;
   }
-  struct sockaddr_un* un = (struct sockaddr_un*)resolved_addr->addr;
+  struct sockaddr_un* un =
+      reinterpret_cast<struct sockaddr_un*>(resolved_addr->addr);
   const size_t maxlen = sizeof(un->sun_path);
   const size_t path_len = strnlen(uri->path, maxlen);
   if (path_len == maxlen) return false;
@@ -69,7 +70,7 @@ bool grpc_parse_ipv4_hostport(const char* hostport, grpc_resolved_address* addr,
   // Parse IP address.
   memset(addr, 0, sizeof(*addr));
   addr->len = sizeof(struct sockaddr_in);
-  struct sockaddr_in* in = (struct sockaddr_in*)addr->addr;
+  struct sockaddr_in* in = reinterpret_cast<struct sockaddr_in*>(addr->addr);
   in->sin_family = AF_INET;
   if (inet_pton(AF_INET, host, &in->sin_addr) == 0) {
     if (log_errors) gpr_log(GPR_ERROR, "invalid ipv4 address: '%s'", host);
@@ -85,7 +86,7 @@ bool grpc_parse_ipv4_hostport(const char* hostport, grpc_resolved_address* addr,
     if (log_errors) gpr_log(GPR_ERROR, "invalid ipv4 port: '%s'", port);
     goto done;
   }
-  in->sin_port = htons((uint16_t)port_num);
+  in->sin_port = htons(static_cast<uint16_t>(port_num));
   success = true;
 done:
   gpr_free(host);
@@ -115,14 +116,14 @@ bool grpc_parse_ipv6_hostport(const char* hostport, grpc_resolved_address* addr,
   // Parse IP address.
   memset(addr, 0, sizeof(*addr));
   addr->len = sizeof(struct sockaddr_in6);
-  struct sockaddr_in6* in6 = (struct sockaddr_in6*)addr->addr;
+  struct sockaddr_in6* in6 = reinterpret_cast<struct sockaddr_in6*>(addr->addr);
   in6->sin6_family = AF_INET6;
   // Handle the RFC6874 syntax for IPv6 zone identifiers.
-  char* host_end = (char*)gpr_memrchr(host, '%', strlen(host));
+  char* host_end = static_cast<char*>(gpr_memrchr(host, '%', strlen(host)));
   if (host_end != nullptr) {
     GPR_ASSERT(host_end >= host);
     char host_without_scope[INET6_ADDRSTRLEN];
-    size_t host_without_scope_len = (size_t)(host_end - host);
+    size_t host_without_scope_len = static_cast<size_t>(host_end - host);
     uint32_t sin6_scope_id = 0;
     strncpy(host_without_scope, host, host_without_scope_len);
     host_without_scope[host_without_scope_len] = '\0';
@@ -154,7 +155,7 @@ bool grpc_parse_ipv6_hostport(const char* hostport, grpc_resolved_address* addr,
     if (log_errors) gpr_log(GPR_ERROR, "invalid ipv6 port: '%s'", port);
     goto done;
   }
-  in6->sin6_port = htons((uint16_t)port_num);
+  in6->sin6_port = htons(static_cast<uint16_t>(port_num));
   success = true;
 done:
   gpr_free(host);
diff --git a/src/core/ext/filters/client_channel/proxy_mapper_registry.cc b/src/core/ext/filters/client_channel/proxy_mapper_registry.cc
index 51778a20cc..b42597e363 100644
--- a/src/core/ext/filters/client_channel/proxy_mapper_registry.cc
+++ b/src/core/ext/filters/client_channel/proxy_mapper_registry.cc
@@ -34,8 +34,8 @@ typedef struct {
 static void grpc_proxy_mapper_list_register(grpc_proxy_mapper_list* list,
                                             bool at_start,
                                             grpc_proxy_mapper* mapper) {
-  list->list = (grpc_proxy_mapper**)gpr_realloc(
-      list->list, (list->num_mappers + 1) * sizeof(grpc_proxy_mapper*));
+  list->list = static_cast<grpc_proxy_mapper**>(gpr_realloc(
+      list->list, (list->num_mappers + 1) * sizeof(grpc_proxy_mapper*)));
   if (at_start) {
     memmove(list->list + 1, list->list,
             sizeof(grpc_proxy_mapper*) * list->num_mappers);
diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.cc b/src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.cc
index 6e03ae447f..0442b1e496 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.cc
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/dns_resolver_ares.cc
@@ -312,7 +312,8 @@ void AresDnsResolver::OnResolvedLocked(void* arg, grpc_error* error) {
           if (lb_policy_name != nullptr) {
             args_to_remove[num_args_to_remove++] = GRPC_ARG_LB_POLICY_NAME;
             new_args[num_args_to_add++] = grpc_channel_arg_string_create(
-                (char*)GRPC_ARG_LB_POLICY_NAME, (char*)lb_policy_name);
+                (char*)GRPC_ARG_LB_POLICY_NAME,
+                const_cast<char*>(lb_policy_name));
           }
         }
       }
diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc
index 2bf86f82b0..10bc8f6074 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc
@@ -124,7 +124,8 @@ static void fd_node_shutdown(fd_node* fdn) {
 
 grpc_error* grpc_ares_ev_driver_create(grpc_ares_ev_driver** ev_driver,
                                        grpc_pollset_set* pollset_set) {
-  *ev_driver = (grpc_ares_ev_driver*)gpr_malloc(sizeof(grpc_ares_ev_driver));
+  *ev_driver = static_cast<grpc_ares_ev_driver*>(
+      gpr_malloc(sizeof(grpc_ares_ev_driver)));
   int status = ares_init(&(*ev_driver)->channel);
   gpr_log(GPR_DEBUG, "grpc_ares_ev_driver_create");
   if (status != ARES_SUCCESS) {
@@ -195,7 +196,7 @@ static bool grpc_ares_is_fd_still_readable(grpc_ares_ev_driver* ev_driver,
 }
 
 static void on_readable_cb(void* arg, grpc_error* error) {
-  fd_node* fdn = (fd_node*)arg;
+  fd_node* fdn = static_cast<fd_node*>(arg);
   grpc_ares_ev_driver* ev_driver = fdn->ev_driver;
   gpr_mu_lock(&fdn->mu);
   const int fd = grpc_fd_wrapped_fd(fdn->fd);
@@ -229,7 +230,7 @@ static void on_readable_cb(void* arg, grpc_error* error) {
 }
 
 static void on_writable_cb(void* arg, grpc_error* error) {
-  fd_node* fdn = (fd_node*)arg;
+  fd_node* fdn = static_cast<fd_node*>(arg);
   grpc_ares_ev_driver* ev_driver = fdn->ev_driver;
   gpr_mu_lock(&fdn->mu);
   const int fd = grpc_fd_wrapped_fd(fdn->fd);
@@ -280,7 +281,7 @@ static void grpc_ares_notify_on_event_locked(grpc_ares_ev_driver* ev_driver) {
         if (fdn == nullptr) {
           char* fd_name;
           gpr_asprintf(&fd_name, "ares_ev_driver-%" PRIuPTR, i);
-          fdn = (fd_node*)gpr_malloc(sizeof(fd_node));
+          fdn = static_cast<fd_node*>(gpr_malloc(sizeof(fd_node)));
           gpr_log(GPR_DEBUG, "new fd: %d", socks[i]);
           fdn->fd = grpc_fd_create(socks[i], fd_name);
           fdn->ev_driver = ev_driver;
diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.cc b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.cc
index 3ec1b6f9fe..82b5545601 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.cc
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.cc
@@ -88,7 +88,7 @@ static uint16_t strhtons(const char* port) {
   } else if (strcmp(port, "https") == 0) {
     return htons(443);
   }
-  return htons((unsigned short)atoi(port));
+  return htons(static_cast<unsigned short>(atoi(port)));
 }
 
 static void grpc_ares_request_ref(grpc_ares_request* r) {
@@ -110,8 +110,8 @@ static void grpc_ares_request_unref(grpc_ares_request* r) {
 static grpc_ares_hostbyname_request* create_hostbyname_request(
     grpc_ares_request* parent_request, char* host, uint16_t port,
     bool is_balancer) {
-  grpc_ares_hostbyname_request* hr = (grpc_ares_hostbyname_request*)gpr_zalloc(
-      sizeof(grpc_ares_hostbyname_request));
+  grpc_ares_hostbyname_request* hr = static_cast<grpc_ares_hostbyname_request*>(
+      gpr_zalloc(sizeof(grpc_ares_hostbyname_request)));
   hr->parent_request = parent_request;
   hr->host = gpr_strdup(host);
   hr->port = port;
@@ -128,7 +128,8 @@ static void destroy_hostbyname_request(grpc_ares_hostbyname_request* hr) {
 
 static void on_hostbyname_done_cb(void* arg, int status, int timeouts,
                                   struct hostent* hostent) {
-  grpc_ares_hostbyname_request* hr = (grpc_ares_hostbyname_request*)arg;
+  grpc_ares_hostbyname_request* hr =
+      static_cast<grpc_ares_hostbyname_request*>(arg);
   grpc_ares_request* r = hr->parent_request;
   gpr_mu_lock(&r->mu);
   if (status == ARES_SUCCESS) {
@@ -144,9 +145,9 @@ static void on_hostbyname_done_cb(void* arg, int status, int timeouts,
     for (i = 0; hostent->h_addr_list[i] != nullptr; i++) {
     }
     (*lb_addresses)->num_addresses += i;
-    (*lb_addresses)->addresses = (grpc_lb_address*)gpr_realloc(
-        (*lb_addresses)->addresses,
-        sizeof(grpc_lb_address) * (*lb_addresses)->num_addresses);
+    (*lb_addresses)->addresses = static_cast<grpc_lb_address*>(
+        gpr_realloc((*lb_addresses)->addresses,
+                    sizeof(grpc_lb_address) * (*lb_addresses)->num_addresses));
     for (i = prev_naddr; i < (*lb_addresses)->num_addresses; i++) {
       switch (hostent->h_addrtype) {
         case AF_INET6: {
@@ -155,7 +156,7 @@ static void on_hostbyname_done_cb(void* arg, int status, int timeouts,
           memset(&addr, 0, addr_len);
           memcpy(&addr.sin6_addr, hostent->h_addr_list[i - prev_naddr],
                  sizeof(struct in6_addr));
-          addr.sin6_family = (sa_family_t)hostent->h_addrtype;
+          addr.sin6_family = static_cast<sa_family_t>(hostent->h_addrtype);
           addr.sin6_port = hr->port;
           grpc_lb_addresses_set_address(
               *lb_addresses, i, &addr, addr_len,
@@ -176,7 +177,7 @@ static void on_hostbyname_done_cb(void* arg, int status, int timeouts,
           memset(&addr, 0, addr_len);
           memcpy(&addr.sin_addr, hostent->h_addr_list[i - prev_naddr],
                  sizeof(struct in_addr));
-          addr.sin_family = (sa_family_t)hostent->h_addrtype;
+          addr.sin_family = static_cast<sa_family_t>(hostent->h_addrtype);
           addr.sin_port = hr->port;
           grpc_lb_addresses_set_address(
               *lb_addresses, i, &addr, addr_len,
@@ -211,7 +212,7 @@ static void on_hostbyname_done_cb(void* arg, int status, int timeouts,
 
 static void on_srv_query_done_cb(void* arg, int status, int timeouts,
                                  unsigned char* abuf, int alen) {
-  grpc_ares_request* r = (grpc_ares_request*)arg;
+  grpc_ares_request* r = static_cast<grpc_ares_request*>(arg);
   grpc_core::ExecCtx exec_ctx;
   gpr_log(GPR_DEBUG, "on_query_srv_done_cb");
   if (status == ARES_SUCCESS) {
@@ -259,7 +260,7 @@ static void on_txt_done_cb(void* arg, int status, int timeouts,
                            unsigned char* buf, int len) {
   gpr_log(GPR_DEBUG, "on_txt_done_cb");
   char* error_msg;
-  grpc_ares_request* r = (grpc_ares_request*)arg;
+  grpc_ares_request* r = static_cast<grpc_ares_request*>(arg);
   const size_t prefix_len = sizeof(g_service_config_attribute_prefix) - 1;
   struct ares_txt_ext* result = nullptr;
   struct ares_txt_ext* reply = nullptr;
@@ -279,13 +280,15 @@ static void on_txt_done_cb(void* arg, int status, int timeouts,
   // Found a service config record.
   if (result != nullptr) {
     size_t service_config_len = result->length - prefix_len;
-    *r->service_config_json_out = (char*)gpr_malloc(service_config_len + 1);
+    *r->service_config_json_out =
+        static_cast<char*>(gpr_malloc(service_config_len + 1));
     memcpy(*r->service_config_json_out, result->txt + prefix_len,
            service_config_len);
     for (result = result->next; result != nullptr && !result->record_start;
          result = result->next) {
-      *r->service_config_json_out = (char*)gpr_realloc(
-          *r->service_config_json_out, service_config_len + result->length + 1);
+      *r->service_config_json_out = static_cast<char*>(
+          gpr_realloc(*r->service_config_json_out,
+                      service_config_len + result->length + 1));
       memcpy(*r->service_config_json_out + service_config_len, result->txt,
              result->length);
       service_config_len += result->length;
@@ -348,7 +351,7 @@ static grpc_ares_request* grpc_dns_lookup_ares_impl(
   error = grpc_ares_ev_driver_create(&ev_driver, interested_parties);
   if (error != GRPC_ERROR_NONE) goto error_cleanup;
 
-  r = (grpc_ares_request*)gpr_zalloc(sizeof(grpc_ares_request));
+  r = static_cast<grpc_ares_request*>(gpr_zalloc(sizeof(grpc_ares_request)));
   gpr_mu_init(&r->mu);
   r->ev_driver = ev_driver;
   r->on_done = on_done;
@@ -364,7 +367,7 @@ static grpc_ares_request* grpc_dns_lookup_ares_impl(
     grpc_resolved_address addr;
     if (grpc_parse_ipv4_hostport(dns_server, &addr, false /* log_errors */)) {
       r->dns_server_addr.family = AF_INET;
-      struct sockaddr_in* in = (struct sockaddr_in*)addr.addr;
+      struct sockaddr_in* in = reinterpret_cast<struct sockaddr_in*>(addr.addr);
       memcpy(&r->dns_server_addr.addr.addr4, &in->sin_addr,
              sizeof(struct in_addr));
       r->dns_server_addr.tcp_port = grpc_sockaddr_get_port(&addr);
@@ -372,7 +375,8 @@ static grpc_ares_request* grpc_dns_lookup_ares_impl(
     } else if (grpc_parse_ipv6_hostport(dns_server, &addr,
                                         false /* log_errors */)) {
       r->dns_server_addr.family = AF_INET6;
-      struct sockaddr_in6* in6 = (struct sockaddr_in6*)addr.addr;
+      struct sockaddr_in6* in6 =
+          reinterpret_cast<struct sockaddr_in6*>(addr.addr);
       memcpy(&r->dns_server_addr.addr.addr6, &in6->sin6_addr,
              sizeof(struct in6_addr));
       r->dns_server_addr.tcp_port = grpc_sockaddr_get_port(&addr);
@@ -487,16 +491,17 @@ typedef struct grpc_resolve_address_ares_request {
 
 static void on_dns_lookup_done_cb(void* arg, grpc_error* error) {
   grpc_resolve_address_ares_request* r =
-      (grpc_resolve_address_ares_request*)arg;
+      static_cast<grpc_resolve_address_ares_request*>(arg);
   grpc_resolved_addresses** resolved_addresses = r->addrs_out;
   if (r->lb_addrs == nullptr || r->lb_addrs->num_addresses == 0) {
     *resolved_addresses = nullptr;
   } else {
-    *resolved_addresses =
-        (grpc_resolved_addresses*)gpr_zalloc(sizeof(grpc_resolved_addresses));
+    *resolved_addresses = static_cast<grpc_resolved_addresses*>(
+        gpr_zalloc(sizeof(grpc_resolved_addresses)));
     (*resolved_addresses)->naddrs = r->lb_addrs->num_addresses;
-    (*resolved_addresses)->addrs = (grpc_resolved_address*)gpr_zalloc(
-        sizeof(grpc_resolved_address) * (*resolved_addresses)->naddrs);
+    (*resolved_addresses)->addrs =
+        static_cast<grpc_resolved_address*>(gpr_zalloc(
+            sizeof(grpc_resolved_address) * (*resolved_addresses)->naddrs));
     for (size_t i = 0; i < (*resolved_addresses)->naddrs; i++) {
       GPR_ASSERT(!r->lb_addrs->addresses[i].is_balancer);
       memcpy(&(*resolved_addresses)->addrs[i],
@@ -514,8 +519,8 @@ static void grpc_resolve_address_ares_impl(const char* name,
                                            grpc_closure* on_done,
                                            grpc_resolved_addresses** addrs) {
   grpc_resolve_address_ares_request* r =
-      (grpc_resolve_address_ares_request*)gpr_zalloc(
-          sizeof(grpc_resolve_address_ares_request));
+      static_cast<grpc_resolve_address_ares_request*>(
+          gpr_zalloc(sizeof(grpc_resolve_address_ares_request)));
   r->addrs_out = addrs;
   r->on_resolve_address_done = on_done;
   GRPC_CLOSURE_INIT(&r->on_dns_lookup_done, on_dns_lookup_done_cb, r,
diff --git a/src/core/ext/filters/client_channel/retry_throttle.cc b/src/core/ext/filters/client_channel/retry_throttle.cc
index 0d38feb242..a98e27860a 100644
--- a/src/core/ext/filters/client_channel/retry_throttle.cc
+++ b/src/core/ext/filters/client_channel/retry_throttle.cc
@@ -59,9 +59,10 @@ bool grpc_server_retry_throttle_data_record_failure(
   // First, check if we are stale and need to be replaced.
   get_replacement_throttle_data_if_needed(&throttle_data);
   // We decrement milli_tokens by 1000 (1 token) for each failure.
-  const int new_value = (int)gpr_atm_no_barrier_clamped_add(
-      &throttle_data->milli_tokens, (gpr_atm)-1000, (gpr_atm)0,
-      (gpr_atm)throttle_data->max_milli_tokens);
+  const int new_value = static_cast<int>(gpr_atm_no_barrier_clamped_add(
+      &throttle_data->milli_tokens, static_cast<gpr_atm>(-1000),
+      static_cast<gpr_atm>(0),
+      static_cast<gpr_atm>(throttle_data->max_milli_tokens)));
   // Retries are allowed as long as the new value is above the threshold
   // (max_milli_tokens / 2).
   return new_value > throttle_data->max_milli_tokens / 2;
@@ -73,8 +74,10 @@ void grpc_server_retry_throttle_data_record_success(
   get_replacement_throttle_data_if_needed(&throttle_data);
   // We increment milli_tokens by milli_token_ratio for each success.
   gpr_atm_no_barrier_clamped_add(
-      &throttle_data->milli_tokens, (gpr_atm)throttle_data->milli_token_ratio,
-      (gpr_atm)0, (gpr_atm)throttle_data->max_milli_tokens);
+      &throttle_data->milli_tokens,
+      static_cast<gpr_atm>(throttle_data->milli_token_ratio),
+      static_cast<gpr_atm>(0),
+      static_cast<gpr_atm>(throttle_data->max_milli_tokens));
 }
 
 grpc_server_retry_throttle_data* grpc_server_retry_throttle_data_ref(
@@ -100,7 +103,8 @@ static grpc_server_retry_throttle_data* grpc_server_retry_throttle_data_create(
     int max_milli_tokens, int milli_token_ratio,
     grpc_server_retry_throttle_data* old_throttle_data) {
   grpc_server_retry_throttle_data* throttle_data =
-      (grpc_server_retry_throttle_data*)gpr_malloc(sizeof(*throttle_data));
+      static_cast<grpc_server_retry_throttle_data*>(
+          gpr_malloc(sizeof(*throttle_data)));
   memset(throttle_data, 0, sizeof(*throttle_data));
   gpr_ref_init(&throttle_data->refs, 1);
   throttle_data->max_milli_tokens = max_milli_tokens;
@@ -112,9 +116,9 @@ static grpc_server_retry_throttle_data* grpc_server_retry_throttle_data_create(
   // we will start out doing the same thing on the new one.
   if (old_throttle_data != nullptr) {
     double token_fraction =
-        (int)gpr_atm_acq_load(&old_throttle_data->milli_tokens) /
-        (double)old_throttle_data->max_milli_tokens;
-    initial_milli_tokens = (int)(token_fraction * max_milli_tokens);
+        static_cast<int>(gpr_atm_acq_load(&old_throttle_data->milli_tokens)) /
+        static_cast<double>(old_throttle_data->max_milli_tokens);
+    initial_milli_tokens = static_cast<int>(token_fraction * max_milli_tokens);
   }
   gpr_atm_rel_store(&throttle_data->milli_tokens,
                     (gpr_atm)initial_milli_tokens);
@@ -132,22 +136,22 @@ static grpc_server_retry_throttle_data* grpc_server_retry_throttle_data_create(
 //
 
 static void* copy_server_name(void* key, void* unused) {
-  return gpr_strdup((const char*)key);
+  return gpr_strdup(static_cast<const char*>(key));
 }
 
 static long compare_server_name(void* key1, void* key2, void* unused) {
-  return strcmp((const char*)key1, (const char*)key2);
+  return strcmp(static_cast<const char*>(key1), static_cast<const char*>(key2));
 }
 
 static void destroy_server_retry_throttle_data(void* value, void* unused) {
   grpc_server_retry_throttle_data* throttle_data =
-      (grpc_server_retry_throttle_data*)value;
+      static_cast<grpc_server_retry_throttle_data*>(value);
   grpc_server_retry_throttle_data_unref(throttle_data);
 }
 
 static void* copy_server_retry_throttle_data(void* value, void* unused) {
   grpc_server_retry_throttle_data* throttle_data =
-      (grpc_server_retry_throttle_data*)value;
+      static_cast<grpc_server_retry_throttle_data*>(value);
   return grpc_server_retry_throttle_data_ref(throttle_data);
 }
 
@@ -178,13 +182,14 @@ grpc_server_retry_throttle_data* grpc_retry_throttle_map_get_data_for_server(
     const char* server_name, int max_milli_tokens, int milli_token_ratio) {
   gpr_mu_lock(&g_mu);
   grpc_server_retry_throttle_data* throttle_data =
-      (grpc_server_retry_throttle_data*)grpc_avl_get(g_avl, (char*)server_name,
-                                                     nullptr);
+      static_cast<grpc_server_retry_throttle_data*>(
+          grpc_avl_get(g_avl, const_cast<char*>(server_name), nullptr));
   if (throttle_data == nullptr) {
     // Entry not found.  Create a new one.
     throttle_data = grpc_server_retry_throttle_data_create(
         max_milli_tokens, milli_token_ratio, nullptr);
-    g_avl = grpc_avl_add(g_avl, (char*)server_name, throttle_data, nullptr);
+    g_avl = grpc_avl_add(g_avl, const_cast<char*>(server_name), throttle_data,
+                         nullptr);
   } else {
     if (throttle_data->max_milli_tokens != max_milli_tokens ||
         throttle_data->milli_token_ratio != milli_token_ratio) {
@@ -192,7 +197,8 @@ grpc_server_retry_throttle_data* grpc_retry_throttle_map_get_data_for_server(
       // the original one.
       throttle_data = grpc_server_retry_throttle_data_create(
           max_milli_tokens, milli_token_ratio, throttle_data);
-      g_avl = grpc_avl_add(g_avl, (char*)server_name, throttle_data, nullptr);
+      g_avl = grpc_avl_add(g_avl, const_cast<char*>(server_name), throttle_data,
+                           nullptr);
     } else {
       // Entry found.  Increase refcount.
       grpc_server_retry_throttle_data_ref(throttle_data);
diff --git a/src/core/ext/filters/client_channel/subchannel.cc b/src/core/ext/filters/client_channel/subchannel.cc
index 6d4c4f931e..179e3f27ac 100644
--- a/src/core/ext/filters/client_channel/subchannel.cc
+++ b/src/core/ext/filters/client_channel/subchannel.cc
@@ -159,7 +159,7 @@ static void on_subchannel_connected(void* subchannel, grpc_error* error);
  */
 
 static void connection_destroy(void* arg, grpc_error* error) {
-  grpc_channel_stack* stk = (grpc_channel_stack*)arg;
+  grpc_channel_stack* stk = static_cast<grpc_channel_stack*>(arg);
   grpc_channel_stack_destroy(stk);
   gpr_free(stk);
 }
@@ -169,7 +169,7 @@ static void connection_destroy(void* arg, grpc_error* error) {
  */
 
 static void subchannel_destroy(void* arg, grpc_error* error) {
-  grpc_subchannel* c = (grpc_subchannel*)arg;
+  grpc_subchannel* c = static_cast<grpc_subchannel*>(arg);
   gpr_free((void*)c->filters);
   grpc_channel_args_destroy(c->args);
   grpc_connectivity_state_destroy(&c->state_tracker);
@@ -241,8 +241,9 @@ static void disconnect(grpc_subchannel* c) {
 void grpc_subchannel_unref(grpc_subchannel* c GRPC_SUBCHANNEL_REF_EXTRA_ARGS) {
   gpr_atm old_refs;
   // add a weak ref and subtract a strong ref (atomically)
-  old_refs = ref_mutate(c, (gpr_atm)1 - (gpr_atm)(1 << INTERNAL_REF_BITS),
-                        1 REF_MUTATE_PURPOSE("STRONG_UNREF"));
+  old_refs = ref_mutate(
+      c, static_cast<gpr_atm>(1) - static_cast<gpr_atm>(1 << INTERNAL_REF_BITS),
+      1 REF_MUTATE_PURPOSE("STRONG_UNREF"));
   if ((old_refs & STRONG_REF_MASK) == (1 << INTERNAL_REF_BITS)) {
     disconnect(c);
   }
@@ -252,7 +253,8 @@ void grpc_subchannel_unref(grpc_subchannel* c GRPC_SUBCHANNEL_REF_EXTRA_ARGS) {
 void grpc_subchannel_weak_unref(
     grpc_subchannel* c GRPC_SUBCHANNEL_REF_EXTRA_ARGS) {
   gpr_atm old_refs;
-  old_refs = ref_mutate(c, -(gpr_atm)1, 1 REF_MUTATE_PURPOSE("WEAK_UNREF"));
+  old_refs = ref_mutate(c, -static_cast<gpr_atm>(1),
+                        1 REF_MUTATE_PURPOSE("WEAK_UNREF"));
   if (old_refs == 1) {
     GRPC_CLOSURE_SCHED(
         GRPC_CLOSURE_CREATE(subchannel_destroy, c, grpc_schedule_on_exec_ctx),
@@ -318,15 +320,15 @@ grpc_subchannel* grpc_subchannel_create(grpc_connector* connector,
   }
 
   GRPC_STATS_INC_CLIENT_SUBCHANNELS_CREATED();
-  c = (grpc_subchannel*)gpr_zalloc(sizeof(*c));
+  c = static_cast<grpc_subchannel*>(gpr_zalloc(sizeof(*c)));
   c->key = key;
   gpr_atm_no_barrier_store(&c->ref_pair, 1 << INTERNAL_REF_BITS);
   c->connector = connector;
   grpc_connector_ref(c->connector);
   c->num_filters = args->filter_count;
   if (c->num_filters > 0) {
-    c->filters = (const grpc_channel_filter**)gpr_malloc(
-        sizeof(grpc_channel_filter*) * c->num_filters);
+    c->filters = static_cast<const grpc_channel_filter**>(
+        gpr_malloc(sizeof(grpc_channel_filter*) * c->num_filters));
     memcpy((void*)c->filters, args->filters,
            sizeof(grpc_channel_filter*) * c->num_filters);
   } else {
@@ -334,7 +336,7 @@ grpc_subchannel* grpc_subchannel_create(grpc_connector* connector,
   }
   c->pollset_set = grpc_pollset_set_create();
   grpc_resolved_address* addr =
-      (grpc_resolved_address*)gpr_malloc(sizeof(*addr));
+      static_cast<grpc_resolved_address*>(gpr_malloc(sizeof(*addr)));
   grpc_get_subchannel_address_arg(args->args, addr);
   grpc_resolved_address* new_address = nullptr;
   grpc_channel_args* new_args = nullptr;
@@ -391,7 +393,7 @@ grpc_connectivity_state grpc_subchannel_check_connectivity(grpc_subchannel* c,
 }
 
 static void on_external_state_watcher_done(void* arg, grpc_error* error) {
-  external_state_watcher* w = (external_state_watcher*)arg;
+  external_state_watcher* w = static_cast<external_state_watcher*>(arg);
   grpc_closure* follow_up = w->notify;
   if (w->pollset_set != nullptr) {
     grpc_pollset_set_del_pollset_set(w->subchannel->pollset_set,
@@ -407,7 +409,7 @@ static void on_external_state_watcher_done(void* arg, grpc_error* error) {
 }
 
 static void on_alarm(void* arg, grpc_error* error) {
-  grpc_subchannel* c = (grpc_subchannel*)arg;
+  grpc_subchannel* c = static_cast<grpc_subchannel*>(arg);
   gpr_mu_lock(&c->mu);
   c->have_alarm = false;
   if (c->disconnected) {
@@ -486,7 +488,7 @@ void grpc_subchannel_notify_on_state_change(
     }
     gpr_mu_unlock(&c->mu);
   } else {
-    w = (external_state_watcher*)gpr_malloc(sizeof(*w));
+    w = static_cast<external_state_watcher*>(gpr_malloc(sizeof(*w)));
     w->subchannel = c;
     w->pollset_set = interested_parties;
     w->notify = notify;
@@ -509,7 +511,7 @@ void grpc_subchannel_notify_on_state_change(
 
 static void on_connected_subchannel_connectivity_changed(void* p,
                                                          grpc_error* error) {
-  state_watcher* connected_subchannel_watcher = (state_watcher*)p;
+  state_watcher* connected_subchannel_watcher = static_cast<state_watcher*>(p);
   grpc_subchannel* c = connected_subchannel_watcher->subchannel;
   gpr_mu* mu = &c->mu;
 
@@ -570,7 +572,8 @@ static bool publish_transport_locked(grpc_subchannel* c) {
   }
   grpc_channel_stack* stk;
   grpc_error* error = grpc_channel_stack_builder_finish(
-      builder, 0, 1, connection_destroy, nullptr, (void**)&stk);
+      builder, 0, 1, connection_destroy, nullptr,
+      reinterpret_cast<void**>(&stk));
   if (error != GRPC_ERROR_NONE) {
     grpc_transport_destroy(c->connecting_result.transport);
     gpr_log(GPR_ERROR, "error initializing subchannel stack: %s",
@@ -581,8 +584,8 @@ static bool publish_transport_locked(grpc_subchannel* c) {
   memset(&c->connecting_result, 0, sizeof(c->connecting_result));
 
   /* initialize state watcher */
-  state_watcher* connected_subchannel_watcher =
-      (state_watcher*)gpr_zalloc(sizeof(*connected_subchannel_watcher));
+  state_watcher* connected_subchannel_watcher = static_cast<state_watcher*>(
+      gpr_zalloc(sizeof(*connected_subchannel_watcher)));
   connected_subchannel_watcher->subchannel = c;
   connected_subchannel_watcher->connectivity_state = GRPC_CHANNEL_READY;
   GRPC_CLOSURE_INIT(&connected_subchannel_watcher->closure,
@@ -617,7 +620,7 @@ static bool publish_transport_locked(grpc_subchannel* c) {
 }
 
 static void on_subchannel_connected(void* arg, grpc_error* error) {
-  grpc_subchannel* c = (grpc_subchannel*)arg;
+  grpc_subchannel* c = static_cast<grpc_subchannel*>(arg);
   grpc_channel_args* delete_channel_args = c->connecting_result.channel_args;
 
   GRPC_SUBCHANNEL_WEAK_REF(c, "on_subchannel_connected");
@@ -653,7 +656,7 @@ static void on_subchannel_connected(void* arg, grpc_error* error) {
 
 static void subchannel_call_destroy(void* call, grpc_error* error) {
   GPR_TIMER_SCOPE("grpc_subchannel_call_unref.destroy", 0);
-  grpc_subchannel_call* c = (grpc_subchannel_call*)call;
+  grpc_subchannel_call* c = static_cast<grpc_subchannel_call*>(call);
   GPR_ASSERT(c->schedule_closure_after_destroy != nullptr);
   grpc_core::ConnectedSubchannel* connection = c->connection;
   grpc_call_stack_destroy(SUBCHANNEL_CALL_TO_CALL_STACK(c), nullptr,
@@ -770,9 +773,9 @@ void ConnectedSubchannel::Ping(grpc_closure* on_initiate,
 
 grpc_error* ConnectedSubchannel::CreateCall(const CallArgs& args,
                                             grpc_subchannel_call** call) {
-  *call = (grpc_subchannel_call*)gpr_arena_alloc(
+  *call = static_cast<grpc_subchannel_call*>(gpr_arena_alloc(
       args.arena,
-      sizeof(grpc_subchannel_call) + channel_stack_->call_stack_size);
+      sizeof(grpc_subchannel_call) + channel_stack_->call_stack_size));
   grpc_call_stack* callstk = SUBCHANNEL_CALL_TO_CALL_STACK(*call);
   RefCountedPtr<ConnectedSubchannel> connection =
       Ref(DEBUG_LOCATION, "subchannel_call");
diff --git a/src/core/ext/filters/client_channel/subchannel_index.cc b/src/core/ext/filters/client_channel/subchannel_index.cc
index 69dbdccc18..d1dc5ee970 100644
--- a/src/core/ext/filters/client_channel/subchannel_index.cc
+++ b/src/core/ext/filters/client_channel/subchannel_index.cc
@@ -45,13 +45,14 @@ static bool g_force_creation = false;
 static grpc_subchannel_key* create_key(
     const grpc_subchannel_args* args,
     grpc_channel_args* (*copy_channel_args)(const grpc_channel_args* args)) {
-  grpc_subchannel_key* k = (grpc_subchannel_key*)gpr_malloc(sizeof(*k));
+  grpc_subchannel_key* k =
+      static_cast<grpc_subchannel_key*>(gpr_malloc(sizeof(*k)));
   k->args.filter_count = args->filter_count;
   if (k->args.filter_count > 0) {
-    k->args.filters = (const grpc_channel_filter**)gpr_malloc(
-        sizeof(*k->args.filters) * k->args.filter_count);
-    memcpy((grpc_channel_filter*)k->args.filters, args->filters,
-           sizeof(*k->args.filters) * k->args.filter_count);
+    k->args.filters = static_cast<const grpc_channel_filter**>(
+        gpr_malloc(sizeof(*k->args.filters) * k->args.filter_count));
+    memcpy(reinterpret_cast<grpc_channel_filter*>(k->args.filters),
+           args->filters, sizeof(*k->args.filters) * k->args.filter_count);
   } else {
     k->args.filters = nullptr;
   }
@@ -82,22 +83,22 @@ int grpc_subchannel_key_compare(const grpc_subchannel_key* a,
 }
 
 void grpc_subchannel_key_destroy(grpc_subchannel_key* k) {
-  gpr_free((grpc_channel_args*)k->args.filters);
-  grpc_channel_args_destroy((grpc_channel_args*)k->args.args);
+  gpr_free(reinterpret_cast<grpc_channel_args*>(k->args.filters));
+  grpc_channel_args_destroy(const_cast<grpc_channel_args*>(k->args.args));
   gpr_free(k);
 }
 
 static void sck_avl_destroy(void* p, void* user_data) {
-  grpc_subchannel_key_destroy((grpc_subchannel_key*)p);
+  grpc_subchannel_key_destroy(static_cast<grpc_subchannel_key*>(p));
 }
 
 static void* sck_avl_copy(void* p, void* unused) {
-  return subchannel_key_copy((grpc_subchannel_key*)p);
+  return subchannel_key_copy(static_cast<grpc_subchannel_key*>(p));
 }
 
 static long sck_avl_compare(void* a, void* b, void* unused) {
-  return grpc_subchannel_key_compare((grpc_subchannel_key*)a,
-                                     (grpc_subchannel_key*)b);
+  return grpc_subchannel_key_compare(static_cast<grpc_subchannel_key*>(a),
+                                     static_cast<grpc_subchannel_key*>(b));
 }
 
 static void scv_avl_destroy(void* p, void* user_data) {
@@ -170,7 +171,8 @@ grpc_subchannel* grpc_subchannel_index_register(grpc_subchannel_key* key,
     gpr_mu_unlock(&g_mu);
 
     // - Check to see if a subchannel already exists
-    c = (grpc_subchannel*)grpc_avl_get(index, key, grpc_core::ExecCtx::Get());
+    c = static_cast<grpc_subchannel*>(
+        grpc_avl_get(index, key, grpc_core::ExecCtx::Get()));
     if (c != nullptr) {
       c = GRPC_SUBCHANNEL_REF_FROM_WEAK_REF(c, "index_register");
     }
@@ -220,8 +222,8 @@ void grpc_subchannel_index_unregister(grpc_subchannel_key* key,
 
     // Check to see if this key still refers to the previously
     // registered subchannel
-    grpc_subchannel* c =
-        (grpc_subchannel*)grpc_avl_get(index, key, grpc_core::ExecCtx::Get());
+    grpc_subchannel* c = static_cast<grpc_subchannel*>(
+        grpc_avl_get(index, key, grpc_core::ExecCtx::Get()));
     if (c != constructed) {
       grpc_avl_unref(index, grpc_core::ExecCtx::Get());
       break;
diff --git a/src/core/ext/filters/client_channel/uri_parser.cc b/src/core/ext/filters/client_channel/uri_parser.cc
index c5f2d6822c..cd07a6fbf5 100644
--- a/src/core/ext/filters/client_channel/uri_parser.cc
+++ b/src/core/ext/filters/client_channel/uri_parser.cc
@@ -45,7 +45,7 @@ static grpc_uri* bad_uri(const char* uri_text, size_t pos, const char* section,
     gpr_log(GPR_ERROR, "%s%s'", line_prefix, uri_text);
     gpr_free(line_prefix);
 
-    line_prefix = (char*)gpr_malloc(pfx_len + 1);
+    line_prefix = static_cast<char*>(gpr_malloc(pfx_len + 1));
     memset(line_prefix, ' ', pfx_len);
     line_prefix[pfx_len] = 0;
     gpr_log(GPR_ERROR, "%s^ here", line_prefix);
@@ -159,7 +159,7 @@ static void parse_query_parts(grpc_uri* uri) {
   gpr_string_split(uri->query, QUERY_PARTS_SEPARATOR, &uri->query_parts,
                    &uri->num_query_parts);
   uri->query_parts_values =
-      (char**)gpr_malloc(uri->num_query_parts * sizeof(char**));
+      static_cast<char**>(gpr_malloc(uri->num_query_parts * sizeof(char**)));
   for (size_t i = 0; i < uri->num_query_parts; i++) {
     char** query_param_parts;
     size_t num_query_param_parts;
@@ -271,7 +271,7 @@ grpc_uri* grpc_uri_parse(const char* uri_text, bool suppress_errors) {
     fragment_end = i;
   }
 
-  uri = (grpc_uri*)gpr_zalloc(sizeof(*uri));
+  uri = static_cast<grpc_uri*>(gpr_zalloc(sizeof(*uri)));
   uri->scheme = decode_and_copy_component(uri_text, scheme_begin, scheme_end);
   uri->authority =
       decode_and_copy_component(uri_text, authority_begin, authority_end);
diff --git a/src/core/ext/filters/deadline/deadline_filter.cc b/src/core/ext/filters/deadline/deadline_filter.cc
index c430f3d2d4..76c1204090 100644
--- a/src/core/ext/filters/deadline/deadline_filter.cc
+++ b/src/core/ext/filters/deadline/deadline_filter.cc
@@ -37,7 +37,7 @@
 // The on_complete callback used when sending a cancel_error batch down the
 // filter stack.  Yields the call combiner when the batch returns.
 static void yield_call_combiner(void* arg, grpc_error* ignored) {
-  grpc_deadline_state* deadline_state = (grpc_deadline_state*)arg;
+  grpc_deadline_state* deadline_state = static_cast<grpc_deadline_state*>(arg);
   GRPC_CALL_COMBINER_STOP(deadline_state->call_combiner,
                           "got on_complete from cancel_stream batch");
   GRPC_CALL_STACK_UNREF(deadline_state->call_stack, "deadline_timer");
@@ -46,8 +46,9 @@ static void yield_call_combiner(void* arg, grpc_error* ignored) {
 // This is called via the call combiner, so access to deadline_state is
 // synchronized.
 static void send_cancel_op_in_call_combiner(void* arg, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)arg;
-  grpc_deadline_state* deadline_state = (grpc_deadline_state*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(arg);
+  grpc_deadline_state* deadline_state =
+      static_cast<grpc_deadline_state*>(elem->call_data);
   grpc_transport_stream_op_batch* batch = grpc_make_transport_stream_op(
       GRPC_CLOSURE_INIT(&deadline_state->timer_callback, yield_call_combiner,
                         deadline_state, grpc_schedule_on_exec_ctx));
@@ -58,8 +59,9 @@ static void send_cancel_op_in_call_combiner(void* arg, grpc_error* error) {
 
 // Timer callback.
 static void timer_callback(void* arg, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)arg;
-  grpc_deadline_state* deadline_state = (grpc_deadline_state*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(arg);
+  grpc_deadline_state* deadline_state =
+      static_cast<grpc_deadline_state*>(elem->call_data);
   if (error != GRPC_ERROR_CANCELLED) {
     error = grpc_error_set_int(
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("Deadline Exceeded"),
@@ -85,7 +87,8 @@ static void start_timer_if_needed(grpc_call_element* elem,
   if (deadline == GRPC_MILLIS_INF_FUTURE) {
     return;
   }
-  grpc_deadline_state* deadline_state = (grpc_deadline_state*)elem->call_data;
+  grpc_deadline_state* deadline_state =
+      static_cast<grpc_deadline_state*>(elem->call_data);
   grpc_closure* closure = nullptr;
   switch (deadline_state->timer_state) {
     case GRPC_DEADLINE_STATE_PENDING:
@@ -126,7 +129,7 @@ static void cancel_timer_if_needed(grpc_deadline_state* deadline_state) {
 
 // Callback run when the call is complete.
 static void on_complete(void* arg, grpc_error* error) {
-  grpc_deadline_state* deadline_state = (grpc_deadline_state*)arg;
+  grpc_deadline_state* deadline_state = static_cast<grpc_deadline_state*>(arg);
   cancel_timer_if_needed(deadline_state);
   // Invoke the next callback.
   GRPC_CLOSURE_RUN(deadline_state->next_on_complete, GRPC_ERROR_REF(error));
@@ -151,9 +154,9 @@ struct start_timer_after_init_state {
 };
 static void start_timer_after_init(void* arg, grpc_error* error) {
   struct start_timer_after_init_state* state =
-      (struct start_timer_after_init_state*)arg;
+      static_cast<struct start_timer_after_init_state*>(arg);
   grpc_deadline_state* deadline_state =
-      (grpc_deadline_state*)state->elem->call_data;
+      static_cast<grpc_deadline_state*>(state->elem->call_data);
   if (!state->in_call_combiner) {
     // We are initially called without holding the call combiner, so we
     // need to bounce ourselves into it.
@@ -173,7 +176,8 @@ void grpc_deadline_state_init(grpc_call_element* elem,
                               grpc_call_stack* call_stack,
                               grpc_call_combiner* call_combiner,
                               grpc_millis deadline) {
-  grpc_deadline_state* deadline_state = (grpc_deadline_state*)elem->call_data;
+  grpc_deadline_state* deadline_state =
+      static_cast<grpc_deadline_state*>(elem->call_data);
   deadline_state->call_stack = call_stack;
   deadline_state->call_combiner = call_combiner;
   // Deadline will always be infinite on servers, so the timer will only be
@@ -187,7 +191,8 @@ void grpc_deadline_state_init(grpc_call_element* elem,
     // create a closure to start the timer, and we schedule that closure
     // to be run after call stack initialization is done.
     struct start_timer_after_init_state* state =
-        (struct start_timer_after_init_state*)gpr_zalloc(sizeof(*state));
+        static_cast<struct start_timer_after_init_state*>(
+            gpr_zalloc(sizeof(*state)));
     state->elem = elem;
     state->deadline = deadline;
     GRPC_CLOSURE_INIT(&state->closure, start_timer_after_init, state,
@@ -197,20 +202,23 @@ void grpc_deadline_state_init(grpc_call_element* elem,
 }
 
 void grpc_deadline_state_destroy(grpc_call_element* elem) {
-  grpc_deadline_state* deadline_state = (grpc_deadline_state*)elem->call_data;
+  grpc_deadline_state* deadline_state =
+      static_cast<grpc_deadline_state*>(elem->call_data);
   cancel_timer_if_needed(deadline_state);
 }
 
 void grpc_deadline_state_reset(grpc_call_element* elem,
                                grpc_millis new_deadline) {
-  grpc_deadline_state* deadline_state = (grpc_deadline_state*)elem->call_data;
+  grpc_deadline_state* deadline_state =
+      static_cast<grpc_deadline_state*>(elem->call_data);
   cancel_timer_if_needed(deadline_state);
   start_timer_if_needed(elem, new_deadline);
 }
 
 void grpc_deadline_state_client_start_transport_stream_op_batch(
     grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
-  grpc_deadline_state* deadline_state = (grpc_deadline_state*)elem->call_data;
+  grpc_deadline_state* deadline_state =
+      static_cast<grpc_deadline_state*>(elem->call_data);
   if (op->cancel_stream) {
     cancel_timer_if_needed(deadline_state);
   } else {
@@ -278,8 +286,8 @@ static void client_start_transport_stream_op_batch(
 
 // Callback for receiving initial metadata on the server.
 static void recv_initial_metadata_ready(void* arg, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)arg;
-  server_call_data* calld = (server_call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(arg);
+  server_call_data* calld = static_cast<server_call_data*>(elem->call_data);
   // Get deadline from metadata and start the timer if needed.
   start_timer_if_needed(elem, calld->recv_initial_metadata->deadline);
   // Invoke the next callback.
@@ -290,7 +298,7 @@ static void recv_initial_metadata_ready(void* arg, grpc_error* error) {
 // Method for starting a call op for server filter.
 static void server_start_transport_stream_op_batch(
     grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
-  server_call_data* calld = (server_call_data*)elem->call_data;
+  server_call_data* calld = static_cast<server_call_data*>(elem->call_data);
   if (op->cancel_stream) {
     cancel_timer_if_needed(&calld->base.deadline_state);
   } else {
@@ -360,7 +368,8 @@ static bool maybe_add_deadline_filter(grpc_channel_stack_builder* builder,
   return grpc_deadline_checking_enabled(
              grpc_channel_stack_builder_get_channel_arguments(builder))
              ? grpc_channel_stack_builder_prepend_filter(
-                   builder, (const grpc_channel_filter*)arg, nullptr, nullptr)
+                   builder, static_cast<const grpc_channel_filter*>(arg),
+                   nullptr, nullptr)
              : true;
 }
 
diff --git a/src/core/ext/filters/http/client/http_client_filter.cc b/src/core/ext/filters/http/client/http_client_filter.cc
index befd5a3c28..80643f8584 100644
--- a/src/core/ext/filters/http/client/http_client_filter.cc
+++ b/src/core/ext/filters/http/client/http_client_filter.cc
@@ -138,8 +138,8 @@ static grpc_error* client_filter_incoming_metadata(grpc_call_element* elem,
 }
 
 static void recv_initial_metadata_ready(void* user_data, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)user_data;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(user_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (error == GRPC_ERROR_NONE) {
     error = client_filter_incoming_metadata(elem, calld->recv_initial_metadata);
   } else {
@@ -150,8 +150,8 @@ static void recv_initial_metadata_ready(void* user_data, grpc_error* error) {
 
 static void recv_trailing_metadata_on_complete(void* user_data,
                                                grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)user_data;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(user_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (error == GRPC_ERROR_NONE) {
     error =
         client_filter_incoming_metadata(elem, calld->recv_trailing_metadata);
@@ -162,8 +162,8 @@ static void recv_trailing_metadata_on_complete(void* user_data,
 }
 
 static void send_message_on_complete(void* arg, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)arg;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(arg);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   grpc_byte_stream_cache_destroy(&calld->send_message_cache);
   GRPC_CLOSURE_RUN(calld->original_send_message_on_complete,
                    GRPC_ERROR_REF(error));
@@ -189,7 +189,8 @@ static grpc_error* pull_slice_from_send_message(call_data* calld) {
 // and on_send_message_next_done() will be invoked when it is complete.
 static grpc_error* read_all_available_send_message_data(call_data* calld) {
   while (grpc_byte_stream_next(&calld->send_message_caching_stream.base,
-                               ~(size_t)0, &calld->on_send_message_next_done)) {
+                               ~static_cast<size_t>(0),
+                               &calld->on_send_message_next_done)) {
     grpc_error* error = pull_slice_from_send_message(calld);
     if (error != GRPC_ERROR_NONE) return error;
     if (calld->send_message_bytes_read ==
@@ -202,8 +203,8 @@ static grpc_error* read_all_available_send_message_data(call_data* calld) {
 
 // Async callback for grpc_byte_stream_next().
 static void on_send_message_next_done(void* arg, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)arg;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(arg);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (error != GRPC_ERROR_NONE) {
     grpc_transport_stream_op_batch_finish_with_failure(
         calld->send_message_batch, error, calld->call_combiner);
@@ -224,7 +225,8 @@ static void on_send_message_next_done(void* arg, grpc_error* error) {
 }
 
 static char* slice_buffer_to_string(grpc_slice_buffer* slice_buffer) {
-  char* payload_bytes = (char*)gpr_malloc(slice_buffer->length + 1);
+  char* payload_bytes =
+      static_cast<char*>(gpr_malloc(slice_buffer->length + 1));
   size_t offset = 0;
   for (size_t i = 0; i < slice_buffer->count; ++i) {
     memcpy(payload_bytes + offset,
@@ -240,7 +242,7 @@ static char* slice_buffer_to_string(grpc_slice_buffer* slice_buffer) {
 // append the base64-encoded query for a GET request.
 static grpc_error* update_path_for_get(grpc_call_element* elem,
                                        grpc_transport_stream_op_batch* batch) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   grpc_slice path_slice =
       GRPC_MDVALUE(batch->payload->send_initial_metadata.send_initial_metadata
                        ->idx.named.path->md);
@@ -253,19 +255,21 @@ static grpc_error* update_path_for_get(grpc_call_element* elem,
       false /* multi_line */);
   grpc_slice path_with_query_slice = GRPC_SLICE_MALLOC(estimated_len);
   /* memcopy individual pieces into this slice */
-  char* write_ptr = (char*)GRPC_SLICE_START_PTR(path_with_query_slice);
-  char* original_path = (char*)GRPC_SLICE_START_PTR(path_slice);
+  char* write_ptr =
+      reinterpret_cast<char*> GRPC_SLICE_START_PTR(path_with_query_slice);
+  char* original_path =
+      reinterpret_cast<char*> GRPC_SLICE_START_PTR(path_slice);
   memcpy(write_ptr, original_path, GRPC_SLICE_LENGTH(path_slice));
   write_ptr += GRPC_SLICE_LENGTH(path_slice);
   *write_ptr++ = '?';
   char* payload_bytes =
       slice_buffer_to_string(&calld->send_message_cache.cache_buffer);
-  grpc_base64_encode_core((char*)write_ptr, payload_bytes,
+  grpc_base64_encode_core(write_ptr, payload_bytes,
                           batch->payload->send_message.send_message->length,
                           true /* url_safe */, false /* multi_line */);
   gpr_free(payload_bytes);
   /* remove trailing unused memory and add trailing 0 to terminate string */
-  char* t = (char*)GRPC_SLICE_START_PTR(path_with_query_slice);
+  char* t = reinterpret_cast<char*> GRPC_SLICE_START_PTR(path_with_query_slice);
   /* safe to use strlen since base64_encode will always add '\0' */
   path_with_query_slice =
       grpc_slice_sub_no_ref(path_with_query_slice, 0, strlen(t));
@@ -287,8 +291,8 @@ static void remove_if_present(grpc_metadata_batch* batch,
 
 static void hc_start_transport_stream_op_batch(
     grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
-  call_data* calld = (call_data*)elem->call_data;
-  channel_data* channeld = (channel_data*)elem->channel_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
+  channel_data* channeld = static_cast<channel_data*>(elem->channel_data);
   GPR_TIMER_SCOPE("hc_start_transport_stream_op_batch", 0);
 
   if (batch->recv_initial_metadata) {
@@ -409,7 +413,7 @@ done:
 /* Constructor for call_data */
 static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   calld->call_combiner = args->call_combiner;
   GRPC_CLOSURE_INIT(&calld->recv_initial_metadata_ready,
                     recv_initial_metadata_ready, elem,
@@ -458,7 +462,7 @@ static size_t max_payload_size_from_args(const grpc_channel_args* args) {
           gpr_log(GPR_ERROR, "%s: must be an integer",
                   GRPC_ARG_MAX_PAYLOAD_SIZE_FOR_GET);
         } else {
-          return (size_t)args->args[i].value.integer;
+          return static_cast<size_t>(args->args[i].value.integer);
         }
       }
     }
@@ -519,7 +523,7 @@ static grpc_slice user_agent_from_args(const grpc_channel_args* args,
 /* Constructor for channel_data */
 static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   GPR_ASSERT(!args->is_last);
   GPR_ASSERT(args->optional_transport != nullptr);
   chand->static_scheme = scheme_from_args(args->channel_args);
@@ -534,7 +538,7 @@ static grpc_error* init_channel_elem(grpc_channel_element* elem,
 
 /* Destructor for channel data */
 static void destroy_channel_elem(grpc_channel_element* elem) {
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   GRPC_MDELEM_UNREF(chand->user_agent);
 }
 
diff --git a/src/core/ext/filters/http/http_filters_plugin.cc b/src/core/ext/filters/http/http_filters_plugin.cc
index deec77c96f..56fe1e5c24 100644
--- a/src/core/ext/filters/http/http_filters_plugin.cc
+++ b/src/core/ext/filters/http/http_filters_plugin.cc
@@ -43,7 +43,7 @@ static bool is_building_http_like_transport(
 static bool maybe_add_optional_filter(grpc_channel_stack_builder* builder,
                                       void* arg) {
   if (!is_building_http_like_transport(builder)) return true;
-  optional_filter* filtarg = (optional_filter*)arg;
+  optional_filter* filtarg = static_cast<optional_filter*>(arg);
   const grpc_channel_args* channel_args =
       grpc_channel_stack_builder_get_channel_arguments(builder);
   bool enable = grpc_channel_arg_get_bool(
@@ -58,7 +58,8 @@ static bool maybe_add_required_filter(grpc_channel_stack_builder* builder,
                                       void* arg) {
   return is_building_http_like_transport(builder)
              ? grpc_channel_stack_builder_prepend_filter(
-                   builder, (const grpc_channel_filter*)arg, nullptr, nullptr)
+                   builder, static_cast<const grpc_channel_filter*>(arg),
+                   nullptr, nullptr)
              : true;
 }
 
diff --git a/src/core/ext/filters/http/message_compress/message_compress_filter.cc b/src/core/ext/filters/http/message_compress/message_compress_filter.cc
index 408301467c..73220a0ea1 100644
--- a/src/core/ext/filters/http/message_compress/message_compress_filter.cc
+++ b/src/core/ext/filters/http/message_compress/message_compress_filter.cc
@@ -80,8 +80,8 @@ struct channel_data {
 
 static bool skip_compression(grpc_call_element* elem, uint32_t flags,
                              bool has_compression_algorithm) {
-  call_data* calld = (call_data*)elem->call_data;
-  channel_data* channeld = (channel_data*)elem->channel_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
+  channel_data* channeld = static_cast<channel_data*>(elem->channel_data);
 
   if (flags & (GRPC_WRITE_NO_COMPRESS | GRPC_WRITE_INTERNAL_COMPRESS)) {
     return true;
@@ -103,8 +103,8 @@ static grpc_error* process_send_initial_metadata(
 static grpc_error* process_send_initial_metadata(
     grpc_call_element* elem, grpc_metadata_batch* initial_metadata,
     bool* has_compression_algorithm) {
-  call_data* calld = (call_data*)elem->call_data;
-  channel_data* channeld = (channel_data*)elem->channel_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
+  channel_data* channeld = static_cast<channel_data*>(elem->channel_data);
   *has_compression_algorithm = false;
   grpc_compression_algorithm compression_algorithm;
   grpc_stream_compression_algorithm stream_compression_algorithm =
@@ -194,15 +194,15 @@ static grpc_error* process_send_initial_metadata(
 }
 
 static void send_message_on_complete(void* arg, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)arg;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(arg);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   grpc_slice_buffer_reset_and_unref_internal(&calld->slices);
   GRPC_CLOSURE_RUN(calld->original_send_message_on_complete,
                    GRPC_ERROR_REF(error));
 }
 
 static void send_message_batch_continue(grpc_call_element* elem) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   // Note: The call to grpc_call_next_op() results in yielding the
   // call combiner, so we need to clear calld->send_message_batch
   // before we do that.
@@ -213,7 +213,7 @@ static void send_message_batch_continue(grpc_call_element* elem) {
 }
 
 static void finish_send_message(grpc_call_element* elem) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   // Compress the data if appropriate.
   grpc_slice_buffer tmp;
   grpc_slice_buffer_init(&tmp);
@@ -226,7 +226,8 @@ static void finish_send_message(grpc_call_element* elem) {
       const char* algo_name;
       const size_t before_size = calld->slices.length;
       const size_t after_size = tmp.length;
-      const float savings_ratio = 1.0f - (float)after_size / (float)before_size;
+      const float savings_ratio = 1.0f - static_cast<float>(after_size) /
+                                             static_cast<float>(before_size);
       GPR_ASSERT(grpc_message_compression_algorithm_name(
           calld->message_compression_algorithm, &algo_name));
       gpr_log(GPR_DEBUG,
@@ -264,7 +265,7 @@ static void finish_send_message(grpc_call_element* elem) {
 
 static void fail_send_message_batch_in_call_combiner(void* arg,
                                                      grpc_error* error) {
-  call_data* calld = (call_data*)arg;
+  call_data* calld = static_cast<call_data*>(arg);
   if (calld->send_message_batch != nullptr) {
     grpc_transport_stream_op_batch_finish_with_failure(
         calld->send_message_batch, GRPC_ERROR_REF(error), calld->call_combiner);
@@ -289,10 +290,10 @@ static grpc_error* pull_slice_from_send_message(call_data* calld) {
 // an async call to grpc_byte_stream_next() has been started, which will
 // eventually result in calling on_send_message_next_done().
 static void continue_reading_send_message(grpc_call_element* elem) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   while (grpc_byte_stream_next(
-      calld->send_message_batch->payload->send_message.send_message, ~(size_t)0,
-      &calld->on_send_message_next_done)) {
+      calld->send_message_batch->payload->send_message.send_message,
+      ~static_cast<size_t>(0), &calld->on_send_message_next_done)) {
     grpc_error* error = pull_slice_from_send_message(calld);
     if (error != GRPC_ERROR_NONE) {
       // Closure callback; does not take ownership of error.
@@ -310,8 +311,8 @@ static void continue_reading_send_message(grpc_call_element* elem) {
 
 // Async callback for grpc_byte_stream_next().
 static void on_send_message_next_done(void* arg, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)arg;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(arg);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (error != GRPC_ERROR_NONE) {
     // Closure callback; does not take ownership of error.
     fail_send_message_batch_in_call_combiner(calld, error);
@@ -333,8 +334,8 @@ static void on_send_message_next_done(void* arg, grpc_error* error) {
 }
 
 static void start_send_message_batch(void* arg, grpc_error* unused) {
-  grpc_call_element* elem = (grpc_call_element*)arg;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(arg);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (skip_compression(
           elem,
           calld->send_message_batch->payload->send_message.send_message->flags,
@@ -348,7 +349,7 @@ static void start_send_message_batch(void* arg, grpc_error* unused) {
 static void compress_start_transport_stream_op_batch(
     grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
   GPR_TIMER_SCOPE("compress_start_transport_stream_op_batch", 0);
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   // Handle cancel_stream.
   if (batch->cancel_stream) {
     GRPC_ERROR_UNREF(calld->cancel_error);
@@ -424,7 +425,7 @@ static void compress_start_transport_stream_op_batch(
 /* Constructor for call_data */
 static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   calld->call_combiner = args->call_combiner;
   calld->cancel_error = GRPC_ERROR_NONE;
   grpc_slice_buffer_init(&calld->slices);
@@ -441,7 +442,7 @@ static grpc_error* init_call_elem(grpc_call_element* elem,
 static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   grpc_slice_buffer_destroy_internal(&calld->slices);
   GRPC_ERROR_UNREF(calld->cancel_error);
 }
@@ -449,7 +450,7 @@ static void destroy_call_elem(grpc_call_element* elem,
 /* Constructor for channel_data */
 static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
-  channel_data* channeld = (channel_data*)elem->channel_data;
+  channel_data* channeld = static_cast<channel_data*>(elem->channel_data);
 
   channeld->enabled_algorithms_bitset =
       grpc_channel_args_compression_algorithm_get_states(args->channel_args);
diff --git a/src/core/ext/filters/http/server/http_server_filter.cc b/src/core/ext/filters/http/server/http_server_filter.cc
index 6ea942f053..63bc2bd59f 100644
--- a/src/core/ext/filters/http/server/http_server_filter.cc
+++ b/src/core/ext/filters/http/server/http_server_filter.cc
@@ -95,7 +95,7 @@ static void add_error(const char* error_name, grpc_error** cumulative,
 
 static grpc_error* server_filter_incoming_metadata(grpc_call_element* elem,
                                                    grpc_metadata_batch* b) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   grpc_error* error = GRPC_ERROR_NONE;
   static const char* error_name = "Failed processing incoming headers";
 
@@ -204,7 +204,7 @@ static grpc_error* server_filter_incoming_metadata(grpc_call_element* elem,
      * query parameter which is base64 encoded request payload. */
     const char k_query_separator = '?';
     grpc_slice path_slice = GRPC_MDVALUE(b->idx.named.path->md);
-    uint8_t* path_ptr = (uint8_t*)GRPC_SLICE_START_PTR(path_slice);
+    uint8_t* path_ptr = GRPC_SLICE_START_PTR(path_slice);
     size_t path_length = GRPC_SLICE_LENGTH(path_slice);
     /* offset of the character '?' */
     size_t offset = 0;
@@ -224,10 +224,11 @@ static grpc_error* server_filter_incoming_metadata(grpc_call_element* elem,
 
       /* decode payload from query and add to the slice buffer to be returned */
       const int k_url_safe = 1;
-      grpc_slice_buffer_add(&calld->read_slice_buffer,
-                            grpc_base64_decode_with_len(
-                                (const char*)GRPC_SLICE_START_PTR(query_slice),
-                                GRPC_SLICE_LENGTH(query_slice), k_url_safe));
+      grpc_slice_buffer_add(
+          &calld->read_slice_buffer,
+          grpc_base64_decode_with_len(
+              reinterpret_cast<const char*> GRPC_SLICE_START_PTR(query_slice),
+              GRPC_SLICE_LENGTH(query_slice), k_url_safe));
       grpc_slice_buffer_stream_init(&calld->read_stream,
                                     &calld->read_slice_buffer, 0);
       calld->seen_path_with_query = true;
@@ -262,8 +263,8 @@ static grpc_error* server_filter_incoming_metadata(grpc_call_element* elem,
 }
 
 static void hs_on_recv(void* user_data, grpc_error* err) {
-  grpc_call_element* elem = (grpc_call_element*)user_data;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(user_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (err == GRPC_ERROR_NONE) {
     err = server_filter_incoming_metadata(elem, calld->recv_initial_metadata);
   } else {
@@ -273,13 +274,14 @@ static void hs_on_recv(void* user_data, grpc_error* err) {
 }
 
 static void hs_on_complete(void* user_data, grpc_error* err) {
-  grpc_call_element* elem = (grpc_call_element*)user_data;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(user_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   /* Call recv_message_ready if we got the payload via the path field */
   if (calld->seen_path_with_query && calld->recv_message_ready != nullptr) {
-    *calld->pp_recv_message = calld->payload_bin_delivered
-                                  ? nullptr
-                                  : (grpc_byte_stream*)&calld->read_stream;
+    *calld->pp_recv_message =
+        calld->payload_bin_delivered
+            ? nullptr
+            : reinterpret_cast<grpc_byte_stream*>(&calld->read_stream);
     // Re-enter call combiner for recv_message_ready, since the surface
     // code will release the call combiner for each callback it receives.
     GRPC_CALL_COMBINER_START(calld->call_combiner, calld->recv_message_ready,
@@ -292,8 +294,8 @@ static void hs_on_complete(void* user_data, grpc_error* err) {
 }
 
 static void hs_recv_message_ready(void* user_data, grpc_error* err) {
-  grpc_call_element* elem = (grpc_call_element*)user_data;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(user_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (calld->seen_path_with_query) {
     // Do nothing. This is probably a GET request, and payload will be
     // returned in hs_on_complete callback.
@@ -309,7 +311,7 @@ static void hs_recv_message_ready(void* user_data, grpc_error* err) {
 static grpc_error* hs_mutate_op(grpc_call_element* elem,
                                 grpc_transport_stream_op_batch* op) {
   /* grab pointers to our data from the call element */
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
 
   if (op->send_initial_metadata) {
     grpc_error* error = GRPC_ERROR_NONE;
@@ -368,7 +370,7 @@ static grpc_error* hs_mutate_op(grpc_call_element* elem,
 static void hs_start_transport_stream_op_batch(
     grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   GPR_TIMER_SCOPE("hs_start_transport_stream_op_batch", 0);
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   grpc_error* error = hs_mutate_op(elem, op);
   if (error != GRPC_ERROR_NONE) {
     grpc_transport_stream_op_batch_finish_with_failure(op, error,
@@ -382,7 +384,7 @@ static void hs_start_transport_stream_op_batch(
 static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
   /* grab pointers to our data from the call element */
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   /* initialize members */
   calld->call_combiner = args->call_combiner;
   GRPC_CLOSURE_INIT(&calld->hs_on_recv, hs_on_recv, elem,
@@ -399,7 +401,7 @@ static grpc_error* init_call_elem(grpc_call_element* elem,
 static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   grpc_slice_buffer_destroy_internal(&calld->read_slice_buffer);
 }
 
diff --git a/src/core/ext/filters/load_reporting/server_load_reporting_filter.cc b/src/core/ext/filters/load_reporting/server_load_reporting_filter.cc
index 4c87d9755e..79b144a6eb 100644
--- a/src/core/ext/filters/load_reporting/server_load_reporting_filter.cc
+++ b/src/core/ext/filters/load_reporting/server_load_reporting_filter.cc
@@ -57,8 +57,8 @@ struct channel_data {
 }  // namespace
 
 static void on_initial_md_ready(void* user_data, grpc_error* err) {
-  grpc_call_element* elem = (grpc_call_element*)user_data;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(user_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
 
   if (err == GRPC_ERROR_NONE) {
     if (calld->recv_initial_metadata->idx.named.path != nullptr) {
@@ -88,7 +88,7 @@ static void on_initial_md_ready(void* user_data, grpc_error* err) {
 /* Constructor for call_data */
 static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   calld->id = (intptr_t)args->call_stack;
   GRPC_CLOSURE_INIT(&calld->on_initial_md_ready, on_initial_md_ready, elem,
                     grpc_schedule_on_exec_ctx);
@@ -111,7 +111,7 @@ static grpc_error* init_call_elem(grpc_call_element* elem,
 static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
 
   /* TODO(dgq): do something with the data
   channel_data *chand = elem->channel_data;
@@ -140,7 +140,7 @@ static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   GPR_ASSERT(!args->is_last);
 
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   chand->id = (intptr_t)args->channel_stack;
 
   /* TODO(dgq): do something with the data
@@ -173,8 +173,8 @@ static void destroy_channel_elem(grpc_channel_element* elem) {
 
 static grpc_filtered_mdelem lr_trailing_md_filter(void* user_data,
                                                   grpc_mdelem md) {
-  grpc_call_element* elem = (grpc_call_element*)user_data;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(user_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (grpc_slice_eq(GRPC_MDKEY(md), GRPC_MDSTR_LB_COST_BIN)) {
     calld->trailing_md_string = GRPC_MDVALUE(md);
     return GRPC_FILTERED_REMOVE();
@@ -185,7 +185,7 @@ static grpc_filtered_mdelem lr_trailing_md_filter(void* user_data,
 static void lr_start_transport_stream_op_batch(
     grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
   GPR_TIMER_SCOPE("lr_start_transport_stream_op_batch", 0);
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
 
   if (op->recv_initial_metadata) {
     /* substitute our callback for the higher callback */
diff --git a/src/core/ext/filters/load_reporting/server_load_reporting_plugin.cc b/src/core/ext/filters/load_reporting/server_load_reporting_plugin.cc
index 9d1dfcbb4c..667c0c56ef 100644
--- a/src/core/ext/filters/load_reporting/server_load_reporting_plugin.cc
+++ b/src/core/ext/filters/load_reporting/server_load_reporting_plugin.cc
@@ -41,7 +41,8 @@ static bool maybe_add_server_load_reporting_filter(
     grpc_channel_stack_builder* builder, void* arg) {
   const grpc_channel_args* args =
       grpc_channel_stack_builder_get_channel_arguments(builder);
-  const grpc_channel_filter* filter = (const grpc_channel_filter*)arg;
+  const grpc_channel_filter* filter =
+      static_cast<const grpc_channel_filter*>(arg);
   grpc_channel_stack_builder_iterator* it =
       grpc_channel_stack_builder_iterator_find(builder, filter->name);
   const bool already_has_load_reporting_filter =
diff --git a/src/core/ext/filters/max_age/max_age_filter.cc b/src/core/ext/filters/max_age/max_age_filter.cc
index a3f9780f3f..abb9d69036 100644
--- a/src/core/ext/filters/max_age/max_age_filter.cc
+++ b/src/core/ext/filters/max_age/max_age_filter.cc
@@ -206,7 +206,7 @@ static void decrease_call_count(channel_data* chand) {
 }
 
 static void start_max_idle_timer_after_init(void* arg, grpc_error* error) {
-  channel_data* chand = (channel_data*)arg;
+  channel_data* chand = static_cast<channel_data*>(arg);
   /* Decrease call_count. If there are no active calls at this time,
      max_idle_timer will start here. If the number of active calls is not 0,
      max_idle_timer will start after all the active calls end. */
@@ -216,7 +216,7 @@ static void start_max_idle_timer_after_init(void* arg, grpc_error* error) {
 }
 
 static void start_max_age_timer_after_init(void* arg, grpc_error* error) {
-  channel_data* chand = (channel_data*)arg;
+  channel_data* chand = static_cast<channel_data*>(arg);
   gpr_mu_lock(&chand->max_age_timer_mu);
   chand->max_age_timer_pending = true;
   GRPC_CHANNEL_STACK_REF(chand->channel_stack, "max_age max_age_timer");
@@ -234,7 +234,7 @@ static void start_max_age_timer_after_init(void* arg, grpc_error* error) {
 
 static void start_max_age_grace_timer_after_goaway_op(void* arg,
                                                       grpc_error* error) {
-  channel_data* chand = (channel_data*)arg;
+  channel_data* chand = static_cast<channel_data*>(arg);
   gpr_mu_lock(&chand->max_age_timer_mu);
   chand->max_age_grace_timer_pending = true;
   GRPC_CHANNEL_STACK_REF(chand->channel_stack, "max_age max_age_grace_timer");
@@ -262,7 +262,7 @@ static void close_max_idle_channel(channel_data* chand) {
 }
 
 static void max_idle_timer_cb(void* arg, grpc_error* error) {
-  channel_data* chand = (channel_data*)arg;
+  channel_data* chand = static_cast<channel_data*>(arg);
   if (error == GRPC_ERROR_NONE) {
     bool try_again = true;
     while (try_again) {
@@ -285,8 +285,8 @@ static void max_idle_timer_cb(void* arg, grpc_error* error) {
           GRPC_CHANNEL_STACK_REF(chand->channel_stack,
                                  "max_age max_idle_timer");
           grpc_timer_init(&chand->max_idle_timer,
-                          (grpc_millis)gpr_atm_no_barrier_load(
-                              &chand->last_enter_idle_time_millis) +
+                          static_cast<grpc_millis>(gpr_atm_no_barrier_load(
+                              &chand->last_enter_idle_time_millis)) +
                               chand->max_connection_idle,
                           &chand->max_idle_timer_cb);
           /* idle_state may have already been set to
@@ -306,7 +306,7 @@ static void max_idle_timer_cb(void* arg, grpc_error* error) {
 }
 
 static void close_max_age_channel(void* arg, grpc_error* error) {
-  channel_data* chand = (channel_data*)arg;
+  channel_data* chand = static_cast<channel_data*>(arg);
   gpr_mu_lock(&chand->max_age_timer_mu);
   chand->max_age_timer_pending = false;
   gpr_mu_unlock(&chand->max_age_timer_mu);
@@ -328,7 +328,7 @@ static void close_max_age_channel(void* arg, grpc_error* error) {
 }
 
 static void force_close_max_age_channel(void* arg, grpc_error* error) {
-  channel_data* chand = (channel_data*)arg;
+  channel_data* chand = static_cast<channel_data*>(arg);
   gpr_mu_lock(&chand->max_age_timer_mu);
   chand->max_age_grace_timer_pending = false;
   gpr_mu_unlock(&chand->max_age_timer_mu);
@@ -346,7 +346,7 @@ static void force_close_max_age_channel(void* arg, grpc_error* error) {
 }
 
 static void channel_connectivity_changed(void* arg, grpc_error* error) {
-  channel_data* chand = (channel_data*)arg;
+  channel_data* chand = static_cast<channel_data*>(arg);
   if (chand->connectivity_state != GRPC_CHANNEL_SHUTDOWN) {
     grpc_transport_op* op = grpc_make_transport_op(nullptr);
     op->on_connectivity_state_change = &chand->channel_connectivity_changed;
@@ -384,15 +384,15 @@ add_random_max_connection_age_jitter_and_convert_to_grpc_millis(int value) {
   double result = multiplier * value;
   /* INT_MAX - 0.5 converts the value to float, so that result will not be
      cast to int implicitly before the comparison. */
-  return result > ((double)GRPC_MILLIS_INF_FUTURE) - 0.5
+  return result > (static_cast<double>(GRPC_MILLIS_INF_FUTURE)) - 0.5
              ? GRPC_MILLIS_INF_FUTURE
-             : (grpc_millis)result;
+             : static_cast<grpc_millis>(result);
 }
 
 /* Constructor for call_data. */
 static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   increase_call_count(chand);
   return GRPC_ERROR_NONE;
 }
@@ -401,14 +401,14 @@ static grpc_error* init_call_elem(grpc_call_element* elem,
 static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   decrease_call_count(chand);
 }
 
 /* Constructor for channel_data. */
 static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   gpr_mu_init(&chand->max_age_timer_mu);
   chand->max_age_timer_pending = false;
   chand->max_age_grace_timer_pending = false;
diff --git a/src/core/ext/filters/message_size/message_size_filter.cc b/src/core/ext/filters/message_size/message_size_filter.cc
index 8d76c4a837..49d9ae60ae 100644
--- a/src/core/ext/filters/message_size/message_size_filter.cc
+++ b/src/core/ext/filters/message_size/message_size_filter.cc
@@ -42,14 +42,14 @@ typedef struct {
 
 static void* refcounted_message_size_limits_ref(void* value) {
   refcounted_message_size_limits* limits =
-      (refcounted_message_size_limits*)value;
+      static_cast<refcounted_message_size_limits*>(value);
   gpr_ref(&limits->refs);
   return value;
 }
 
 static void refcounted_message_size_limits_unref(void* value) {
   refcounted_message_size_limits* limits =
-      (refcounted_message_size_limits*)value;
+      static_cast<refcounted_message_size_limits*>(value);
   if (gpr_unref(&limits->refs)) {
     gpr_free(value);
   }
@@ -78,8 +78,8 @@ static void* refcounted_message_size_limits_create_from_json(
     }
   }
   refcounted_message_size_limits* value =
-      (refcounted_message_size_limits*)gpr_malloc(
-          sizeof(refcounted_message_size_limits));
+      static_cast<refcounted_message_size_limits*>(
+          gpr_malloc(sizeof(refcounted_message_size_limits)));
   gpr_ref_init(&value->refs, 1);
   value->limits.max_send_size = max_request_message_bytes;
   value->limits.max_recv_size = max_response_message_bytes;
@@ -110,10 +110,11 @@ struct channel_data {
 // Callback invoked when we receive a message.  Here we check the max
 // receive message size.
 static void recv_message_ready(void* user_data, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)user_data;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(user_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (*calld->recv_message != nullptr && calld->limits.max_recv_size >= 0 &&
-      (*calld->recv_message)->length > (size_t)calld->limits.max_recv_size) {
+      (*calld->recv_message)->length >
+          static_cast<size_t>(calld->limits.max_recv_size)) {
     char* message_string;
     gpr_asprintf(&message_string,
                  "Received message larger than max (%u vs. %d)",
@@ -138,11 +139,11 @@ static void recv_message_ready(void* user_data, grpc_error* error) {
 // Start transport stream op.
 static void start_transport_stream_op_batch(
     grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   // Check max send message size.
   if (op->send_message && calld->limits.max_send_size >= 0 &&
       op->payload->send_message.send_message->length >
-          (size_t)calld->limits.max_send_size) {
+          static_cast<size_t>(calld->limits.max_send_size)) {
     char* message_string;
     gpr_asprintf(&message_string, "Sent message larger than max (%u vs. %d)",
                  op->payload->send_message.send_message->length,
@@ -170,8 +171,8 @@ static void start_transport_stream_op_batch(
 // Constructor for call_data.
 static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
-  channel_data* chand = (channel_data*)elem->channel_data;
-  call_data* calld = (call_data*)elem->call_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   calld->call_combiner = args->call_combiner;
   calld->next_recv_message_ready = nullptr;
   GRPC_CLOSURE_INIT(&calld->recv_message_ready, recv_message_ready, elem,
@@ -183,8 +184,9 @@ static grpc_error* init_call_elem(grpc_call_element* elem,
   calld->limits = chand->limits;
   if (chand->method_limit_table != nullptr) {
     refcounted_message_size_limits* limits =
-        (refcounted_message_size_limits*)grpc_method_config_table_get(
-            chand->method_limit_table, args->path);
+        static_cast<refcounted_message_size_limits*>(
+            grpc_method_config_table_get(chand->method_limit_table,
+                                         args->path));
     if (limits != nullptr) {
       if (limits->limits.max_send_size >= 0 &&
           (limits->limits.max_send_size < calld->limits.max_send_size ||
@@ -242,7 +244,7 @@ message_size_limits get_message_size_limits(
 static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   GPR_ASSERT(!args->is_last);
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   chand->limits = get_message_size_limits(args->channel_args);
   // Get method config table from channel args.
   const grpc_arg* channel_arg =
@@ -265,7 +267,7 @@ static grpc_error* init_channel_elem(grpc_channel_element* elem,
 
 // Destructor for channel_data.
 static void destroy_channel_elem(grpc_channel_element* elem) {
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   grpc_slice_hash_table_unref(chand->method_limit_table);
 }
 
diff --git a/src/core/ext/filters/workarounds/workaround_cronet_compression_filter.cc b/src/core/ext/filters/workarounds/workaround_cronet_compression_filter.cc
index 88bb8c71cc..3092ed2056 100644
--- a/src/core/ext/filters/workarounds/workaround_cronet_compression_filter.cc
+++ b/src/core/ext/filters/workarounds/workaround_cronet_compression_filter.cc
@@ -53,8 +53,8 @@ static bool get_user_agent_mdelem(const grpc_metadata_batch* batch,
 
 // Callback invoked when we receive an initial metadata.
 static void recv_initial_metadata_ready(void* user_data, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)user_data;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(user_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
 
   if (GRPC_ERROR_NONE == error) {
     grpc_mdelem md;
@@ -75,7 +75,7 @@ static void recv_initial_metadata_ready(void* user_data, grpc_error* error) {
 // Start transport stream op.
 static void start_transport_stream_op_batch(
     grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
 
   // Inject callback for receiving initial metadata
   if (op->recv_initial_metadata) {
@@ -102,7 +102,7 @@ static void start_transport_stream_op_batch(
 // Constructor for call_data.
 static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   calld->next_recv_initial_metadata_ready = nullptr;
   calld->workaround_active = false;
   GRPC_CLOSURE_INIT(&calld->recv_initial_metadata_ready,
diff --git a/src/core/ext/filters/workarounds/workaround_utils.cc b/src/core/ext/filters/workarounds/workaround_utils.cc
index 9d76582ea2..850ed75ec9 100644
--- a/src/core/ext/filters/workarounds/workaround_utils.cc
+++ b/src/core/ext/filters/workarounds/workaround_utils.cc
@@ -27,14 +27,14 @@ static void destroy_user_agent_md(void* user_agent_md) {
 
 grpc_workaround_user_agent_md* grpc_parse_user_agent(grpc_mdelem md) {
   grpc_workaround_user_agent_md* user_agent_md =
-      (grpc_workaround_user_agent_md*)grpc_mdelem_get_user_data(
-          md, destroy_user_agent_md);
+      static_cast<grpc_workaround_user_agent_md*>(
+          grpc_mdelem_get_user_data(md, destroy_user_agent_md));
 
   if (nullptr != user_agent_md) {
     return user_agent_md;
   }
-  user_agent_md = (grpc_workaround_user_agent_md*)gpr_malloc(
-      sizeof(grpc_workaround_user_agent_md));
+  user_agent_md = static_cast<grpc_workaround_user_agent_md*>(
+      gpr_malloc(sizeof(grpc_workaround_user_agent_md)));
   for (int i = 0; i < GRPC_MAX_WORKAROUND_ID; i++) {
     if (ua_parser[i]) {
       user_agent_md->workaround_active[i] = ua_parser[i](md);
diff --git a/src/core/ext/transport/chttp2/client/chttp2_connector.cc b/src/core/ext/transport/chttp2/client/chttp2_connector.cc
index db5962e7fd..7eb9ebc27e 100644
--- a/src/core/ext/transport/chttp2/client/chttp2_connector.cc
+++ b/src/core/ext/transport/chttp2/client/chttp2_connector.cc
@@ -57,12 +57,12 @@ typedef struct {
 } chttp2_connector;
 
 static void chttp2_connector_ref(grpc_connector* con) {
-  chttp2_connector* c = (chttp2_connector*)con;
+  chttp2_connector* c = reinterpret_cast<chttp2_connector*>(con);
   gpr_ref(&c->refs);
 }
 
 static void chttp2_connector_unref(grpc_connector* con) {
-  chttp2_connector* c = (chttp2_connector*)con;
+  chttp2_connector* c = reinterpret_cast<chttp2_connector*>(con);
   if (gpr_unref(&c->refs)) {
     gpr_mu_destroy(&c->mu);
     // If handshaking is not yet in progress, destroy the endpoint.
@@ -73,7 +73,7 @@ static void chttp2_connector_unref(grpc_connector* con) {
 }
 
 static void chttp2_connector_shutdown(grpc_connector* con, grpc_error* why) {
-  chttp2_connector* c = (chttp2_connector*)con;
+  chttp2_connector* c = reinterpret_cast<chttp2_connector*>(con);
   gpr_mu_lock(&c->mu);
   c->shutdown = true;
   if (c->handshake_mgr != nullptr) {
@@ -89,8 +89,8 @@ static void chttp2_connector_shutdown(grpc_connector* con, grpc_error* why) {
 }
 
 static void on_handshake_done(void* arg, grpc_error* error) {
-  grpc_handshaker_args* args = (grpc_handshaker_args*)arg;
-  chttp2_connector* c = (chttp2_connector*)args->user_data;
+  grpc_handshaker_args* args = static_cast<grpc_handshaker_args*>(arg);
+  chttp2_connector* c = static_cast<chttp2_connector*>(args->user_data);
   gpr_mu_lock(&c->mu);
   if (error != GRPC_ERROR_NONE || c->shutdown) {
     if (error == GRPC_ERROR_NONE) {
@@ -150,7 +150,7 @@ static void on_handshake_done(void* arg, grpc_error* error) {
   grpc_handshake_manager_destroy(c->handshake_mgr);
   c->handshake_mgr = nullptr;
   gpr_mu_unlock(&c->mu);
-  chttp2_connector_unref((grpc_connector*)c);
+  chttp2_connector_unref(reinterpret_cast<grpc_connector*>(c));
 }
 
 static void start_handshake_locked(chttp2_connector* c) {
@@ -166,7 +166,7 @@ static void start_handshake_locked(chttp2_connector* c) {
 }
 
 static void connected(void* arg, grpc_error* error) {
-  chttp2_connector* c = (chttp2_connector*)arg;
+  chttp2_connector* c = static_cast<chttp2_connector*>(arg);
   gpr_mu_lock(&c->mu);
   GPR_ASSERT(c->connecting);
   c->connecting = false;
@@ -184,7 +184,7 @@ static void connected(void* arg, grpc_error* error) {
       grpc_endpoint_shutdown(c->endpoint, GRPC_ERROR_REF(error));
     }
     gpr_mu_unlock(&c->mu);
-    chttp2_connector_unref((grpc_connector*)arg);
+    chttp2_connector_unref(static_cast<grpc_connector*>(arg));
   } else {
     GPR_ASSERT(c->endpoint != nullptr);
     start_handshake_locked(c);
@@ -196,7 +196,7 @@ static void chttp2_connector_connect(grpc_connector* con,
                                      const grpc_connect_in_args* args,
                                      grpc_connect_out_args* result,
                                      grpc_closure* notify) {
-  chttp2_connector* c = (chttp2_connector*)con;
+  chttp2_connector* c = reinterpret_cast<chttp2_connector*>(con);
   grpc_resolved_address addr;
   grpc_get_subchannel_address_arg(args->channel_args, &addr);
   gpr_mu_lock(&c->mu);
@@ -219,7 +219,7 @@ static const grpc_connector_vtable chttp2_connector_vtable = {
     chttp2_connector_connect};
 
 grpc_connector* grpc_chttp2_connector_create() {
-  chttp2_connector* c = (chttp2_connector*)gpr_zalloc(sizeof(*c));
+  chttp2_connector* c = static_cast<chttp2_connector*>(gpr_zalloc(sizeof(*c)));
   c->base.vtable = &chttp2_connector_vtable;
   gpr_mu_init(&c->mu);
   gpr_ref_init(&c->refs, 1);
diff --git a/src/core/ext/transport/chttp2/client/secure/secure_channel_create.cc b/src/core/ext/transport/chttp2/client/secure/secure_channel_create.cc
index d39c362cd3..8c4025ed13 100644
--- a/src/core/ext/transport/chttp2/client/secure/secure_channel_create.cc
+++ b/src/core/ext/transport/chttp2/client/secure/secure_channel_create.cc
@@ -86,8 +86,8 @@ static grpc_subchannel_args* get_secure_naming_subchannel_args(
     if (target_uri->path[0] != '\0') {  // "path" may be empty
       const grpc_slice key = grpc_slice_from_static_string(
           target_uri->path[0] == '/' ? target_uri->path + 1 : target_uri->path);
-      const char* value =
-          (const char*)grpc_slice_hash_table_get(targets_info, key);
+      const char* value = static_cast<const char*>(
+          grpc_slice_hash_table_get(targets_info, key));
       if (value != nullptr) target_name_to_check = gpr_strdup(value);
       grpc_slice_unref_internal(key);
     }
@@ -129,7 +129,7 @@ static grpc_subchannel_args* get_secure_naming_subchannel_args(
     grpc_channel_args_destroy(new_args_from_connector);
   }
   grpc_subchannel_args* final_sc_args =
-      (grpc_subchannel_args*)gpr_malloc(sizeof(*final_sc_args));
+      static_cast<grpc_subchannel_args*>(gpr_malloc(sizeof(*final_sc_args)));
   memcpy(final_sc_args, args, sizeof(*args));
   final_sc_args->args = new_args;
   return final_sc_args;
@@ -148,7 +148,8 @@ static grpc_subchannel* client_channel_factory_create_subchannel(
   grpc_connector* connector = grpc_chttp2_connector_create();
   grpc_subchannel* s = grpc_subchannel_create(connector, subchannel_args);
   grpc_connector_unref(connector);
-  grpc_channel_args_destroy((grpc_channel_args*)subchannel_args->args);
+  grpc_channel_args_destroy(
+      const_cast<grpc_channel_args*>(subchannel_args->args));
   gpr_free(subchannel_args);
   return s;
 }
diff --git a/src/core/ext/transport/chttp2/server/chttp2_server.cc b/src/core/ext/transport/chttp2/server/chttp2_server.cc
index bab46f8f30..90b2ee1af9 100644
--- a/src/core/ext/transport/chttp2/server/chttp2_server.cc
+++ b/src/core/ext/transport/chttp2/server/chttp2_server.cc
@@ -79,7 +79,8 @@ static void server_connection_state_unref(
 }
 
 static void on_timeout(void* arg, grpc_error* error) {
-  server_connection_state* connection_state = (server_connection_state*)arg;
+  server_connection_state* connection_state =
+      static_cast<server_connection_state*>(arg);
   // Note that we may be called with GRPC_ERROR_NONE when the timer fires
   // or with an error indicating that the timer system is being shut down.
   if (error != GRPC_ERROR_CANCELLED) {
@@ -92,7 +93,8 @@ static void on_timeout(void* arg, grpc_error* error) {
 }
 
 static void on_receive_settings(void* arg, grpc_error* error) {
-  server_connection_state* connection_state = (server_connection_state*)arg;
+  server_connection_state* connection_state =
+      static_cast<server_connection_state*>(arg);
   if (error == GRPC_ERROR_NONE) {
     grpc_timer_cancel(&connection_state->timer);
   }
@@ -100,9 +102,9 @@ static void on_receive_settings(void* arg, grpc_error* error) {
 }
 
 static void on_handshake_done(void* arg, grpc_error* error) {
-  grpc_handshaker_args* args = (grpc_handshaker_args*)arg;
+  grpc_handshaker_args* args = static_cast<grpc_handshaker_args*>(arg);
   server_connection_state* connection_state =
-      (server_connection_state*)args->user_data;
+      static_cast<server_connection_state*>(args->user_data);
   gpr_mu_lock(&connection_state->svr_state->mu);
   if (error != GRPC_ERROR_NONE || connection_state->svr_state->shutdown) {
     const char* error_str = grpc_error_string(error);
@@ -132,7 +134,8 @@ static void on_handshake_done(void* arg, grpc_error* error) {
           connection_state->accepting_pollset, args->args);
       // Use notify_on_receive_settings callback to enforce the
       // handshake deadline.
-      connection_state->transport = (grpc_chttp2_transport*)transport;
+      connection_state->transport =
+          reinterpret_cast<grpc_chttp2_transport*>(transport);
       gpr_ref(&connection_state->refs);
       GRPC_CLOSURE_INIT(&connection_state->on_receive_settings,
                         on_receive_settings, connection_state,
@@ -162,7 +165,7 @@ static void on_handshake_done(void* arg, grpc_error* error) {
 static void on_accept(void* arg, grpc_endpoint* tcp,
                       grpc_pollset* accepting_pollset,
                       grpc_tcp_server_acceptor* acceptor) {
-  server_state* state = (server_state*)arg;
+  server_state* state = static_cast<server_state*>(arg);
   gpr_mu_lock(&state->mu);
   if (state->shutdown) {
     gpr_mu_unlock(&state->mu);
@@ -177,7 +180,8 @@ static void on_accept(void* arg, grpc_endpoint* tcp,
   gpr_mu_unlock(&state->mu);
   grpc_tcp_server_ref(state->tcp_server);
   server_connection_state* connection_state =
-      (server_connection_state*)gpr_zalloc(sizeof(*connection_state));
+      static_cast<server_connection_state*>(
+          gpr_zalloc(sizeof(*connection_state)));
   gpr_ref_init(&connection_state->refs, 1);
   connection_state->svr_state = state;
   connection_state->accepting_pollset = accepting_pollset;
@@ -201,7 +205,7 @@ static void on_accept(void* arg, grpc_endpoint* tcp,
 static void server_start_listener(grpc_server* server, void* arg,
                                   grpc_pollset** pollsets,
                                   size_t pollset_count) {
-  server_state* state = (server_state*)arg;
+  server_state* state = static_cast<server_state*>(arg);
   gpr_mu_lock(&state->mu);
   state->shutdown = false;
   gpr_mu_unlock(&state->mu);
@@ -210,7 +214,7 @@ static void server_start_listener(grpc_server* server, void* arg,
 }
 
 static void tcp_server_shutdown_complete(void* arg, grpc_error* error) {
-  server_state* state = (server_state*)arg;
+  server_state* state = static_cast<server_state*>(arg);
   /* ensure all threads have unlocked */
   gpr_mu_lock(&state->mu);
   grpc_closure* destroy_done = state->server_destroy_listener_done;
@@ -234,7 +238,7 @@ static void tcp_server_shutdown_complete(void* arg, grpc_error* error) {
    callbacks) */
 static void server_destroy_listener(grpc_server* server, void* arg,
                                     grpc_closure* destroy_done) {
-  server_state* state = (server_state*)arg;
+  server_state* state = static_cast<server_state*>(arg);
   gpr_mu_lock(&state->mu);
   state->shutdown = true;
   state->server_destroy_listener_done = destroy_done;
@@ -264,7 +268,7 @@ grpc_error* grpc_chttp2_server_add_port(grpc_server* server, const char* addr,
   if (err != GRPC_ERROR_NONE) {
     goto error;
   }
-  state = (server_state*)gpr_zalloc(sizeof(*state));
+  state = static_cast<server_state*>(gpr_zalloc(sizeof(*state)));
   GRPC_CLOSURE_INIT(&state->tcp_server_shutdown_complete,
                     tcp_server_shutdown_complete, state,
                     grpc_schedule_on_exec_ctx);
@@ -281,7 +285,7 @@ grpc_error* grpc_chttp2_server_add_port(grpc_server* server, const char* addr,
   gpr_mu_init(&state->mu);
 
   naddrs = resolved->naddrs;
-  errors = (grpc_error**)gpr_malloc(sizeof(*errors) * naddrs);
+  errors = static_cast<grpc_error**>(gpr_malloc(sizeof(*errors) * naddrs));
   for (i = 0; i < naddrs; i++) {
     errors[i] =
         grpc_tcp_server_add_port(tcp_server, &resolved->addrs[i], &port_temp);
diff --git a/src/core/ext/transport/chttp2/transport/bin_decoder.cc b/src/core/ext/transport/chttp2/transport/bin_decoder.cc
index 74778ac046..91980e6974 100644
--- a/src/core/ext/transport/chttp2/transport/bin_decoder.cc
+++ b/src/core/ext/transport/chttp2/transport/bin_decoder.cc
@@ -57,7 +57,7 @@ static bool input_is_valid(uint8_t* input_ptr, size_t length) {
       gpr_log(GPR_ERROR,
               "Base64 decoding failed, invalid character '%c' in base64 "
               "input.\n",
-              (char)(*input_ptr));
+              static_cast<char>(*input_ptr));
       return false;
     }
   }
@@ -94,7 +94,7 @@ bool grpc_base64_decode_partial(struct grpc_base64_decode_context* ctx) {
   }
 
   // Process the tail of input data
-  input_tail = (size_t)(ctx->input_end - ctx->input_cur);
+  input_tail = static_cast<size_t>(ctx->input_end - ctx->input_cur);
   if (input_tail == 4) {
     // Process the input data with pad chars
     if (ctx->input_cur[3] == '=') {
@@ -141,7 +141,7 @@ grpc_slice grpc_chttp2_base64_decode(grpc_slice input) {
             "Base64 decoding failed, input of "
             "grpc_chttp2_base64_decode has a length of %d, which is not a "
             "multiple of 4.\n",
-            (int)input_length);
+            static_cast<int>(input_length));
     return grpc_empty_slice();
   }
 
@@ -186,17 +186,18 @@ grpc_slice grpc_chttp2_base64_decode_with_length(grpc_slice input,
             "Base64 decoding failed, input of "
             "grpc_chttp2_base64_decode_with_length has a length of %d, which "
             "has a tail of 1 byte.\n",
-            (int)input_length);
+            static_cast<int>(input_length));
     grpc_slice_unref_internal(output);
     return grpc_empty_slice();
   }
 
   if (output_length > input_length / 4 * 3 + tail_xtra[input_length % 4]) {
-    gpr_log(GPR_ERROR,
-            "Base64 decoding failed, output_length %d is longer "
-            "than the max possible output length %d.\n",
-            (int)output_length,
-            (int)(input_length / 4 * 3 + tail_xtra[input_length % 4]));
+    gpr_log(
+        GPR_ERROR,
+        "Base64 decoding failed, output_length %d is longer "
+        "than the max possible output length %d.\n",
+        static_cast<int>(output_length),
+        static_cast<int>(input_length / 4 * 3 + tail_xtra[input_length % 4]));
     grpc_slice_unref_internal(output);
     return grpc_empty_slice();
   }
diff --git a/src/core/ext/transport/chttp2/transport/bin_encoder.cc b/src/core/ext/transport/chttp2/transport/bin_encoder.cc
index 09f984d7b2..e3b8adbe73 100644
--- a/src/core/ext/transport/chttp2/transport/bin_encoder.cc
+++ b/src/core/ext/transport/chttp2/transport/bin_encoder.cc
@@ -53,7 +53,7 @@ grpc_slice grpc_chttp2_base64_encode(grpc_slice input) {
   size_t output_length = input_triplets * 4 + tail_xtra[tail_case];
   grpc_slice output = GRPC_SLICE_MALLOC(output_length);
   uint8_t* in = GRPC_SLICE_START_PTR(input);
-  char* out = (char*)GRPC_SLICE_START_PTR(output);
+  char* out = reinterpret_cast<char*> GRPC_SLICE_START_PTR(output);
   size_t i;
 
   /* encode full triplets */
@@ -115,7 +115,7 @@ grpc_slice grpc_chttp2_huffman_compress(grpc_slice input) {
 
     while (temp_length > 8) {
       temp_length -= 8;
-      *out++ = (uint8_t)(temp >> temp_length);
+      *out++ = static_cast<uint8_t>(temp >> temp_length);
     }
   }
 
@@ -124,8 +124,9 @@ grpc_slice grpc_chttp2_huffman_compress(grpc_slice input) {
      * expanded form due to the "integral promotion" performed (see section
      * 3.2.1.1 of the C89 draft standard). A cast to the smaller container type
      * is then required to avoid the compiler warning */
-    *out++ = (uint8_t)((uint8_t)(temp << (8u - temp_length)) |
-                       (uint8_t)(0xffu >> temp_length));
+    *out++ =
+        static_cast<uint8_t>(static_cast<uint8_t>(temp << (8u - temp_length)) |
+                             static_cast<uint8_t>(0xffu >> temp_length));
   }
 
   GPR_ASSERT(out == GRPC_SLICE_END_PTR(output));
@@ -142,7 +143,7 @@ typedef struct {
 static void enc_flush_some(huff_out* out) {
   while (out->temp_length > 8) {
     out->temp_length -= 8;
-    *out->out++ = (uint8_t)(out->temp >> out->temp_length);
+    *out->out++ = static_cast<uint8_t>(out->temp >> out->temp_length);
   }
 }
 
@@ -150,8 +151,9 @@ static void enc_add2(huff_out* out, uint8_t a, uint8_t b) {
   b64_huff_sym sa = huff_alphabet[a];
   b64_huff_sym sb = huff_alphabet[b];
   out->temp = (out->temp << (sa.length + sb.length)) |
-              ((uint32_t)sa.bits << sb.length) | sb.bits;
-  out->temp_length += (uint32_t)sa.length + (uint32_t)sb.length;
+              (static_cast<uint32_t>(sa.bits) << sb.length) | sb.bits;
+  out->temp_length +=
+      static_cast<uint32_t>(sa.length) + static_cast<uint32_t>(sb.length);
   enc_flush_some(out);
 }
 
@@ -181,11 +183,11 @@ grpc_slice grpc_chttp2_base64_encode_and_huffman_compress(grpc_slice input) {
 
   /* encode full triplets */
   for (i = 0; i < input_triplets; i++) {
-    const uint8_t low_to_high = (uint8_t)((in[0] & 0x3) << 4);
+    const uint8_t low_to_high = static_cast<uint8_t>((in[0] & 0x3) << 4);
     const uint8_t high_to_low = in[1] >> 4;
     enc_add2(&out, in[0] >> 2, low_to_high | high_to_low);
 
-    const uint8_t a = (uint8_t)((in[1] & 0xf) << 2);
+    const uint8_t a = static_cast<uint8_t>((in[1] & 0xf) << 2);
     const uint8_t b = (in[2] >> 6);
     enc_add2(&out, a | b, in[2] & 0x3f);
     in += 3;
@@ -196,14 +198,14 @@ grpc_slice grpc_chttp2_base64_encode_and_huffman_compress(grpc_slice input) {
     case 0:
       break;
     case 1:
-      enc_add2(&out, in[0] >> 2, (uint8_t)((in[0] & 0x3) << 4));
+      enc_add2(&out, in[0] >> 2, static_cast<uint8_t>((in[0] & 0x3) << 4));
       in += 1;
       break;
     case 2: {
-      const uint8_t low_to_high = (uint8_t)((in[0] & 0x3) << 4);
+      const uint8_t low_to_high = static_cast<uint8_t>((in[0] & 0x3) << 4);
       const uint8_t high_to_low = in[1] >> 4;
       enc_add2(&out, in[0] >> 2, low_to_high | high_to_low);
-      enc_add1(&out, (uint8_t)((in[1] & 0xf) << 2));
+      enc_add1(&out, static_cast<uint8_t>((in[1] & 0xf) << 2));
       in += 2;
       break;
     }
@@ -214,8 +216,9 @@ grpc_slice grpc_chttp2_base64_encode_and_huffman_compress(grpc_slice input) {
      * expanded form due to the "integral promotion" performed (see section
      * 3.2.1.1 of the C89 draft standard). A cast to the smaller container type
      * is then required to avoid the compiler warning */
-    *out.out++ = (uint8_t)((uint8_t)(out.temp << (8u - out.temp_length)) |
-                           (uint8_t)(0xffu >> out.temp_length));
+    *out.out++ = static_cast<uint8_t>(
+        static_cast<uint8_t>(out.temp << (8u - out.temp_length)) |
+        static_cast<uint8_t>(0xffu >> out.temp_length));
   }
 
   GPR_ASSERT(out.out <= GRPC_SLICE_END_PTR(output));
diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.cc b/src/core/ext/transport/chttp2/transport/chttp2_transport.cc
index 7c35fafe36..ad8da94cb3 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.cc
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.cc
@@ -378,7 +378,7 @@ static void init_transport(grpc_chttp2_transport* t,
                     GRPC_ARG_HTTP2_INITIAL_SEQUENCE_NUMBER,
                     t->next_stream_id & 1, is_client ? "client" : "server");
           } else {
-            t->next_stream_id = (uint32_t)value;
+            t->next_stream_id = static_cast<uint32_t>(value);
           }
         }
       } else if (0 == strcmp(channel_args->args[i].key,
@@ -387,8 +387,8 @@ static void init_transport(grpc_chttp2_transport* t,
         const int value =
             grpc_channel_arg_get_integer(&channel_args->args[i], options);
         if (value >= 0) {
-          grpc_chttp2_hpack_compressor_set_max_usable_size(&t->hpack_compressor,
-                                                           (uint32_t)value);
+          grpc_chttp2_hpack_compressor_set_max_usable_size(
+              &t->hpack_compressor, static_cast<uint32_t>(value));
         }
       } else if (0 == strcmp(channel_args->args[i].key,
                              GRPC_ARG_HTTP2_MAX_PINGS_WITHOUT_DATA)) {
@@ -421,8 +421,9 @@ static void init_transport(grpc_chttp2_transport* t,
                     INT_MAX});
       } else if (0 == strcmp(channel_args->args[i].key,
                              GRPC_ARG_HTTP2_WRITE_BUFFER_SIZE)) {
-        t->write_buffer_size = (uint32_t)grpc_channel_arg_get_integer(
-            &channel_args->args[i], {0, 0, MAX_WRITE_BUFFER_SIZE});
+        t->write_buffer_size =
+            static_cast<uint32_t>(grpc_channel_arg_get_integer(
+                &channel_args->args[i], {0, 0, MAX_WRITE_BUFFER_SIZE}));
       } else if (0 ==
                  strcmp(channel_args->args[i].key, GRPC_ARG_HTTP2_BDP_PROBE)) {
         enable_bdp = grpc_channel_arg_get_bool(&channel_args->args[i], true);
@@ -447,9 +448,8 @@ static void init_transport(grpc_chttp2_transport* t,
             value == INT_MAX ? GRPC_MILLIS_INF_FUTURE : value;
       } else if (0 == strcmp(channel_args->args[i].key,
                              GRPC_ARG_KEEPALIVE_PERMIT_WITHOUT_CALLS)) {
-        t->keepalive_permit_without_calls =
-            (uint32_t)grpc_channel_arg_get_integer(&channel_args->args[i],
-                                                   {0, 0, 1});
+        t->keepalive_permit_without_calls = static_cast<uint32_t>(
+            grpc_channel_arg_get_integer(&channel_args->args[i], {0, 0, 1}));
       } else if (0 == strcmp(channel_args->args[i].key,
                              GRPC_ARG_OPTIMIZATION_TARGET)) {
         if (channel_args->args[i].type != GRPC_ARG_STRING) {
@@ -498,7 +498,7 @@ static void init_transport(grpc_chttp2_transport* t,
              GRPC_CHTTP2_SETTINGS_INITIAL_WINDOW_SIZE,
              {-1, 5, INT32_MAX},
              {true, true}}};
-        for (j = 0; j < (int)GPR_ARRAY_SIZE(settings_map); j++) {
+        for (j = 0; j < static_cast<int> GPR_ARRAY_SIZE(settings_map); j++) {
           if (0 == strcmp(channel_args->args[i].key,
                           settings_map[j].channel_arg_name)) {
             if (!settings_map[j].availability[is_client]) {
@@ -510,7 +510,7 @@ static void init_transport(grpc_chttp2_transport* t,
                   &channel_args->args[i], settings_map[j].integer_options);
               if (value >= 0) {
                 queue_setting_update(t, settings_map[j].setting_id,
-                                     (uint32_t)value);
+                                     static_cast<uint32_t>(value));
               }
             }
             break;
@@ -562,7 +562,7 @@ static void init_transport(grpc_chttp2_transport* t,
 }
 
 static void destroy_transport_locked(void* tp, grpc_error* error) {
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
+  grpc_chttp2_transport* t = static_cast<grpc_chttp2_transport*>(tp);
   t->destroying = 1;
   close_transport_locked(
       t, grpc_error_set_int(
@@ -572,7 +572,7 @@ static void destroy_transport_locked(void* tp, grpc_error* error) {
 }
 
 static void destroy_transport(grpc_transport* gt) {
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
+  grpc_chttp2_transport* t = reinterpret_cast<grpc_chttp2_transport*>(gt);
   GRPC_CLOSURE_SCHED(GRPC_CLOSURE_CREATE(destroy_transport_locked, t,
                                          grpc_combiner_scheduler(t->combiner)),
                      GRPC_ERROR_NONE);
@@ -656,8 +656,8 @@ static int init_stream(grpc_transport* gt, grpc_stream* gs,
                        grpc_stream_refcount* refcount, const void* server_data,
                        gpr_arena* arena) {
   GPR_TIMER_SCOPE("init_stream", 0);
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
-  grpc_chttp2_stream* s = (grpc_chttp2_stream*)gs;
+  grpc_chttp2_transport* t = reinterpret_cast<grpc_chttp2_transport*>(gt);
+  grpc_chttp2_stream* s = reinterpret_cast<grpc_chttp2_stream*>(gs);
 
   s->t = t;
   s->refcount = refcount;
@@ -685,7 +685,7 @@ static int init_stream(grpc_transport* gt, grpc_stream* gs,
   GRPC_CHTTP2_REF_TRANSPORT(t, "stream");
 
   if (server_data) {
-    s->id = (uint32_t)(uintptr_t)server_data;
+    s->id = static_cast<uint32_t>((uintptr_t)server_data);
     *t->accepting_stream = s;
     grpc_chttp2_stream_map_add(&t->stream_map, s->id, s);
     post_destructive_reclaimer(t);
@@ -705,7 +705,7 @@ static int init_stream(grpc_transport* gt, grpc_stream* gs,
 
 static void destroy_stream_locked(void* sp, grpc_error* error) {
   GPR_TIMER_SCOPE("destroy_stream", 0);
-  grpc_chttp2_stream* s = (grpc_chttp2_stream*)sp;
+  grpc_chttp2_stream* s = static_cast<grpc_chttp2_stream*>(sp);
   grpc_chttp2_transport* t = s->t;
 
   GPR_ASSERT((s->write_closed && s->read_closed) || s->id == 0);
@@ -753,8 +753,8 @@ static void destroy_stream_locked(void* sp, grpc_error* error) {
 static void destroy_stream(grpc_transport* gt, grpc_stream* gs,
                            grpc_closure* then_schedule_closure) {
   GPR_TIMER_SCOPE("destroy_stream", 0);
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
-  grpc_chttp2_stream* s = (grpc_chttp2_stream*)gs;
+  grpc_chttp2_transport* t = reinterpret_cast<grpc_chttp2_transport*>(gt);
+  grpc_chttp2_stream* s = reinterpret_cast<grpc_chttp2_stream*>(gs);
 
   if (s->stream_compression_ctx != nullptr) {
     grpc_stream_compression_context_destroy(s->stream_compression_ctx);
@@ -774,7 +774,8 @@ static void destroy_stream(grpc_transport* gt, grpc_stream* gs,
 
 grpc_chttp2_stream* grpc_chttp2_parsing_lookup_stream(grpc_chttp2_transport* t,
                                                       uint32_t id) {
-  return (grpc_chttp2_stream*)grpc_chttp2_stream_map_find(&t->stream_map, id);
+  return static_cast<grpc_chttp2_stream*>(
+      grpc_chttp2_stream_map_find(&t->stream_map, id));
 }
 
 grpc_chttp2_stream* grpc_chttp2_parsing_accept_stream(grpc_chttp2_transport* t,
@@ -786,7 +787,8 @@ grpc_chttp2_stream* grpc_chttp2_parsing_accept_stream(grpc_chttp2_transport* t,
   GPR_ASSERT(t->accepting_stream == nullptr);
   t->accepting_stream = &accepting;
   t->channel_callback.accept_stream(t->channel_callback.accept_stream_user_data,
-                                    &t->base, (void*)(uintptr_t)id);
+                                    &t->base,
+                                    (void*)static_cast<uintptr_t>(id));
   t->accepting_stream = nullptr;
   return accepting;
 }
@@ -968,7 +970,7 @@ static const char* begin_writing_desc(bool partial, bool inlined) {
 
 static void write_action_begin_locked(void* gt, grpc_error* error_ignored) {
   GPR_TIMER_SCOPE("write_action_begin_locked", 0);
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
+  grpc_chttp2_transport* t = static_cast<grpc_chttp2_transport*>(gt);
   GPR_ASSERT(t->write_state != GRPC_CHTTP2_WRITE_STATE_IDLE);
   grpc_chttp2_begin_write_result r;
   if (t->closed_with_error != GRPC_ERROR_NONE) {
@@ -1005,7 +1007,7 @@ static void write_action_begin_locked(void* gt, grpc_error* error_ignored) {
 
 static void write_action(void* gt, grpc_error* error) {
   GPR_TIMER_SCOPE("write_action", 0);
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
+  grpc_chttp2_transport* t = static_cast<grpc_chttp2_transport*>(gt);
   grpc_endpoint_write(
       t->ep, &t->outbuf,
       GRPC_CLOSURE_INIT(&t->write_action_end_locked, write_action_end_locked, t,
@@ -1014,7 +1016,7 @@ static void write_action(void* gt, grpc_error* error) {
 
 static void write_action_end_locked(void* tp, grpc_error* error) {
   GPR_TIMER_SCOPE("terminate_writing_with_lock", 0);
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
+  grpc_chttp2_transport* t = static_cast<grpc_chttp2_transport*>(tp);
 
   if (error != GRPC_ERROR_NONE) {
     close_transport_locked(t, GRPC_ERROR_REF(error));
@@ -1083,7 +1085,7 @@ void grpc_chttp2_add_incoming_goaway(grpc_chttp2_transport* t,
   t->goaway_error = grpc_error_set_str(
       grpc_error_set_int(
           GRPC_ERROR_CREATE_FROM_STATIC_STRING("GOAWAY received"),
-          GRPC_ERROR_INT_HTTP2_ERROR, (intptr_t)goaway_error),
+          GRPC_ERROR_INT_HTTP2_ERROR, static_cast<intptr_t>(goaway_error)),
       GRPC_ERROR_STR_RAW_BYTES, goaway_text);
 
   /* When a client receives a GOAWAY with error code ENHANCE_YOUR_CALM and debug
@@ -1095,12 +1097,12 @@ void grpc_chttp2_add_incoming_goaway(grpc_chttp2_transport* t,
     gpr_log(GPR_ERROR,
             "Received a GOAWAY with error code ENHANCE_YOUR_CALM and debug "
             "data equal to \"too_many_pings\"");
-    double current_keepalive_time_ms = (double)t->keepalive_time;
+    double current_keepalive_time_ms = static_cast<double>(t->keepalive_time);
     t->keepalive_time =
         current_keepalive_time_ms > INT_MAX / KEEPALIVE_TIME_BACKOFF_MULTIPLIER
             ? GRPC_MILLIS_INF_FUTURE
-            : (grpc_millis)(current_keepalive_time_ms *
-                            KEEPALIVE_TIME_BACKOFF_MULTIPLIER);
+            : static_cast<grpc_millis>(current_keepalive_time_ms *
+                                       KEEPALIVE_TIME_BACKOFF_MULTIPLIER);
   }
 
   /* lie: use transient failure from the transport to indicate goaway has been
@@ -1189,9 +1191,11 @@ void grpc_chttp2_complete_closure_step(grpc_chttp2_transport* t,
         "complete_closure_step: t=%p %p refs=%d flags=0x%04x desc=%s err=%s "
         "write_state=%s",
         t, closure,
-        (int)(closure->next_data.scratch / CLOSURE_BARRIER_FIRST_REF_BIT),
-        (int)(closure->next_data.scratch % CLOSURE_BARRIER_FIRST_REF_BIT), desc,
-        errstr, write_state_name(t->write_state));
+        static_cast<int>(closure->next_data.scratch /
+                         CLOSURE_BARRIER_FIRST_REF_BIT),
+        static_cast<int>(closure->next_data.scratch %
+                         CLOSURE_BARRIER_FIRST_REF_BIT),
+        desc, errstr, write_state_name(t->write_state));
   }
   if (error != GRPC_ERROR_NONE) {
     if (closure->error_data.error == GRPC_ERROR_NONE) {
@@ -1239,7 +1243,7 @@ static void maybe_become_writable_due_to_send_msg(grpc_chttp2_transport* t,
 static void add_fetched_slice_locked(grpc_chttp2_transport* t,
                                      grpc_chttp2_stream* s) {
   s->fetched_send_message_length +=
-      (uint32_t)GRPC_SLICE_LENGTH(s->fetching_slice);
+      static_cast<uint32_t> GRPC_SLICE_LENGTH(s->fetching_slice);
   grpc_slice_buffer_add(&s->flow_controlled_buffer, s->fetching_slice);
   maybe_become_writable_due_to_send_msg(t, s);
 }
@@ -1262,7 +1266,7 @@ static void continue_fetching_send_locked(grpc_chttp2_transport* t,
       } else {
         grpc_chttp2_write_cb* cb = t->write_cb_pool;
         if (cb == nullptr) {
-          cb = (grpc_chttp2_write_cb*)gpr_malloc(sizeof(*cb));
+          cb = static_cast<grpc_chttp2_write_cb*>(gpr_malloc(sizeof(*cb)));
         } else {
           t->write_cb_pool = cb->next;
         }
@@ -1293,7 +1297,7 @@ static void continue_fetching_send_locked(grpc_chttp2_transport* t,
 }
 
 static void complete_fetch_locked(void* gs, grpc_error* error) {
-  grpc_chttp2_stream* s = (grpc_chttp2_stream*)gs;
+  grpc_chttp2_stream* s = static_cast<grpc_chttp2_stream*>(gs);
   grpc_chttp2_transport* t = s->t;
   if (error == GRPC_ERROR_NONE) {
     error = grpc_byte_stream_pull(s->fetching_send_message, &s->fetching_slice);
@@ -1328,8 +1332,9 @@ static void perform_stream_op_locked(void* stream_op,
   GPR_TIMER_SCOPE("perform_stream_op_locked", 0);
 
   grpc_transport_stream_op_batch* op =
-      (grpc_transport_stream_op_batch*)stream_op;
-  grpc_chttp2_stream* s = (grpc_chttp2_stream*)op->handler_private.extra_arg;
+      static_cast<grpc_transport_stream_op_batch*>(stream_op);
+  grpc_chttp2_stream* s =
+      static_cast<grpc_chttp2_stream*>(op->handler_private.extra_arg);
   grpc_transport_stream_op_batch_payload* op_payload = op->payload;
   grpc_chttp2_transport* t = s->t;
 
@@ -1408,8 +1413,9 @@ static void perform_stream_op_locked(void* stream_op,
                                          "to-be-sent initial metadata size "
                                          "exceeds peer limit"),
                                      GRPC_ERROR_INT_SIZE,
-                                     (intptr_t)metadata_size),
-                  GRPC_ERROR_INT_LIMIT, (intptr_t)metadata_peer_limit),
+                                     static_cast<intptr_t>(metadata_size)),
+                  GRPC_ERROR_INT_LIMIT,
+                  static_cast<intptr_t>(metadata_peer_limit)),
               GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_RESOURCE_EXHAUSTED));
     } else {
       if (contains_non_ok_status(s->send_initial_metadata)) {
@@ -1482,15 +1488,16 @@ static void perform_stream_op_locked(void* stream_op,
       uint32_t flags = op_payload->send_message.send_message->flags;
       frame_hdr[0] = (flags & GRPC_WRITE_INTERNAL_COMPRESS) != 0;
       size_t len = op_payload->send_message.send_message->length;
-      frame_hdr[1] = (uint8_t)(len >> 24);
-      frame_hdr[2] = (uint8_t)(len >> 16);
-      frame_hdr[3] = (uint8_t)(len >> 8);
-      frame_hdr[4] = (uint8_t)(len);
+      frame_hdr[1] = static_cast<uint8_t>(len >> 24);
+      frame_hdr[2] = static_cast<uint8_t>(len >> 16);
+      frame_hdr[3] = static_cast<uint8_t>(len >> 8);
+      frame_hdr[4] = static_cast<uint8_t>(len);
       s->fetching_send_message = op_payload->send_message.send_message;
       s->fetched_send_message_length = 0;
-      s->next_message_end_offset = s->flow_controlled_bytes_written +
-                                   (int64_t)s->flow_controlled_buffer.length +
-                                   (int64_t)len;
+      s->next_message_end_offset =
+          s->flow_controlled_bytes_written +
+          static_cast<int64_t>(s->flow_controlled_buffer.length) +
+          static_cast<int64_t>(len);
       if (flags & GRPC_WRITE_BUFFER_HINT) {
         s->next_message_end_offset -= t->write_buffer_size;
         s->write_buffering = true;
@@ -1524,8 +1531,9 @@ static void perform_stream_op_locked(void* stream_op,
                                          "to-be-sent trailing metadata size "
                                          "exceeds peer limit"),
                                      GRPC_ERROR_INT_SIZE,
-                                     (intptr_t)metadata_size),
-                  GRPC_ERROR_INT_LIMIT, (intptr_t)metadata_peer_limit),
+                                     static_cast<intptr_t>(metadata_size)),
+                  GRPC_ERROR_INT_LIMIT,
+                  static_cast<intptr_t>(metadata_peer_limit)),
               GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_RESOURCE_EXHAUSTED));
     } else {
       if (contains_non_ok_status(s->send_trailing_metadata)) {
@@ -1605,8 +1613,8 @@ static void perform_stream_op_locked(void* stream_op,
 static void perform_stream_op(grpc_transport* gt, grpc_stream* gs,
                               grpc_transport_stream_op_batch* op) {
   GPR_TIMER_SCOPE("perform_stream_op", 0);
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
-  grpc_chttp2_stream* s = (grpc_chttp2_stream*)gs;
+  grpc_chttp2_transport* t = reinterpret_cast<grpc_chttp2_transport*>(gt);
+  grpc_chttp2_stream* s = reinterpret_cast<grpc_chttp2_stream*>(gs);
 
   if (!t->is_client) {
     if (op->send_initial_metadata) {
@@ -1662,7 +1670,7 @@ static void send_ping_locked(grpc_chttp2_transport* t,
 }
 
 static void retry_initiate_ping_locked(void* tp, grpc_error* error) {
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
+  grpc_chttp2_transport* t = static_cast<grpc_chttp2_transport*>(tp);
   t->ping_state.is_delayed_ping_timer_set = false;
   if (error == GRPC_ERROR_NONE) {
     grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_RETRY_SEND_PING);
@@ -1690,7 +1698,8 @@ static void send_goaway(grpc_chttp2_transport* t, grpc_error* error) {
   grpc_slice slice;
   grpc_error_get_status(error, GRPC_MILLIS_INF_FUTURE, nullptr, &slice,
                         &http_error, nullptr);
-  grpc_chttp2_goaway_append(t->last_new_stream_id, (uint32_t)http_error,
+  grpc_chttp2_goaway_append(t->last_new_stream_id,
+                            static_cast<uint32_t>(http_error),
                             grpc_slice_ref_internal(slice), &t->qbuf);
   grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_GOAWAY_SENT);
   GRPC_ERROR_UNREF(error);
@@ -1714,9 +1723,9 @@ void grpc_chttp2_add_ping_strike(grpc_chttp2_transport* t) {
 
 static void perform_transport_op_locked(void* stream_op,
                                         grpc_error* error_ignored) {
-  grpc_transport_op* op = (grpc_transport_op*)stream_op;
+  grpc_transport_op* op = static_cast<grpc_transport_op*>(stream_op);
   grpc_chttp2_transport* t =
-      (grpc_chttp2_transport*)op->handler_private.extra_arg;
+      static_cast<grpc_chttp2_transport*>(op->handler_private.extra_arg);
 
   if (op->goaway_error) {
     send_goaway(t, op->goaway_error);
@@ -1757,7 +1766,7 @@ static void perform_transport_op_locked(void* stream_op,
 }
 
 static void perform_transport_op(grpc_transport* gt, grpc_transport_op* op) {
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
+  grpc_chttp2_transport* t = reinterpret_cast<grpc_chttp2_transport*>(gt);
   char* msg = grpc_transport_op_string(op);
   gpr_free(msg);
   op->handler_private.extra_arg = gt;
@@ -1925,8 +1934,8 @@ void grpc_chttp2_maybe_complete_recv_trailing_metadata(grpc_chttp2_transport* t,
 
 static void remove_stream(grpc_chttp2_transport* t, uint32_t id,
                           grpc_error* error) {
-  grpc_chttp2_stream* s =
-      (grpc_chttp2_stream*)grpc_chttp2_stream_map_delete(&t->stream_map, id);
+  grpc_chttp2_stream* s = static_cast<grpc_chttp2_stream*>(
+      grpc_chttp2_stream_map_delete(&t->stream_map, id));
   GPR_ASSERT(s);
   if (t->incoming_stream == s) {
     t->incoming_stream = nullptr;
@@ -1978,8 +1987,9 @@ void grpc_chttp2_cancel_stream(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
       grpc_error_get_status(due_to_error, s->deadline, nullptr, nullptr,
                             &http_error, nullptr);
       grpc_slice_buffer_add(
-          &t->qbuf, grpc_chttp2_rst_stream_create(s->id, (uint32_t)http_error,
-                                                  &s->stats.outgoing));
+          &t->qbuf,
+          grpc_chttp2_rst_stream_create(
+              s->id, static_cast<uint32_t>(http_error), &s->stats.outgoing));
       grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_RST_STREAM);
     }
   }
@@ -2180,7 +2190,7 @@ static void close_from_api(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
     *p++ = '0';
     *p++ = '0';
     GPR_ASSERT(p == GRPC_SLICE_END_PTR(http_status_hdr));
-    len += (uint32_t)GRPC_SLICE_LENGTH(http_status_hdr);
+    len += static_cast<uint32_t> GRPC_SLICE_LENGTH(http_status_hdr);
 
     content_type_hdr = GRPC_SLICE_MALLOC(31);
     p = GRPC_SLICE_START_PTR(content_type_hdr);
@@ -2216,7 +2226,7 @@ static void close_from_api(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
     *p++ = 'p';
     *p++ = 'c';
     GPR_ASSERT(p == GRPC_SLICE_END_PTR(content_type_hdr));
-    len += (uint32_t)GRPC_SLICE_LENGTH(content_type_hdr);
+    len += static_cast<uint32_t> GRPC_SLICE_LENGTH(content_type_hdr);
   }
 
   status_hdr = GRPC_SLICE_MALLOC(15 + (grpc_status >= 10));
@@ -2236,14 +2246,14 @@ static void close_from_api(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
   *p++ = 's';
   if (grpc_status < 10) {
     *p++ = 1;
-    *p++ = (uint8_t)('0' + grpc_status);
+    *p++ = static_cast<uint8_t>('0' + grpc_status);
   } else {
     *p++ = 2;
-    *p++ = (uint8_t)('0' + (grpc_status / 10));
-    *p++ = (uint8_t)('0' + (grpc_status % 10));
+    *p++ = static_cast<uint8_t>('0' + (grpc_status / 10));
+    *p++ = static_cast<uint8_t>('0' + (grpc_status % 10));
   }
   GPR_ASSERT(p == GRPC_SLICE_END_PTR(status_hdr));
-  len += (uint32_t)GRPC_SLICE_LENGTH(status_hdr);
+  len += static_cast<uint32_t> GRPC_SLICE_LENGTH(status_hdr);
 
   size_t msg_len = GRPC_SLICE_LENGTH(slice);
   GPR_ASSERT(msg_len <= UINT32_MAX);
@@ -2267,20 +2277,20 @@ static void close_from_api(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
   GRPC_CHTTP2_WRITE_VARINT((uint32_t)msg_len, 1, 0, p, (uint32_t)msg_len_len);
   p += msg_len_len;
   GPR_ASSERT(p == GRPC_SLICE_END_PTR(message_pfx));
-  len += (uint32_t)GRPC_SLICE_LENGTH(message_pfx);
-  len += (uint32_t)msg_len;
+  len += static_cast<uint32_t> GRPC_SLICE_LENGTH(message_pfx);
+  len += static_cast<uint32_t>(msg_len);
 
   hdr = GRPC_SLICE_MALLOC(9);
   p = GRPC_SLICE_START_PTR(hdr);
-  *p++ = (uint8_t)(len >> 16);
-  *p++ = (uint8_t)(len >> 8);
-  *p++ = (uint8_t)(len);
+  *p++ = static_cast<uint8_t>(len >> 16);
+  *p++ = static_cast<uint8_t>(len >> 8);
+  *p++ = static_cast<uint8_t>(len);
   *p++ = GRPC_CHTTP2_FRAME_HEADER;
   *p++ = GRPC_CHTTP2_DATA_FLAG_END_STREAM | GRPC_CHTTP2_DATA_FLAG_END_HEADERS;
-  *p++ = (uint8_t)(s->id >> 24);
-  *p++ = (uint8_t)(s->id >> 16);
-  *p++ = (uint8_t)(s->id >> 8);
-  *p++ = (uint8_t)(s->id);
+  *p++ = static_cast<uint8_t>(s->id >> 24);
+  *p++ = static_cast<uint8_t>(s->id >> 16);
+  *p++ = static_cast<uint8_t>(s->id >> 8);
+  *p++ = static_cast<uint8_t>(s->id);
   GPR_ASSERT(p == GRPC_SLICE_END_PTR(hdr));
 
   grpc_slice_buffer_add(&t->qbuf, hdr);
@@ -2305,8 +2315,8 @@ typedef struct {
 } cancel_stream_cb_args;
 
 static void cancel_stream_cb(void* user_data, uint32_t key, void* stream) {
-  cancel_stream_cb_args* args = (cancel_stream_cb_args*)user_data;
-  grpc_chttp2_stream* s = (grpc_chttp2_stream*)stream;
+  cancel_stream_cb_args* args = static_cast<cancel_stream_cb_args*>(user_data);
+  grpc_chttp2_stream* s = static_cast<grpc_chttp2_stream*>(stream);
   grpc_chttp2_cancel_stream(args->t, s, GRPC_ERROR_REF(args->error));
 }
 
@@ -2389,7 +2399,7 @@ static grpc_error* try_http_parsing(grpc_chttp2_transport* t) {
 static void read_action_locked(void* tp, grpc_error* error) {
   GPR_TIMER_SCOPE("reading_action_locked", 0);
 
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
+  grpc_chttp2_transport* t = static_cast<grpc_chttp2_transport*>(tp);
 
   GRPC_ERROR_REF(error);
 
@@ -2411,7 +2421,7 @@ static void read_action_locked(void* tp, grpc_error* error) {
       grpc_core::BdpEstimator* bdp_est = t->flow_control->bdp_estimator();
       if (bdp_est) {
         bdp_est->AddIncomingBytes(
-            (int64_t)GRPC_SLICE_LENGTH(t->read_buffer.slices[i]));
+            static_cast<int64_t> GRPC_SLICE_LENGTH(t->read_buffer.slices[i]));
       }
       errors[1] = grpc_chttp2_perform_read(t, t->read_buffer.slices[i]);
     }
@@ -2480,7 +2490,7 @@ static void schedule_bdp_ping_locked(grpc_chttp2_transport* t) {
 }
 
 static void start_bdp_ping_locked(void* tp, grpc_error* error) {
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
+  grpc_chttp2_transport* t = static_cast<grpc_chttp2_transport*>(tp);
   if (grpc_http_trace.enabled()) {
     gpr_log(GPR_DEBUG, "%s: Start BDP ping err=%s", t->peer_string,
             grpc_error_string(error));
@@ -2493,7 +2503,7 @@ static void start_bdp_ping_locked(void* tp, grpc_error* error) {
 }
 
 static void finish_bdp_ping_locked(void* tp, grpc_error* error) {
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
+  grpc_chttp2_transport* t = static_cast<grpc_chttp2_transport*>(tp);
   if (grpc_http_trace.enabled()) {
     gpr_log(GPR_DEBUG, "%s: Complete BDP ping err=%s", t->peer_string,
             grpc_error_string(error));
@@ -2512,7 +2522,7 @@ static void finish_bdp_ping_locked(void* tp, grpc_error* error) {
 }
 
 static void next_bdp_ping_timer_expired_locked(void* tp, grpc_error* error) {
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
+  grpc_chttp2_transport* t = static_cast<grpc_chttp2_transport*>(tp);
   GPR_ASSERT(t->have_next_bdp_ping_timer);
   t->have_next_bdp_ping_timer = false;
   if (error != GRPC_ERROR_NONE) {
@@ -2550,11 +2560,11 @@ void grpc_chttp2_config_default_keepalive_args(grpc_channel_args* args,
         }
       } else if (0 == strcmp(args->args[i].key,
                              GRPC_ARG_KEEPALIVE_PERMIT_WITHOUT_CALLS)) {
-        const bool value = (uint32_t)grpc_channel_arg_get_integer(
+        const bool value = static_cast<uint32_t>(grpc_channel_arg_get_integer(
             &args->args[i],
             {is_client ? g_default_client_keepalive_permit_without_calls
                        : g_default_server_keepalive_timeout_ms,
-             0, 1});
+             0, 1}));
         if (is_client) {
           g_default_client_keepalive_permit_without_calls = value;
         } else {
@@ -2590,7 +2600,7 @@ void grpc_chttp2_config_default_keepalive_args(grpc_channel_args* args,
 }
 
 static void init_keepalive_ping_locked(void* arg, grpc_error* error) {
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)arg;
+  grpc_chttp2_transport* t = static_cast<grpc_chttp2_transport*>(arg);
   GPR_ASSERT(t->keepalive_state == GRPC_CHTTP2_KEEPALIVE_STATE_WAITING);
   if (t->destroying || t->closed_with_error != GRPC_ERROR_NONE) {
     t->keepalive_state = GRPC_CHTTP2_KEEPALIVE_STATE_DYING;
@@ -2619,7 +2629,7 @@ static void init_keepalive_ping_locked(void* arg, grpc_error* error) {
 }
 
 static void start_keepalive_ping_locked(void* arg, grpc_error* error) {
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)arg;
+  grpc_chttp2_transport* t = static_cast<grpc_chttp2_transport*>(arg);
   GRPC_CHTTP2_REF_TRANSPORT(t, "keepalive watchdog");
   grpc_timer_init(&t->keepalive_watchdog_timer,
                   grpc_core::ExecCtx::Get()->Now() + t->keepalive_time,
@@ -2627,7 +2637,7 @@ static void start_keepalive_ping_locked(void* arg, grpc_error* error) {
 }
 
 static void finish_keepalive_ping_locked(void* arg, grpc_error* error) {
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)arg;
+  grpc_chttp2_transport* t = static_cast<grpc_chttp2_transport*>(arg);
   if (t->keepalive_state == GRPC_CHTTP2_KEEPALIVE_STATE_PINGING) {
     if (error == GRPC_ERROR_NONE) {
       t->keepalive_state = GRPC_CHTTP2_KEEPALIVE_STATE_WAITING;
@@ -2642,7 +2652,7 @@ static void finish_keepalive_ping_locked(void* arg, grpc_error* error) {
 }
 
 static void keepalive_watchdog_fired_locked(void* arg, grpc_error* error) {
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)arg;
+  grpc_chttp2_transport* t = static_cast<grpc_chttp2_transport*>(arg);
   if (t->keepalive_state == GRPC_CHTTP2_KEEPALIVE_STATE_PINGING) {
     if (error == GRPC_ERROR_NONE) {
       t->keepalive_state = GRPC_CHTTP2_KEEPALIVE_STATE_DYING;
@@ -2682,13 +2692,13 @@ static void connectivity_state_set(grpc_chttp2_transport* t,
 
 static void set_pollset(grpc_transport* gt, grpc_stream* gs,
                         grpc_pollset* pollset) {
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
+  grpc_chttp2_transport* t = reinterpret_cast<grpc_chttp2_transport*>(gt);
   grpc_endpoint_add_to_pollset(t->ep, pollset);
 }
 
 static void set_pollset_set(grpc_transport* gt, grpc_stream* gs,
                             grpc_pollset_set* pollset_set) {
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)gt;
+  grpc_chttp2_transport* t = reinterpret_cast<grpc_chttp2_transport*>(gt);
   grpc_endpoint_add_to_pollset_set(t->ep, pollset_set);
 }
 
@@ -2697,7 +2707,7 @@ static void set_pollset_set(grpc_transport* gt, grpc_stream* gs,
  */
 
 static void reset_byte_stream(void* arg, grpc_error* error) {
-  grpc_chttp2_stream* s = (grpc_chttp2_stream*)arg;
+  grpc_chttp2_stream* s = static_cast<grpc_chttp2_stream*>(arg);
 
   s->pending_byte_stream = false;
   if (error == GRPC_ERROR_NONE) {
@@ -2723,7 +2733,7 @@ static void incoming_byte_stream_unref(grpc_chttp2_incoming_byte_stream* bs) {
 static void incoming_byte_stream_next_locked(void* argp,
                                              grpc_error* error_ignored) {
   grpc_chttp2_incoming_byte_stream* bs =
-      (grpc_chttp2_incoming_byte_stream*)argp;
+      static_cast<grpc_chttp2_incoming_byte_stream*>(argp);
   grpc_chttp2_transport* t = bs->transport;
   grpc_chttp2_stream* s = bs->stream;
 
@@ -2771,7 +2781,7 @@ static bool incoming_byte_stream_next(grpc_byte_stream* byte_stream,
                                       grpc_closure* on_complete) {
   GPR_TIMER_SCOPE("incoming_byte_stream_next", 0);
   grpc_chttp2_incoming_byte_stream* bs =
-      (grpc_chttp2_incoming_byte_stream*)byte_stream;
+      reinterpret_cast<grpc_chttp2_incoming_byte_stream*>(byte_stream);
   grpc_chttp2_stream* s = bs->stream;
   if (s->unprocessed_incoming_frames_buffer.length > 0) {
     return true;
@@ -2792,7 +2802,7 @@ static grpc_error* incoming_byte_stream_pull(grpc_byte_stream* byte_stream,
                                              grpc_slice* slice) {
   GPR_TIMER_SCOPE("incoming_byte_stream_pull", 0);
   grpc_chttp2_incoming_byte_stream* bs =
-      (grpc_chttp2_incoming_byte_stream*)byte_stream;
+      reinterpret_cast<grpc_chttp2_incoming_byte_stream*>(byte_stream);
   grpc_chttp2_stream* s = bs->stream;
   grpc_error* error;
 
@@ -2843,7 +2853,7 @@ static void incoming_byte_stream_destroy_locked(void* byte_stream,
 static void incoming_byte_stream_destroy(grpc_byte_stream* byte_stream) {
   GPR_TIMER_SCOPE("incoming_byte_stream_destroy", 0);
   grpc_chttp2_incoming_byte_stream* bs =
-      (grpc_chttp2_incoming_byte_stream*)byte_stream;
+      reinterpret_cast<grpc_chttp2_incoming_byte_stream*>(byte_stream);
   GRPC_CLOSURE_SCHED(
       GRPC_CLOSURE_INIT(&bs->destroy_action,
                         incoming_byte_stream_destroy_locked, bs,
@@ -2876,7 +2886,7 @@ grpc_error* grpc_chttp2_incoming_byte_stream_push(
     grpc_slice_unref_internal(slice);
     return error;
   } else {
-    bs->remaining_bytes -= (uint32_t)GRPC_SLICE_LENGTH(slice);
+    bs->remaining_bytes -= static_cast<uint32_t> GRPC_SLICE_LENGTH(slice);
     if (slice_out != nullptr) {
       *slice_out = slice;
     }
@@ -2904,7 +2914,7 @@ grpc_error* grpc_chttp2_incoming_byte_stream_finished(
 static void incoming_byte_stream_shutdown(grpc_byte_stream* byte_stream,
                                           grpc_error* error) {
   grpc_chttp2_incoming_byte_stream* bs =
-      (grpc_chttp2_incoming_byte_stream*)byte_stream;
+      reinterpret_cast<grpc_chttp2_incoming_byte_stream*>(byte_stream);
   GRPC_ERROR_UNREF(grpc_chttp2_incoming_byte_stream_finished(
       bs, error, true /* reset_on_error */));
 }
@@ -2916,7 +2926,7 @@ static const grpc_byte_stream_vtable grpc_chttp2_incoming_byte_stream_vtable = {
 static void incoming_byte_stream_destroy_locked(void* byte_stream,
                                                 grpc_error* error_ignored) {
   grpc_chttp2_incoming_byte_stream* bs =
-      (grpc_chttp2_incoming_byte_stream*)byte_stream;
+      static_cast<grpc_chttp2_incoming_byte_stream*>(byte_stream);
   grpc_chttp2_stream* s = bs->stream;
   grpc_chttp2_transport* t = s->t;
 
@@ -2931,8 +2941,8 @@ grpc_chttp2_incoming_byte_stream* grpc_chttp2_incoming_byte_stream_create(
     grpc_chttp2_transport* t, grpc_chttp2_stream* s, uint32_t frame_size,
     uint32_t flags) {
   grpc_chttp2_incoming_byte_stream* incoming_byte_stream =
-      (grpc_chttp2_incoming_byte_stream*)gpr_malloc(
-          sizeof(*incoming_byte_stream));
+      static_cast<grpc_chttp2_incoming_byte_stream*>(
+          gpr_malloc(sizeof(*incoming_byte_stream)));
   incoming_byte_stream->base.length = frame_size;
   incoming_byte_stream->remaining_bytes = frame_size;
   incoming_byte_stream->base.flags = flags;
@@ -2968,7 +2978,7 @@ static void post_destructive_reclaimer(grpc_chttp2_transport* t) {
 }
 
 static void benign_reclaimer_locked(void* arg, grpc_error* error) {
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)arg;
+  grpc_chttp2_transport* t = static_cast<grpc_chttp2_transport*>(arg);
   if (error == GRPC_ERROR_NONE &&
       grpc_chttp2_stream_map_size(&t->stream_map) == 0) {
     /* Channel with no active streams: send a goaway to try and make it
@@ -2996,12 +3006,12 @@ static void benign_reclaimer_locked(void* arg, grpc_error* error) {
 }
 
 static void destructive_reclaimer_locked(void* arg, grpc_error* error) {
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)arg;
+  grpc_chttp2_transport* t = static_cast<grpc_chttp2_transport*>(arg);
   size_t n = grpc_chttp2_stream_map_size(&t->stream_map);
   t->destructive_reclaimer_registered = false;
   if (error == GRPC_ERROR_NONE && n > 0) {
-    grpc_chttp2_stream* s =
-        (grpc_chttp2_stream*)grpc_chttp2_stream_map_rand(&t->stream_map);
+    grpc_chttp2_stream* s = static_cast<grpc_chttp2_stream*>(
+        grpc_chttp2_stream_map_rand(&t->stream_map));
     if (grpc_resource_quota_trace.enabled()) {
       gpr_log(GPR_DEBUG, "HTTP2: %s - abandon stream id %d", t->peer_string,
               s->id);
@@ -3078,7 +3088,7 @@ const char* grpc_chttp2_initiate_write_reason_string(
 }
 
 static grpc_endpoint* chttp2_get_endpoint(grpc_transport* t) {
-  return ((grpc_chttp2_transport*)t)->ep;
+  return (reinterpret_cast<grpc_chttp2_transport*>(t))->ep;
 }
 
 static const grpc_transport_vtable vtable = {sizeof(grpc_chttp2_stream),
@@ -3096,8 +3106,8 @@ static const grpc_transport_vtable* get_vtable(void) { return &vtable; }
 
 grpc_transport* grpc_create_chttp2_transport(
     const grpc_channel_args* channel_args, grpc_endpoint* ep, bool is_client) {
-  grpc_chttp2_transport* t =
-      (grpc_chttp2_transport*)gpr_zalloc(sizeof(grpc_chttp2_transport));
+  grpc_chttp2_transport* t = static_cast<grpc_chttp2_transport*>(
+      gpr_zalloc(sizeof(grpc_chttp2_transport)));
   init_transport(t, channel_args, ep, is_client);
   return &t->base;
 }
@@ -3105,7 +3115,8 @@ grpc_transport* grpc_create_chttp2_transport(
 void grpc_chttp2_transport_start_reading(
     grpc_transport* transport, grpc_slice_buffer* read_buffer,
     grpc_closure* notify_on_receive_settings) {
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)transport;
+  grpc_chttp2_transport* t =
+      reinterpret_cast<grpc_chttp2_transport*>(transport);
   GRPC_CHTTP2_REF_TRANSPORT(
       t, "reading_action"); /* matches unref inside reading_action */
   if (read_buffer != nullptr) {
diff --git a/src/core/ext/transport/chttp2/transport/flow_control.cc b/src/core/ext/transport/chttp2/transport/flow_control.cc
index 311fbd60b1..45b6f97b05 100644
--- a/src/core/ext/transport/chttp2/transport/flow_control.cc
+++ b/src/core/ext/transport/chttp2/transport/flow_control.cc
@@ -184,10 +184,11 @@ TransportFlowControl::TransportFlowControl(const grpc_chttp2_transport* t,
 
 uint32_t TransportFlowControl::MaybeSendUpdate(bool writing_anyway) {
   FlowControlTrace trace("t updt sent", this, nullptr);
-  const uint32_t target_announced_window = (const uint32_t)target_window();
+  const uint32_t target_announced_window =
+      static_cast<const uint32_t>(target_window());
   if ((writing_anyway || announced_window_ <= target_announced_window / 2) &&
       announced_window_ != target_announced_window) {
-    const uint32_t announce = (uint32_t)GPR_CLAMP(
+    const uint32_t announce = static_cast<uint32_t> GPR_CLAMP(
         target_announced_window - announced_window_, 0, UINT32_MAX);
     announced_window_ += announce;
     return announce;
@@ -261,7 +262,7 @@ grpc_error* StreamFlowControl::RecvData(int64_t incoming_frame_size) {
 uint32_t StreamFlowControl::MaybeSendUpdate() {
   FlowControlTrace trace("s updt sent", tfc_, this);
   if (local_window_delta_ > announced_window_delta_) {
-    uint32_t announce = (uint32_t)GPR_CLAMP(
+    uint32_t announce = static_cast<uint32_t> GPR_CLAMP(
         local_window_delta_ - announced_window_delta_, 0, UINT32_MAX);
     UpdateAnnouncedWindowDelta(tfc_, announce);
     return announce;
@@ -281,12 +282,12 @@ void StreamFlowControl::IncomingByteStreamUpdate(size_t max_size_hint,
   if (max_size_hint >= UINT32_MAX - sent_init_window) {
     max_recv_bytes = UINT32_MAX - sent_init_window;
   } else {
-    max_recv_bytes = (uint32_t)max_size_hint;
+    max_recv_bytes = static_cast<uint32_t>(max_size_hint);
   }
 
   /* account for bytes already received but unknown to higher layers */
   if (max_recv_bytes >= have_already) {
-    max_recv_bytes -= (uint32_t)have_already;
+    max_recv_bytes -= static_cast<uint32_t>(have_already);
   } else {
     max_recv_bytes = 0;
   }
@@ -295,7 +296,7 @@ void StreamFlowControl::IncomingByteStreamUpdate(size_t max_size_hint,
   GPR_ASSERT(max_recv_bytes <= UINT32_MAX - sent_init_window);
   if (local_window_delta_ < max_recv_bytes) {
     uint32_t add_max_recv_bytes =
-        (uint32_t)(max_recv_bytes - local_window_delta_);
+        static_cast<uint32_t>(max_recv_bytes - local_window_delta_);
     local_window_delta_ += add_max_recv_bytes;
   }
 }
@@ -328,7 +329,7 @@ double TransportFlowControl::TargetLogBdp() {
 double TransportFlowControl::SmoothLogBdp(double value) {
   grpc_millis now = grpc_core::ExecCtx::Get()->Now();
   double bdp_error = value - pid_controller_.last_control_value();
-  const double dt = (double)(now - last_pid_update_) * 1e-3;
+  const double dt = static_cast<double>(now - last_pid_update_) * 1e-3;
   last_pid_update_ = now;
   // Limit dt to 100ms
   const double kMaxDt = 0.1;
@@ -337,8 +338,8 @@ double TransportFlowControl::SmoothLogBdp(double value) {
 
 FlowControlAction::Urgency TransportFlowControl::DeltaUrgency(
     int64_t value, grpc_chttp2_setting_id setting_id) {
-  int64_t delta =
-      (int64_t)value - (int64_t)t_->settings[GRPC_LOCAL_SETTINGS][setting_id];
+  int64_t delta = value - static_cast<int64_t>(
+                              t_->settings[GRPC_LOCAL_SETTINGS][setting_id]);
   // TODO(ncteisen): tune this
   if (delta != 0 && (delta <= -value / 5 || delta >= value / 5)) {
     return FlowControlAction::Urgency::QUEUE_UPDATE;
@@ -357,22 +358,24 @@ FlowControlAction TransportFlowControl::PeriodicUpdate() {
     const double target = pow(2, SmoothLogBdp(TargetLogBdp()));
 
     // Though initial window 'could' drop to 0, we keep the floor at 128
-    target_initial_window_size_ = (int32_t)GPR_CLAMP(target, 128, INT32_MAX);
+    target_initial_window_size_ =
+        static_cast<int32_t> GPR_CLAMP(target, 128, INT32_MAX);
 
     action.set_send_initial_window_update(
         DeltaUrgency(target_initial_window_size_,
                      GRPC_CHTTP2_SETTINGS_INITIAL_WINDOW_SIZE),
-        (uint32_t)target_initial_window_size_);
+        static_cast<uint32_t>(target_initial_window_size_));
 
     // get bandwidth estimate and update max_frame accordingly.
     double bw_dbl = bdp_estimator_.EstimateBandwidth();
     // we target the max of BDP or bandwidth in microseconds.
-    int32_t frame_size = (int32_t)GPR_CLAMP(
+    int32_t frame_size = static_cast<int32_t> GPR_CLAMP(
         GPR_MAX((int32_t)GPR_CLAMP(bw_dbl, 0, INT_MAX) / 1000,
                 target_initial_window_size_),
         16384, 16777215);
     action.set_send_max_frame_size_update(
-        DeltaUrgency((int64_t)frame_size, GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE),
+        DeltaUrgency(static_cast<int64_t>(frame_size),
+                     GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE),
         frame_size);
   }
   return UpdateAction(action);
diff --git a/src/core/ext/transport/chttp2/transport/flow_control.h b/src/core/ext/transport/chttp2/transport/flow_control.h
index 19c189393f..b58027790d 100644
--- a/src/core/ext/transport/chttp2/transport/flow_control.h
+++ b/src/core/ext/transport/chttp2/transport/flow_control.h
@@ -44,7 +44,7 @@ namespace grpc_core {
 namespace chttp2 {
 
 static constexpr uint32_t kDefaultWindow = 65535;
-static constexpr int64_t kMaxWindow = (int64_t)((1u << 31) - 1);
+static constexpr int64_t kMaxWindow = static_cast<int64_t>((1u << 31) - 1);
 // TODO(ncteisen): Tune this
 static constexpr uint32_t kFrameSize = 1024 * 1024;
 
@@ -271,9 +271,10 @@ class TransportFlowControl final : public TransportFlowControlBase {
   // See comment above announced_stream_total_over_incoming_window_ for the
   // logic behind this decision.
   int64_t target_window() const override {
-    return (uint32_t)GPR_MIN((int64_t)((1u << 31) - 1),
-                             announced_stream_total_over_incoming_window_ +
-                                 target_initial_window_size_);
+    return static_cast<uint32_t> GPR_MIN(
+        (int64_t)((1u << 31) - 1),
+        announced_stream_total_over_incoming_window_ +
+            target_initial_window_size_);
   }
 
   const grpc_chttp2_transport* transport() const { return t_; }
diff --git a/src/core/ext/transport/chttp2/transport/frame_data.cc b/src/core/ext/transport/chttp2/transport/frame_data.cc
index 5ea495f2db..721f0a55a1 100644
--- a/src/core/ext/transport/chttp2/transport/frame_data.cc
+++ b/src/core/ext/transport/chttp2/transport/frame_data.cc
@@ -51,9 +51,9 @@ grpc_error* grpc_chttp2_data_parser_begin_frame(grpc_chttp2_data_parser* parser,
   if (flags & ~GRPC_CHTTP2_DATA_FLAG_END_STREAM) {
     char* msg;
     gpr_asprintf(&msg, "unsupported data flags: 0x%02x", flags);
-    grpc_error* err =
-        grpc_error_set_int(GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg),
-                           GRPC_ERROR_INT_STREAM_ID, (intptr_t)stream_id);
+    grpc_error* err = grpc_error_set_int(
+        GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg), GRPC_ERROR_INT_STREAM_ID,
+        static_cast<intptr_t>(stream_id));
     gpr_free(msg);
     return err;
   }
@@ -78,15 +78,15 @@ void grpc_chttp2_encode_data(uint32_t id, grpc_slice_buffer* inbuf,
   hdr = GRPC_SLICE_MALLOC(header_size);
   p = GRPC_SLICE_START_PTR(hdr);
   GPR_ASSERT(write_bytes < (1 << 24));
-  *p++ = (uint8_t)(write_bytes >> 16);
-  *p++ = (uint8_t)(write_bytes >> 8);
-  *p++ = (uint8_t)(write_bytes);
+  *p++ = static_cast<uint8_t>(write_bytes >> 16);
+  *p++ = static_cast<uint8_t>(write_bytes >> 8);
+  *p++ = static_cast<uint8_t>(write_bytes);
   *p++ = GRPC_CHTTP2_FRAME_DATA;
   *p++ = is_eof ? GRPC_CHTTP2_DATA_FLAG_END_STREAM : 0;
-  *p++ = (uint8_t)(id >> 24);
-  *p++ = (uint8_t)(id >> 16);
-  *p++ = (uint8_t)(id >> 8);
-  *p++ = (uint8_t)(id);
+  *p++ = static_cast<uint8_t>(id >> 24);
+  *p++ = static_cast<uint8_t>(id >> 16);
+  *p++ = static_cast<uint8_t>(id >> 8);
+  *p++ = static_cast<uint8_t>(id);
   grpc_slice_buffer_add(outbuf, hdr);
 
   grpc_slice_buffer_move_first_no_ref(inbuf, write_bytes, outbuf);
@@ -139,7 +139,7 @@ grpc_error* grpc_deframe_unprocessed_incoming_frames(
             gpr_asprintf(&msg, "Bad GRPC frame type 0x%02x", p->frame_type);
             p->error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
             p->error = grpc_error_set_int(p->error, GRPC_ERROR_INT_STREAM_ID,
-                                          (intptr_t)s->id);
+                                          static_cast<intptr_t>(s->id));
             gpr_free(msg);
             msg = grpc_dump_slice(slice, GPR_DUMP_HEX | GPR_DUMP_ASCII);
             p->error = grpc_error_set_str(p->error, GRPC_ERROR_STR_RAW_BYTES,
@@ -159,7 +159,7 @@ grpc_error* grpc_deframe_unprocessed_incoming_frames(
       /* fallthrough */
       case GRPC_CHTTP2_DATA_FH_1:
         s->stats.incoming.framing_bytes++;
-        p->frame_size = ((uint32_t)*cur) << 24;
+        p->frame_size = (static_cast<uint32_t>(*cur)) << 24;
         if (++cur == end) {
           p->state = GRPC_CHTTP2_DATA_FH_2;
           grpc_slice_unref_internal(slice);
@@ -168,7 +168,7 @@ grpc_error* grpc_deframe_unprocessed_incoming_frames(
       /* fallthrough */
       case GRPC_CHTTP2_DATA_FH_2:
         s->stats.incoming.framing_bytes++;
-        p->frame_size |= ((uint32_t)*cur) << 16;
+        p->frame_size |= (static_cast<uint32_t>(*cur)) << 16;
         if (++cur == end) {
           p->state = GRPC_CHTTP2_DATA_FH_3;
           grpc_slice_unref_internal(slice);
@@ -177,7 +177,7 @@ grpc_error* grpc_deframe_unprocessed_incoming_frames(
       /* fallthrough */
       case GRPC_CHTTP2_DATA_FH_3:
         s->stats.incoming.framing_bytes++;
-        p->frame_size |= ((uint32_t)*cur) << 8;
+        p->frame_size |= (static_cast<uint32_t>(*cur)) << 8;
         if (++cur == end) {
           p->state = GRPC_CHTTP2_DATA_FH_4;
           grpc_slice_unref_internal(slice);
@@ -188,7 +188,7 @@ grpc_error* grpc_deframe_unprocessed_incoming_frames(
         s->stats.incoming.framing_bytes++;
         GPR_ASSERT(stream_out != nullptr);
         GPR_ASSERT(p->parsing_frame == nullptr);
-        p->frame_size |= ((uint32_t)*cur);
+        p->frame_size |= (static_cast<uint32_t>(*cur));
         p->state = GRPC_CHTTP2_DATA_FRAME;
         ++cur;
         message_flags = 0;
@@ -208,8 +208,8 @@ grpc_error* grpc_deframe_unprocessed_incoming_frames(
 
         if (cur != end) {
           grpc_slice_buffer_undo_take_first(
-              slices,
-              grpc_slice_sub(slice, (size_t)(cur - beg), (size_t)(end - beg)));
+              slices, grpc_slice_sub(slice, static_cast<size_t>(cur - beg),
+                                     static_cast<size_t>(end - beg)));
         }
         grpc_slice_unref_internal(slice);
         return GRPC_ERROR_NONE;
@@ -220,14 +220,15 @@ grpc_error* grpc_deframe_unprocessed_incoming_frames(
           grpc_slice_unref_internal(slice);
           continue;
         }
-        uint32_t remaining = (uint32_t)(end - cur);
+        uint32_t remaining = static_cast<uint32_t>(end - cur);
         if (remaining == p->frame_size) {
           s->stats.incoming.data_bytes += remaining;
-          if (GRPC_ERROR_NONE != (error = grpc_chttp2_incoming_byte_stream_push(
-                                      p->parsing_frame,
-                                      grpc_slice_sub(slice, (size_t)(cur - beg),
-                                                     (size_t)(end - beg)),
-                                      slice_out))) {
+          if (GRPC_ERROR_NONE !=
+              (error = grpc_chttp2_incoming_byte_stream_push(
+                   p->parsing_frame,
+                   grpc_slice_sub(slice, static_cast<size_t>(cur - beg),
+                                  static_cast<size_t>(end - beg)),
+                   slice_out))) {
             grpc_slice_unref_internal(slice);
             return error;
           }
@@ -243,11 +244,12 @@ grpc_error* grpc_deframe_unprocessed_incoming_frames(
           return GRPC_ERROR_NONE;
         } else if (remaining < p->frame_size) {
           s->stats.incoming.data_bytes += remaining;
-          if (GRPC_ERROR_NONE != (error = grpc_chttp2_incoming_byte_stream_push(
-                                      p->parsing_frame,
-                                      grpc_slice_sub(slice, (size_t)(cur - beg),
-                                                     (size_t)(end - beg)),
-                                      slice_out))) {
+          if (GRPC_ERROR_NONE !=
+              (error = grpc_chttp2_incoming_byte_stream_push(
+                   p->parsing_frame,
+                   grpc_slice_sub(slice, static_cast<size_t>(cur - beg),
+                                  static_cast<size_t>(end - beg)),
+                   slice_out))) {
             return error;
           }
           p->frame_size -= remaining;
@@ -259,8 +261,9 @@ grpc_error* grpc_deframe_unprocessed_incoming_frames(
           if (GRPC_ERROR_NONE !=
               (grpc_chttp2_incoming_byte_stream_push(
                   p->parsing_frame,
-                  grpc_slice_sub(slice, (size_t)(cur - beg),
-                                 (size_t)(cur + p->frame_size - beg)),
+                  grpc_slice_sub(
+                      slice, static_cast<size_t>(cur - beg),
+                      static_cast<size_t>(cur + p->frame_size - beg)),
                   slice_out))) {
             grpc_slice_unref_internal(slice);
             return error;
@@ -275,8 +278,8 @@ grpc_error* grpc_deframe_unprocessed_incoming_frames(
           p->state = GRPC_CHTTP2_DATA_FH_0;
           cur += p->frame_size;
           grpc_slice_buffer_undo_take_first(
-              slices,
-              grpc_slice_sub(slice, (size_t)(cur - beg), (size_t)(end - beg)));
+              slices, grpc_slice_sub(slice, static_cast<size_t>(cur - beg),
+                                     static_cast<size_t>(end - beg)));
           grpc_slice_unref_internal(slice);
           return GRPC_ERROR_NONE;
         }
diff --git a/src/core/ext/transport/chttp2/transport/frame_goaway.cc b/src/core/ext/transport/chttp2/transport/frame_goaway.cc
index b60b4227fe..70931ed22d 100644
--- a/src/core/ext/transport/chttp2/transport/frame_goaway.cc
+++ b/src/core/ext/transport/chttp2/transport/frame_goaway.cc
@@ -46,7 +46,7 @@ grpc_error* grpc_chttp2_goaway_parser_begin_frame(grpc_chttp2_goaway_parser* p,
 
   gpr_free(p->debug_data);
   p->debug_length = length - 8;
-  p->debug_data = (char*)gpr_malloc(p->debug_length);
+  p->debug_data = static_cast<char*>(gpr_malloc(p->debug_length));
   p->debug_pos = 0;
   p->state = GRPC_CHTTP2_GOAWAY_LSI0;
   return GRPC_ERROR_NONE;
@@ -59,7 +59,8 @@ grpc_error* grpc_chttp2_goaway_parser_parse(void* parser,
   uint8_t* const beg = GRPC_SLICE_START_PTR(slice);
   uint8_t* const end = GRPC_SLICE_END_PTR(slice);
   uint8_t* cur = beg;
-  grpc_chttp2_goaway_parser* p = (grpc_chttp2_goaway_parser*)parser;
+  grpc_chttp2_goaway_parser* p =
+      static_cast<grpc_chttp2_goaway_parser*>(parser);
 
   switch (p->state) {
     case GRPC_CHTTP2_GOAWAY_LSI0:
@@ -67,7 +68,7 @@ grpc_error* grpc_chttp2_goaway_parser_parse(void* parser,
         p->state = GRPC_CHTTP2_GOAWAY_LSI0;
         return GRPC_ERROR_NONE;
       }
-      p->last_stream_id = ((uint32_t)*cur) << 24;
+      p->last_stream_id = (static_cast<uint32_t>(*cur)) << 24;
       ++cur;
     /* fallthrough */
     case GRPC_CHTTP2_GOAWAY_LSI1:
@@ -75,7 +76,7 @@ grpc_error* grpc_chttp2_goaway_parser_parse(void* parser,
         p->state = GRPC_CHTTP2_GOAWAY_LSI1;
         return GRPC_ERROR_NONE;
       }
-      p->last_stream_id |= ((uint32_t)*cur) << 16;
+      p->last_stream_id |= (static_cast<uint32_t>(*cur)) << 16;
       ++cur;
     /* fallthrough */
     case GRPC_CHTTP2_GOAWAY_LSI2:
@@ -83,7 +84,7 @@ grpc_error* grpc_chttp2_goaway_parser_parse(void* parser,
         p->state = GRPC_CHTTP2_GOAWAY_LSI2;
         return GRPC_ERROR_NONE;
       }
-      p->last_stream_id |= ((uint32_t)*cur) << 8;
+      p->last_stream_id |= (static_cast<uint32_t>(*cur)) << 8;
       ++cur;
     /* fallthrough */
     case GRPC_CHTTP2_GOAWAY_LSI3:
@@ -91,7 +92,7 @@ grpc_error* grpc_chttp2_goaway_parser_parse(void* parser,
         p->state = GRPC_CHTTP2_GOAWAY_LSI3;
         return GRPC_ERROR_NONE;
       }
-      p->last_stream_id |= ((uint32_t)*cur);
+      p->last_stream_id |= (static_cast<uint32_t>(*cur));
       ++cur;
     /* fallthrough */
     case GRPC_CHTTP2_GOAWAY_ERR0:
@@ -99,7 +100,7 @@ grpc_error* grpc_chttp2_goaway_parser_parse(void* parser,
         p->state = GRPC_CHTTP2_GOAWAY_ERR0;
         return GRPC_ERROR_NONE;
       }
-      p->error_code = ((uint32_t)*cur) << 24;
+      p->error_code = (static_cast<uint32_t>(*cur)) << 24;
       ++cur;
     /* fallthrough */
     case GRPC_CHTTP2_GOAWAY_ERR1:
@@ -107,7 +108,7 @@ grpc_error* grpc_chttp2_goaway_parser_parse(void* parser,
         p->state = GRPC_CHTTP2_GOAWAY_ERR1;
         return GRPC_ERROR_NONE;
       }
-      p->error_code |= ((uint32_t)*cur) << 16;
+      p->error_code |= (static_cast<uint32_t>(*cur)) << 16;
       ++cur;
     /* fallthrough */
     case GRPC_CHTTP2_GOAWAY_ERR2:
@@ -115,7 +116,7 @@ grpc_error* grpc_chttp2_goaway_parser_parse(void* parser,
         p->state = GRPC_CHTTP2_GOAWAY_ERR2;
         return GRPC_ERROR_NONE;
       }
-      p->error_code |= ((uint32_t)*cur) << 8;
+      p->error_code |= (static_cast<uint32_t>(*cur)) << 8;
       ++cur;
     /* fallthrough */
     case GRPC_CHTTP2_GOAWAY_ERR3:
@@ -123,18 +124,19 @@ grpc_error* grpc_chttp2_goaway_parser_parse(void* parser,
         p->state = GRPC_CHTTP2_GOAWAY_ERR3;
         return GRPC_ERROR_NONE;
       }
-      p->error_code |= ((uint32_t)*cur);
+      p->error_code |= (static_cast<uint32_t>(*cur));
       ++cur;
     /* fallthrough */
     case GRPC_CHTTP2_GOAWAY_DEBUG:
       if (end != cur)
-        memcpy(p->debug_data + p->debug_pos, cur, (size_t)(end - cur));
+        memcpy(p->debug_data + p->debug_pos, cur,
+               static_cast<size_t>(end - cur));
       GPR_ASSERT((size_t)(end - cur) < UINT32_MAX - p->debug_pos);
-      p->debug_pos += (uint32_t)(end - cur);
+      p->debug_pos += static_cast<uint32_t>(end - cur);
       p->state = GRPC_CHTTP2_GOAWAY_DEBUG;
       if (is_last) {
         grpc_chttp2_add_incoming_goaway(
-            t, (uint32_t)p->error_code,
+            t, p->error_code,
             grpc_slice_new(p->debug_data, p->debug_length, gpr_free));
         p->debug_data = nullptr;
       }
@@ -151,12 +153,12 @@ void grpc_chttp2_goaway_append(uint32_t last_stream_id, uint32_t error_code,
   uint8_t* p = GRPC_SLICE_START_PTR(header);
   uint32_t frame_length;
   GPR_ASSERT(GRPC_SLICE_LENGTH(debug_data) < UINT32_MAX - 4 - 4);
-  frame_length = 4 + 4 + (uint32_t)GRPC_SLICE_LENGTH(debug_data);
+  frame_length = 4 + 4 + static_cast<uint32_t> GRPC_SLICE_LENGTH(debug_data);
 
   /* frame header: length */
-  *p++ = (uint8_t)(frame_length >> 16);
-  *p++ = (uint8_t)(frame_length >> 8);
-  *p++ = (uint8_t)(frame_length);
+  *p++ = static_cast<uint8_t>(frame_length >> 16);
+  *p++ = static_cast<uint8_t>(frame_length >> 8);
+  *p++ = static_cast<uint8_t>(frame_length);
   /* frame header: type */
   *p++ = GRPC_CHTTP2_FRAME_GOAWAY;
   /* frame header: flags */
@@ -167,15 +169,15 @@ void grpc_chttp2_goaway_append(uint32_t last_stream_id, uint32_t error_code,
   *p++ = 0;
   *p++ = 0;
   /* payload: last stream id */
-  *p++ = (uint8_t)(last_stream_id >> 24);
-  *p++ = (uint8_t)(last_stream_id >> 16);
-  *p++ = (uint8_t)(last_stream_id >> 8);
-  *p++ = (uint8_t)(last_stream_id);
+  *p++ = static_cast<uint8_t>(last_stream_id >> 24);
+  *p++ = static_cast<uint8_t>(last_stream_id >> 16);
+  *p++ = static_cast<uint8_t>(last_stream_id >> 8);
+  *p++ = static_cast<uint8_t>(last_stream_id);
   /* payload: error code */
-  *p++ = (uint8_t)(error_code >> 24);
-  *p++ = (uint8_t)(error_code >> 16);
-  *p++ = (uint8_t)(error_code >> 8);
-  *p++ = (uint8_t)(error_code);
+  *p++ = static_cast<uint8_t>(error_code >> 24);
+  *p++ = static_cast<uint8_t>(error_code >> 16);
+  *p++ = static_cast<uint8_t>(error_code >> 8);
+  *p++ = static_cast<uint8_t>(error_code);
   GPR_ASSERT(p == GRPC_SLICE_END_PTR(header));
   grpc_slice_buffer_add(slice_buffer, header);
   grpc_slice_buffer_add(slice_buffer, debug_data);
diff --git a/src/core/ext/transport/chttp2/transport/frame_ping.cc b/src/core/ext/transport/chttp2/transport/frame_ping.cc
index 298a56721a..6229459397 100644
--- a/src/core/ext/transport/chttp2/transport/frame_ping.cc
+++ b/src/core/ext/transport/chttp2/transport/frame_ping.cc
@@ -40,14 +40,14 @@ grpc_slice grpc_chttp2_ping_create(uint8_t ack, uint64_t opaque_8bytes) {
   *p++ = 0;
   *p++ = 0;
   *p++ = 0;
-  *p++ = (uint8_t)(opaque_8bytes >> 56);
-  *p++ = (uint8_t)(opaque_8bytes >> 48);
-  *p++ = (uint8_t)(opaque_8bytes >> 40);
-  *p++ = (uint8_t)(opaque_8bytes >> 32);
-  *p++ = (uint8_t)(opaque_8bytes >> 24);
-  *p++ = (uint8_t)(opaque_8bytes >> 16);
-  *p++ = (uint8_t)(opaque_8bytes >> 8);
-  *p++ = (uint8_t)(opaque_8bytes);
+  *p++ = static_cast<uint8_t>(opaque_8bytes >> 56);
+  *p++ = static_cast<uint8_t>(opaque_8bytes >> 48);
+  *p++ = static_cast<uint8_t>(opaque_8bytes >> 40);
+  *p++ = static_cast<uint8_t>(opaque_8bytes >> 32);
+  *p++ = static_cast<uint8_t>(opaque_8bytes >> 24);
+  *p++ = static_cast<uint8_t>(opaque_8bytes >> 16);
+  *p++ = static_cast<uint8_t>(opaque_8bytes >> 8);
+  *p++ = static_cast<uint8_t>(opaque_8bytes);
 
   return slice;
 }
@@ -75,10 +75,10 @@ grpc_error* grpc_chttp2_ping_parser_parse(void* parser,
   uint8_t* const beg = GRPC_SLICE_START_PTR(slice);
   uint8_t* const end = GRPC_SLICE_END_PTR(slice);
   uint8_t* cur = beg;
-  grpc_chttp2_ping_parser* p = (grpc_chttp2_ping_parser*)parser;
+  grpc_chttp2_ping_parser* p = static_cast<grpc_chttp2_ping_parser*>(parser);
 
   while (p->byte != 8 && cur != end) {
-    p->opaque_8bytes |= (((uint64_t)*cur) << (56 - 8 * p->byte));
+    p->opaque_8bytes |= ((static_cast<uint64_t>(*cur)) << (56 - 8 * p->byte));
     cur++;
     p->byte++;
   }
@@ -112,8 +112,8 @@ grpc_error* grpc_chttp2_ping_parser_parse(void* parser,
       if (!g_disable_ping_ack) {
         if (t->ping_ack_count == t->ping_ack_capacity) {
           t->ping_ack_capacity = GPR_MAX(t->ping_ack_capacity * 3 / 2, 3);
-          t->ping_acks = (uint64_t*)gpr_realloc(
-              t->ping_acks, t->ping_ack_capacity * sizeof(*t->ping_acks));
+          t->ping_acks = static_cast<uint64_t*>(gpr_realloc(
+              t->ping_acks, t->ping_ack_capacity * sizeof(*t->ping_acks)));
         }
         t->ping_acks[t->ping_ack_count++] = p->opaque_8bytes;
         grpc_chttp2_initiate_write(t, GRPC_CHTTP2_INITIATE_WRITE_PING_RESPONSE);
diff --git a/src/core/ext/transport/chttp2/transport/frame_rst_stream.cc b/src/core/ext/transport/chttp2/transport/frame_rst_stream.cc
index fee576678d..79528762e0 100644
--- a/src/core/ext/transport/chttp2/transport/frame_rst_stream.cc
+++ b/src/core/ext/transport/chttp2/transport/frame_rst_stream.cc
@@ -42,15 +42,15 @@ grpc_slice grpc_chttp2_rst_stream_create(uint32_t id, uint32_t code,
   // Flags.
   *p++ = 0;
   // Stream ID.
-  *p++ = (uint8_t)(id >> 24);
-  *p++ = (uint8_t)(id >> 16);
-  *p++ = (uint8_t)(id >> 8);
-  *p++ = (uint8_t)(id);
+  *p++ = static_cast<uint8_t>(id >> 24);
+  *p++ = static_cast<uint8_t>(id >> 16);
+  *p++ = static_cast<uint8_t>(id >> 8);
+  *p++ = static_cast<uint8_t>(id);
   // Error code.
-  *p++ = (uint8_t)(code >> 24);
-  *p++ = (uint8_t)(code >> 16);
-  *p++ = (uint8_t)(code >> 8);
-  *p++ = (uint8_t)(code);
+  *p++ = static_cast<uint8_t>(code >> 24);
+  *p++ = static_cast<uint8_t>(code >> 16);
+  *p++ = static_cast<uint8_t>(code >> 8);
+  *p++ = static_cast<uint8_t>(code);
 
   return slice;
 }
@@ -76,21 +76,22 @@ grpc_error* grpc_chttp2_rst_stream_parser_parse(void* parser,
   uint8_t* const beg = GRPC_SLICE_START_PTR(slice);
   uint8_t* const end = GRPC_SLICE_END_PTR(slice);
   uint8_t* cur = beg;
-  grpc_chttp2_rst_stream_parser* p = (grpc_chttp2_rst_stream_parser*)parser;
+  grpc_chttp2_rst_stream_parser* p =
+      static_cast<grpc_chttp2_rst_stream_parser*>(parser);
 
   while (p->byte != 4 && cur != end) {
     p->reason_bytes[p->byte] = *cur;
     cur++;
     p->byte++;
   }
-  s->stats.incoming.framing_bytes += (uint64_t)(end - cur);
+  s->stats.incoming.framing_bytes += static_cast<uint64_t>(end - cur);
 
   if (p->byte == 4) {
     GPR_ASSERT(is_last);
-    uint32_t reason = (((uint32_t)p->reason_bytes[0]) << 24) |
-                      (((uint32_t)p->reason_bytes[1]) << 16) |
-                      (((uint32_t)p->reason_bytes[2]) << 8) |
-                      (((uint32_t)p->reason_bytes[3]));
+    uint32_t reason = ((static_cast<uint32_t>(p->reason_bytes[0])) << 24) |
+                      ((static_cast<uint32_t>(p->reason_bytes[1])) << 16) |
+                      ((static_cast<uint32_t>(p->reason_bytes[2])) << 8) |
+                      ((static_cast<uint32_t>(p->reason_bytes[3])));
     grpc_error* error = GRPC_ERROR_NONE;
     if (reason != GRPC_HTTP2_NO_ERROR || s->metadata_buffer[1].size == 0) {
       char* message;
@@ -99,7 +100,7 @@ grpc_error* grpc_chttp2_rst_stream_parser_parse(void* parser,
           grpc_error_set_str(GRPC_ERROR_CREATE_FROM_STATIC_STRING("RST_STREAM"),
                              GRPC_ERROR_STR_GRPC_MESSAGE,
                              grpc_slice_from_copied_string(message)),
-          GRPC_ERROR_INT_HTTP2_ERROR, (intptr_t)reason);
+          GRPC_ERROR_INT_HTTP2_ERROR, static_cast<intptr_t>(reason));
       gpr_free(message);
     }
     grpc_chttp2_mark_stream_closed(t, s, true, true, error);
diff --git a/src/core/ext/transport/chttp2/transport/frame_settings.cc b/src/core/ext/transport/chttp2/transport/frame_settings.cc
index 36d6b48f02..737a9382e0 100644
--- a/src/core/ext/transport/chttp2/transport/frame_settings.cc
+++ b/src/core/ext/transport/chttp2/transport/frame_settings.cc
@@ -31,9 +31,9 @@
 #include "src/core/lib/transport/http2_errors.h"
 
 static uint8_t* fill_header(uint8_t* out, uint32_t length, uint8_t flags) {
-  *out++ = (uint8_t)(length >> 16);
-  *out++ = (uint8_t)(length >> 8);
-  *out++ = (uint8_t)(length);
+  *out++ = static_cast<uint8_t>(length >> 16);
+  *out++ = static_cast<uint8_t>(length >> 8);
+  *out++ = static_cast<uint8_t>(length);
   *out++ = GRPC_CHTTP2_FRAME_SETTINGS;
   *out++ = flags;
   *out++ = 0;
@@ -60,12 +60,12 @@ grpc_slice grpc_chttp2_settings_create(uint32_t* old_settings,
 
   for (i = 0; i < count; i++) {
     if (new_settings[i] != old_settings[i] || (force_mask & (1u << i)) != 0) {
-      *p++ = (uint8_t)(grpc_setting_id_to_wire_id[i] >> 8);
-      *p++ = (uint8_t)(grpc_setting_id_to_wire_id[i]);
-      *p++ = (uint8_t)(new_settings[i] >> 24);
-      *p++ = (uint8_t)(new_settings[i] >> 16);
-      *p++ = (uint8_t)(new_settings[i] >> 8);
-      *p++ = (uint8_t)(new_settings[i]);
+      *p++ = static_cast<uint8_t>(grpc_setting_id_to_wire_id[i] >> 8);
+      *p++ = static_cast<uint8_t>(grpc_setting_id_to_wire_id[i]);
+      *p++ = static_cast<uint8_t>(new_settings[i] >> 24);
+      *p++ = static_cast<uint8_t>(new_settings[i] >> 16);
+      *p++ = static_cast<uint8_t>(new_settings[i] >> 8);
+      *p++ = static_cast<uint8_t>(new_settings[i]);
       old_settings[i] = new_settings[i];
     }
   }
@@ -110,7 +110,8 @@ grpc_error* grpc_chttp2_settings_parser_begin_frame(
 grpc_error* grpc_chttp2_settings_parser_parse(void* p, grpc_chttp2_transport* t,
                                               grpc_chttp2_stream* s,
                                               grpc_slice slice, int is_last) {
-  grpc_chttp2_settings_parser* parser = (grpc_chttp2_settings_parser*)p;
+  grpc_chttp2_settings_parser* parser =
+      static_cast<grpc_chttp2_settings_parser*>(p);
   const uint8_t* cur = GRPC_SLICE_START_PTR(slice);
   const uint8_t* end = GRPC_SLICE_END_PTR(slice);
   char* msg;
@@ -137,7 +138,7 @@ grpc_error* grpc_chttp2_settings_parser_parse(void* p, grpc_chttp2_transport* t,
           }
           return GRPC_ERROR_NONE;
         }
-        parser->id = (uint16_t)(((uint16_t)*cur) << 8);
+        parser->id = static_cast<uint16_t>((static_cast<uint16_t>(*cur)) << 8);
         cur++;
       /* fallthrough */
       case GRPC_CHTTP2_SPS_ID1:
@@ -145,7 +146,7 @@ grpc_error* grpc_chttp2_settings_parser_parse(void* p, grpc_chttp2_transport* t,
           parser->state = GRPC_CHTTP2_SPS_ID1;
           return GRPC_ERROR_NONE;
         }
-        parser->id = (uint16_t)(parser->id | (*cur));
+        parser->id = static_cast<uint16_t>(parser->id | (*cur));
         cur++;
       /* fallthrough */
       case GRPC_CHTTP2_SPS_VAL0:
@@ -153,7 +154,7 @@ grpc_error* grpc_chttp2_settings_parser_parse(void* p, grpc_chttp2_transport* t,
           parser->state = GRPC_CHTTP2_SPS_VAL0;
           return GRPC_ERROR_NONE;
         }
-        parser->value = ((uint32_t)*cur) << 24;
+        parser->value = (static_cast<uint32_t>(*cur)) << 24;
         cur++;
       /* fallthrough */
       case GRPC_CHTTP2_SPS_VAL1:
@@ -161,7 +162,7 @@ grpc_error* grpc_chttp2_settings_parser_parse(void* p, grpc_chttp2_transport* t,
           parser->state = GRPC_CHTTP2_SPS_VAL1;
           return GRPC_ERROR_NONE;
         }
-        parser->value |= ((uint32_t)*cur) << 16;
+        parser->value |= (static_cast<uint32_t>(*cur)) << 16;
         cur++;
       /* fallthrough */
       case GRPC_CHTTP2_SPS_VAL2:
@@ -169,7 +170,7 @@ grpc_error* grpc_chttp2_settings_parser_parse(void* p, grpc_chttp2_transport* t,
           parser->state = GRPC_CHTTP2_SPS_VAL2;
           return GRPC_ERROR_NONE;
         }
-        parser->value |= ((uint32_t)*cur) << 8;
+        parser->value |= (static_cast<uint32_t>(*cur)) << 8;
         cur++;
       /* fallthrough */
       case GRPC_CHTTP2_SPS_VAL3:
@@ -211,12 +212,12 @@ grpc_error* grpc_chttp2_settings_parser_parse(void* p, grpc_chttp2_transport* t,
           }
           if (id == GRPC_CHTTP2_SETTINGS_INITIAL_WINDOW_SIZE &&
               parser->incoming_settings[id] != parser->value) {
-            t->initial_window_update +=
-                (int64_t)parser->value - parser->incoming_settings[id];
+            t->initial_window_update += static_cast<int64_t>(parser->value) -
+                                        parser->incoming_settings[id];
             if (grpc_http_trace.enabled() || grpc_flowctl_trace.enabled()) {
               gpr_log(GPR_DEBUG, "%p[%s] adding %d for initial_window change",
                       t, t->is_client ? "cli" : "svr",
-                      (int)t->initial_window_update);
+                      static_cast<int>(t->initial_window_update));
             }
           }
           parser->incoming_settings[id] = parser->value;
diff --git a/src/core/ext/transport/chttp2/transport/frame_window_update.cc b/src/core/ext/transport/chttp2/transport/frame_window_update.cc
index 418ca144ce..95be5b42d2 100644
--- a/src/core/ext/transport/chttp2/transport/frame_window_update.cc
+++ b/src/core/ext/transport/chttp2/transport/frame_window_update.cc
@@ -37,14 +37,14 @@ grpc_slice grpc_chttp2_window_update_create(
   *p++ = 4;
   *p++ = GRPC_CHTTP2_FRAME_WINDOW_UPDATE;
   *p++ = 0;
-  *p++ = (uint8_t)(id >> 24);
-  *p++ = (uint8_t)(id >> 16);
-  *p++ = (uint8_t)(id >> 8);
-  *p++ = (uint8_t)(id);
-  *p++ = (uint8_t)(window_update >> 24);
-  *p++ = (uint8_t)(window_update >> 16);
-  *p++ = (uint8_t)(window_update >> 8);
-  *p++ = (uint8_t)(window_update);
+  *p++ = static_cast<uint8_t>(id >> 24);
+  *p++ = static_cast<uint8_t>(id >> 16);
+  *p++ = static_cast<uint8_t>(id >> 8);
+  *p++ = static_cast<uint8_t>(id);
+  *p++ = static_cast<uint8_t>(window_update >> 24);
+  *p++ = static_cast<uint8_t>(window_update >> 16);
+  *p++ = static_cast<uint8_t>(window_update >> 8);
+  *p++ = static_cast<uint8_t>(window_update);
 
   return slice;
 }
@@ -73,16 +73,16 @@ grpc_error* grpc_chttp2_window_update_parser_parse(void* parser,
   uint8_t* const end = GRPC_SLICE_END_PTR(slice);
   uint8_t* cur = beg;
   grpc_chttp2_window_update_parser* p =
-      (grpc_chttp2_window_update_parser*)parser;
+      static_cast<grpc_chttp2_window_update_parser*>(parser);
 
   while (p->byte != 4 && cur != end) {
-    p->amount |= ((uint32_t)*cur) << (8 * (3 - p->byte));
+    p->amount |= (static_cast<uint32_t>(*cur)) << (8 * (3 - p->byte));
     cur++;
     p->byte++;
   }
 
   if (s != nullptr) {
-    s->stats.incoming.framing_bytes += (uint32_t)(end - cur);
+    s->stats.incoming.framing_bytes += static_cast<uint32_t>(end - cur);
   }
 
   if (p->byte == 4) {
diff --git a/src/core/ext/transport/chttp2/transport/hpack_encoder.cc b/src/core/ext/transport/chttp2/transport/hpack_encoder.cc
index ba6b43b1dd..4855455130 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_encoder.cc
+++ b/src/core/ext/transport/chttp2/transport/hpack_encoder.cc
@@ -78,15 +78,15 @@ typedef struct {
 static void fill_header(uint8_t* p, uint8_t type, uint32_t id, size_t len,
                         uint8_t flags) {
   GPR_ASSERT(len < 16777316);
-  *p++ = (uint8_t)(len >> 16);
-  *p++ = (uint8_t)(len >> 8);
-  *p++ = (uint8_t)(len);
+  *p++ = static_cast<uint8_t>(len >> 16);
+  *p++ = static_cast<uint8_t>(len >> 8);
+  *p++ = static_cast<uint8_t>(len);
   *p++ = type;
   *p++ = flags;
-  *p++ = (uint8_t)(id >> 24);
-  *p++ = (uint8_t)(id >> 16);
-  *p++ = (uint8_t)(id >> 8);
-  *p++ = (uint8_t)(id);
+  *p++ = static_cast<uint8_t>(id >> 24);
+  *p++ = static_cast<uint8_t>(id >> 16);
+  *p++ = static_cast<uint8_t>(id >> 8);
+  *p++ = static_cast<uint8_t>(id);
 }
 
 /* finish a frame - fill in the previously reserved header */
@@ -98,8 +98,9 @@ static void finish_frame(framer_state* st, int is_header_boundary,
   fill_header(
       GRPC_SLICE_START_PTR(st->output->slices[st->header_idx]), type,
       st->stream_id, st->output->length - st->output_length_at_start_of_frame,
-      (uint8_t)((is_last_in_stream ? GRPC_CHTTP2_DATA_FLAG_END_STREAM : 0) |
-                (is_header_boundary ? GRPC_CHTTP2_DATA_FLAG_END_HEADERS : 0)));
+      static_cast<uint8_t>(
+          (is_last_in_stream ? GRPC_CHTTP2_DATA_FLAG_END_STREAM : 0) |
+          (is_header_boundary ? GRPC_CHTTP2_DATA_FLAG_END_HEADERS : 0)));
   st->stats->framing_bytes += 9;
   st->is_first_frame = 0;
 }
@@ -169,9 +170,9 @@ static void evict_entry(grpc_chttp2_hpack_compressor* c) {
   GPR_ASSERT(c->table_size >=
              c->table_elem_size[c->tail_remote_index % c->cap_table_elems]);
   GPR_ASSERT(c->table_elems > 0);
-  c->table_size =
-      (uint16_t)(c->table_size -
-                 c->table_elem_size[c->tail_remote_index % c->cap_table_elems]);
+  c->table_size = static_cast<uint16_t>(
+      c->table_size -
+      c->table_elem_size[c->tail_remote_index % c->cap_table_elems]);
   c->table_elems--;
 }
 
@@ -197,8 +198,9 @@ static uint32_t prepare_space_for_new_elem(grpc_chttp2_hpack_compressor* c,
     evict_entry(c);
   }
   GPR_ASSERT(c->table_elems < c->max_table_size);
-  c->table_elem_size[new_index % c->cap_table_elems] = (uint16_t)elem_size;
-  c->table_size = (uint16_t)(c->table_size + elem_size);
+  c->table_elem_size[new_index % c->cap_table_elems] =
+      static_cast<uint16_t>(elem_size);
+  c->table_size = static_cast<uint16_t>(c->table_size + elem_size);
   c->table_elems++;
 
   return new_index;
@@ -394,9 +396,9 @@ static void emit_lithdr_incidx_v(grpc_chttp2_hpack_compressor* c,
   GPR_ASSERT(unused_index == 0);
   GRPC_STATS_INC_HPACK_SEND_LITHDR_INCIDX_V();
   GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED();
-  uint32_t len_key = (uint32_t)GRPC_SLICE_LENGTH(GRPC_MDKEY(elem));
+  uint32_t len_key = static_cast<uint32_t> GRPC_SLICE_LENGTH(GRPC_MDKEY(elem));
   wire_value value = get_wire_value(elem, st->use_true_binary_metadata);
-  uint32_t len_val = (uint32_t)wire_value_length(value);
+  uint32_t len_val = static_cast<uint32_t>(wire_value_length(value));
   uint32_t len_key_len = GRPC_CHTTP2_VARINT_LENGTH(len_key, 1);
   uint32_t len_val_len = GRPC_CHTTP2_VARINT_LENGTH(len_val, 1);
   GPR_ASSERT(len_key <= UINT32_MAX);
@@ -416,9 +418,9 @@ static void emit_lithdr_noidx_v(grpc_chttp2_hpack_compressor* c,
   GPR_ASSERT(unused_index == 0);
   GRPC_STATS_INC_HPACK_SEND_LITHDR_NOTIDX_V();
   GRPC_STATS_INC_HPACK_SEND_UNCOMPRESSED();
-  uint32_t len_key = (uint32_t)GRPC_SLICE_LENGTH(GRPC_MDKEY(elem));
+  uint32_t len_key = static_cast<uint32_t> GRPC_SLICE_LENGTH(GRPC_MDKEY(elem));
   wire_value value = get_wire_value(elem, st->use_true_binary_metadata);
-  uint32_t len_val = (uint32_t)wire_value_length(value);
+  uint32_t len_val = static_cast<uint32_t>(wire_value_length(value));
   uint32_t len_key_len = GRPC_CHTTP2_VARINT_LENGTH(len_key, 1);
   uint32_t len_val_len = GRPC_CHTTP2_VARINT_LENGTH(len_val, 1);
   GPR_ASSERT(len_key <= UINT32_MAX);
@@ -583,8 +585,8 @@ void grpc_chttp2_hpack_compressor_init(grpc_chttp2_hpack_compressor* c) {
   c->cap_table_elems = elems_for_bytes(c->max_table_size);
   c->max_table_elems = c->cap_table_elems;
   c->max_usable_size = GRPC_CHTTP2_HPACKC_INITIAL_TABLE_SIZE;
-  c->table_elem_size =
-      (uint16_t*)gpr_malloc(sizeof(*c->table_elem_size) * c->cap_table_elems);
+  c->table_elem_size = static_cast<uint16_t*>(
+      gpr_malloc(sizeof(*c->table_elem_size) * c->cap_table_elems));
   memset(c->table_elem_size, 0,
          sizeof(*c->table_elem_size) * c->cap_table_elems);
   for (size_t i = 0; i < GPR_ARRAY_SIZE(c->entries_keys); i++) {
@@ -612,7 +614,7 @@ void grpc_chttp2_hpack_compressor_set_max_usable_size(
 
 static void rebuild_elems(grpc_chttp2_hpack_compressor* c, uint32_t new_cap) {
   uint16_t* table_elem_size =
-      (uint16_t*)gpr_malloc(sizeof(*table_elem_size) * new_cap);
+      static_cast<uint16_t*>(gpr_malloc(sizeof(*table_elem_size) * new_cap));
   uint32_t i;
 
   memset(table_elem_size, 0, sizeof(*table_elem_size) * new_cap);
diff --git a/src/core/ext/transport/chttp2/transport/hpack_parser.cc b/src/core/ext/transport/chttp2/transport/hpack_parser.cc
index 66cc2884e1..26a38e3f87 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_parser.cc
+++ b/src/core/ext/transport/chttp2/transport/hpack_parser.cc
@@ -757,8 +757,9 @@ static grpc_error* finish_indexed_field(grpc_chttp2_hpack_parser* p,
     return grpc_error_set_int(
         grpc_error_set_int(GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                                "Invalid HPACK index received"),
-                           GRPC_ERROR_INT_INDEX, (intptr_t)p->index),
-        GRPC_ERROR_INT_SIZE, (intptr_t)p->table.num_ents);
+                           GRPC_ERROR_INT_INDEX,
+                           static_cast<intptr_t>(p->index)),
+        GRPC_ERROR_INT_SIZE, static_cast<intptr_t>(p->table.num_ents));
   }
   GRPC_MDELEM_REF(md);
   GRPC_STATS_INC_HPACK_RECV_INDEXED();
@@ -1087,7 +1088,7 @@ static grpc_error* parse_value1(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
     return GRPC_ERROR_NONE;
   }
 
-  *p->parsing.value += (((uint32_t)*cur) & 0x7f) << 7;
+  *p->parsing.value += ((static_cast<uint32_t>(*cur)) & 0x7f) << 7;
 
   if ((*cur) & 0x80) {
     return parse_value2(p, cur + 1, end);
@@ -1105,7 +1106,7 @@ static grpc_error* parse_value2(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
     return GRPC_ERROR_NONE;
   }
 
-  *p->parsing.value += (((uint32_t)*cur) & 0x7f) << 14;
+  *p->parsing.value += ((static_cast<uint32_t>(*cur)) & 0x7f) << 14;
 
   if ((*cur) & 0x80) {
     return parse_value3(p, cur + 1, end);
@@ -1123,7 +1124,7 @@ static grpc_error* parse_value3(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
     return GRPC_ERROR_NONE;
   }
 
-  *p->parsing.value += (((uint32_t)*cur) & 0x7f) << 21;
+  *p->parsing.value += ((static_cast<uint32_t>(*cur)) & 0x7f) << 21;
 
   if ((*cur) & 0x80) {
     return parse_value4(p, cur + 1, end);
@@ -1152,7 +1153,7 @@ static grpc_error* parse_value4(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
   }
 
   cur_value = *p->parsing.value;
-  add_value = ((uint32_t)c) << 28;
+  add_value = (static_cast<uint32_t>(c)) << 28;
   if (add_value > 0xffffffffu - cur_value) {
     goto error;
   }
@@ -1227,13 +1228,14 @@ static void append_bytes(grpc_chttp2_hpack_parser_string* str,
   if (length == 0) return;
   if (length + str->data.copied.length > str->data.copied.capacity) {
     GPR_ASSERT(str->data.copied.length + length <= UINT32_MAX);
-    str->data.copied.capacity = (uint32_t)(str->data.copied.length + length);
-    str->data.copied.str =
-        (char*)gpr_realloc(str->data.copied.str, str->data.copied.capacity);
+    str->data.copied.capacity =
+        static_cast<uint32_t>(str->data.copied.length + length);
+    str->data.copied.str = static_cast<char*>(
+        gpr_realloc(str->data.copied.str, str->data.copied.capacity));
   }
   memcpy(str->data.copied.str + str->data.copied.length, data, length);
   GPR_ASSERT(length <= UINT32_MAX - str->data.copied.length);
-  str->data.copied.length += (uint32_t)length;
+  str->data.copied.length += static_cast<uint32_t>(length);
 }
 
 static grpc_error* append_string(grpc_chttp2_hpack_parser* p,
@@ -1241,9 +1243,9 @@ static grpc_error* append_string(grpc_chttp2_hpack_parser* p,
   grpc_chttp2_hpack_parser_string* str = p->parsing.str;
   uint32_t bits;
   uint8_t decoded[3];
-  switch ((binary_state)p->binary) {
+  switch (static_cast<binary_state>(p->binary)) {
     case NOT_BINARY:
-      append_bytes(str, cur, (size_t)(end - cur));
+      append_bytes(str, cur, static_cast<size_t>(end - cur));
       return GRPC_ERROR_NONE;
     case BINARY_BEGIN:
       if (cur == end) {
@@ -1255,7 +1257,7 @@ static grpc_error* append_string(grpc_chttp2_hpack_parser* p,
         ++cur;
         p->binary = NOT_BINARY;
         GRPC_STATS_INC_HPACK_RECV_BINARY();
-        append_bytes(str, cur, (size_t)(end - cur));
+        append_bytes(str, cur, static_cast<size_t>(end - cur));
         return GRPC_ERROR_NONE;
       }
       GRPC_STATS_INC_HPACK_RECV_BINARY_BASE64();
@@ -1324,9 +1326,9 @@ static grpc_error* append_string(grpc_chttp2_hpack_parser* p,
         goto b64_byte3;
       p->base64_buffer |= bits;
       bits = p->base64_buffer;
-      decoded[0] = (uint8_t)(bits >> 16);
-      decoded[1] = (uint8_t)(bits >> 8);
-      decoded[2] = (uint8_t)(bits);
+      decoded[0] = static_cast<uint8_t>(bits >> 16);
+      decoded[1] = static_cast<uint8_t>(bits >> 8);
+      decoded[2] = static_cast<uint8_t>(bits);
       append_bytes(str, decoded, 3);
       goto b64_byte0;
   }
@@ -1340,7 +1342,7 @@ static grpc_error* finish_str(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
   uint8_t decoded[2];
   uint32_t bits;
   grpc_chttp2_hpack_parser_string* str = p->parsing.str;
-  switch ((binary_state)p->binary) {
+  switch (static_cast<binary_state>(p->binary)) {
     case NOT_BINARY:
       break;
     case BINARY_BEGIN:
@@ -1361,7 +1363,7 @@ static grpc_error* finish_str(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
         gpr_free(msg);
         return parse_error(p, cur, end, err);
       }
-      decoded[0] = (uint8_t)(bits >> 16);
+      decoded[0] = static_cast<uint8_t>(bits >> 16);
       append_bytes(str, decoded, 1);
       break;
     case B64_BYTE3:
@@ -1374,8 +1376,8 @@ static grpc_error* finish_str(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
         gpr_free(msg);
         return parse_error(p, cur, end, err);
       }
-      decoded[0] = (uint8_t)(bits >> 16);
-      decoded[1] = (uint8_t)(bits >> 8);
+      decoded[0] = static_cast<uint8_t>(bits >> 16);
+      decoded[1] = static_cast<uint8_t>(bits >> 8);
       append_bytes(str, decoded, 2);
       break;
   }
@@ -1388,7 +1390,7 @@ static grpc_error* huff_nibble(grpc_chttp2_hpack_parser* p, uint8_t nibble) {
   int16_t next = next_sub_tbl[16 * next_tbl[p->huff_state] + nibble];
   if (emit != -1) {
     if (emit >= 0 && emit < 256) {
-      uint8_t c = (uint8_t)emit;
+      uint8_t c = static_cast<uint8_t>(emit);
       grpc_error* err = append_string(p, &c, (&c) + 1);
       if (err != GRPC_ERROR_NONE) return err;
     } else {
@@ -1426,7 +1428,7 @@ static grpc_error* add_str_bytes(grpc_chttp2_hpack_parser* p,
 static grpc_error* parse_string(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
                                 const uint8_t* end) {
   size_t remaining = p->strlen - p->strgot;
-  size_t given = (size_t)(end - cur);
+  size_t given = static_cast<size_t>(end - cur);
   if (remaining <= given) {
     grpc_error* err = add_str_bytes(p, cur, cur + remaining);
     if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
@@ -1437,7 +1439,7 @@ static grpc_error* parse_string(grpc_chttp2_hpack_parser* p, const uint8_t* cur,
     grpc_error* err = add_str_bytes(p, cur, cur + given);
     if (err != GRPC_ERROR_NONE) return parse_error(p, cur, end, err);
     GPR_ASSERT(given <= UINT32_MAX - p->strgot);
-    p->strgot += (uint32_t)given;
+    p->strgot += static_cast<uint32_t>(given);
     p->state = parse_string;
     return GRPC_ERROR_NONE;
   }
@@ -1448,12 +1450,13 @@ static grpc_error* begin_parse_string(grpc_chttp2_hpack_parser* p,
                                       const uint8_t* cur, const uint8_t* end,
                                       uint8_t binary,
                                       grpc_chttp2_hpack_parser_string* str) {
-  if (!p->huff && binary == NOT_BINARY && (end - cur) >= (intptr_t)p->strlen &&
+  if (!p->huff && binary == NOT_BINARY &&
+      (end - cur) >= static_cast<intptr_t>(p->strlen) &&
       p->current_slice_refcount != nullptr) {
     GRPC_STATS_INC_HPACK_RECV_UNCOMPRESSED();
     str->copied = false;
     str->data.referenced.refcount = p->current_slice_refcount;
-    str->data.referenced.data.refcounted.bytes = (uint8_t*)cur;
+    str->data.referenced.data.refcounted.bytes = const_cast<uint8_t*>(cur);
     str->data.referenced.data.refcounted.length = p->strlen;
     grpc_slice_ref_internal(str->data.referenced);
     return parse_next(p, cur + p->strlen, end);
@@ -1503,8 +1506,9 @@ static grpc_error* is_binary_indexed_header(grpc_chttp2_hpack_parser* p,
     return grpc_error_set_int(
         grpc_error_set_int(GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                                "Invalid HPACK index received"),
-                           GRPC_ERROR_INT_INDEX, (intptr_t)p->index),
-        GRPC_ERROR_INT_SIZE, (intptr_t)p->table.num_ents);
+                           GRPC_ERROR_INT_INDEX,
+                           static_cast<intptr_t>(p->index)),
+        GRPC_ERROR_INT_SIZE, static_cast<intptr_t>(p->table.num_ents));
   }
   *is = grpc_is_binary_header(GRPC_MDKEY(elem));
   return GRPC_ERROR_NONE;
@@ -1589,7 +1593,7 @@ static const maybe_complete_func_type maybe_complete_funcs[] = {
     grpc_chttp2_maybe_complete_recv_trailing_metadata};
 
 static void force_client_rst_stream(void* sp, grpc_error* error) {
-  grpc_chttp2_stream* s = (grpc_chttp2_stream*)sp;
+  grpc_chttp2_stream* s = static_cast<grpc_chttp2_stream*>(sp);
   grpc_chttp2_transport* t = s->t;
   if (!s->write_closed) {
     grpc_slice_buffer_add(
@@ -1618,7 +1622,8 @@ grpc_error* grpc_chttp2_header_parser_parse(void* hpack_parser,
                                             grpc_chttp2_stream* s,
                                             grpc_slice slice, int is_last) {
   GPR_TIMER_SCOPE("grpc_chttp2_hpack_parser_parse", 0);
-  grpc_chttp2_hpack_parser* parser = (grpc_chttp2_hpack_parser*)hpack_parser;
+  grpc_chttp2_hpack_parser* parser =
+      static_cast<grpc_chttp2_hpack_parser*>(hpack_parser);
   if (s != nullptr) {
     s->stats.incoming.header_bytes += GRPC_SLICE_LENGTH(slice);
   }
diff --git a/src/core/ext/transport/chttp2/transport/hpack_table.cc b/src/core/ext/transport/chttp2/transport/hpack_table.cc
index 9fad158d27..d7cabbde04 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_table.cc
+++ b/src/core/ext/transport/chttp2/transport/hpack_table.cc
@@ -173,7 +173,8 @@ void grpc_chttp2_hptbl_init(grpc_chttp2_hptbl* tbl) {
       GRPC_CHTTP2_INITIAL_HPACK_TABLE_SIZE;
   tbl->max_entries = tbl->cap_entries =
       entries_for_bytes(tbl->current_table_bytes);
-  tbl->ents = (grpc_mdelem*)gpr_malloc(sizeof(*tbl->ents) * tbl->cap_entries);
+  tbl->ents = static_cast<grpc_mdelem*>(
+      gpr_malloc(sizeof(*tbl->ents) * tbl->cap_entries));
   memset(tbl->ents, 0, sizeof(*tbl->ents) * tbl->cap_entries);
   for (i = 1; i <= GRPC_CHTTP2_LAST_STATIC_ENTRY; i++) {
     tbl->static_ents[i - 1] = grpc_mdelem_from_slices(
@@ -218,14 +219,15 @@ static void evict1(grpc_chttp2_hptbl* tbl) {
                       GRPC_SLICE_LENGTH(GRPC_MDVALUE(first_ent)) +
                       GRPC_CHTTP2_HPACK_ENTRY_OVERHEAD;
   GPR_ASSERT(elem_bytes <= tbl->mem_used);
-  tbl->mem_used -= (uint32_t)elem_bytes;
+  tbl->mem_used -= static_cast<uint32_t>(elem_bytes);
   tbl->first_ent = ((tbl->first_ent + 1) % tbl->cap_entries);
   tbl->num_ents--;
   GRPC_MDELEM_UNREF(first_ent);
 }
 
 static void rebuild_ents(grpc_chttp2_hptbl* tbl, uint32_t new_cap) {
-  grpc_mdelem* ents = (grpc_mdelem*)gpr_malloc(sizeof(*ents) * new_cap);
+  grpc_mdelem* ents =
+      static_cast<grpc_mdelem*>(gpr_malloc(sizeof(*ents) * new_cap));
   uint32_t i;
 
   for (i = 0; i < tbl->num_ents; i++) {
@@ -320,7 +322,8 @@ grpc_error* grpc_chttp2_hptbl_add(grpc_chttp2_hptbl* tbl, grpc_mdelem md) {
   }
 
   /* evict entries to ensure no overflow */
-  while (elem_bytes > (size_t)tbl->current_table_bytes - tbl->mem_used) {
+  while (elem_bytes >
+         static_cast<size_t>(tbl->current_table_bytes) - tbl->mem_used) {
     evict1(tbl);
   }
 
@@ -330,7 +333,7 @@ grpc_error* grpc_chttp2_hptbl_add(grpc_chttp2_hptbl* tbl, grpc_mdelem md) {
 
   /* update accounting values */
   tbl->num_ents++;
-  tbl->mem_used += (uint32_t)elem_bytes;
+  tbl->mem_used += static_cast<uint32_t>(elem_bytes);
   return GRPC_ERROR_NONE;
 }
 
@@ -350,8 +353,8 @@ grpc_chttp2_hptbl_find_result grpc_chttp2_hptbl_find(
 
   /* Scan the dynamic table */
   for (i = 0; i < tbl->num_ents; i++) {
-    uint32_t idx =
-        (uint32_t)(tbl->num_ents - i + GRPC_CHTTP2_LAST_STATIC_ENTRY);
+    uint32_t idx = static_cast<uint32_t>(tbl->num_ents - i +
+                                         GRPC_CHTTP2_LAST_STATIC_ENTRY);
     grpc_mdelem ent = tbl->ents[(tbl->first_ent + i) % tbl->cap_entries];
     if (!grpc_slice_eq(GRPC_MDKEY(md), GRPC_MDKEY(ent))) continue;
     r.index = idx;
diff --git a/src/core/ext/transport/chttp2/transport/http2_settings.cc b/src/core/ext/transport/chttp2/transport/http2_settings.cc
index 4248496f48..745b1656f9 100644
--- a/src/core/ext/transport/chttp2/transport/http2_settings.cc
+++ b/src/core/ext/transport/chttp2/transport/http2_settings.cc
@@ -35,7 +35,7 @@ bool grpc_wire_id_to_setting_id(uint32_t wire_id, grpc_chttp2_setting_id* out) {
       h += 4;
       break;
   }
-  *out = (grpc_chttp2_setting_id)h;
+  *out = static_cast<grpc_chttp2_setting_id>(h);
   return h < GPR_ARRAY_SIZE(grpc_setting_id_to_wire_id) &&
          grpc_setting_id_to_wire_id[h] == wire_id;
 }
diff --git a/src/core/ext/transport/chttp2/transport/incoming_metadata.cc b/src/core/ext/transport/chttp2/transport/incoming_metadata.cc
index ef0c9ed230..18d89f06d8 100644
--- a/src/core/ext/transport/chttp2/transport/incoming_metadata.cc
+++ b/src/core/ext/transport/chttp2/transport/incoming_metadata.cc
@@ -42,8 +42,8 @@ grpc_error* grpc_chttp2_incoming_metadata_buffer_add(
   buffer->size += GRPC_MDELEM_LENGTH(elem);
   return grpc_metadata_batch_add_tail(
       &buffer->batch,
-      (grpc_linked_mdelem*)gpr_arena_alloc(buffer->arena,
-                                           sizeof(grpc_linked_mdelem)),
+      static_cast<grpc_linked_mdelem*>(
+          gpr_arena_alloc(buffer->arena, sizeof(grpc_linked_mdelem))),
       elem);
 }
 
diff --git a/src/core/ext/transport/chttp2/transport/parsing.cc b/src/core/ext/transport/chttp2/transport/parsing.cc
index fb6d30b62d..9357fedb5c 100644
--- a/src/core/ext/transport/chttp2/transport/parsing.cc
+++ b/src/core/ext/transport/chttp2/transport/parsing.cc
@@ -88,15 +88,16 @@ grpc_error* grpc_chttp2_perform_read(grpc_chttp2_transport* t,
               "Connect string mismatch: expected '%c' (%d) got '%c' (%d) "
               "at byte %d",
               GRPC_CHTTP2_CLIENT_CONNECT_STRING[t->deframe_state],
-              (int)(uint8_t)GRPC_CHTTP2_CLIENT_CONNECT_STRING[t->deframe_state],
-              *cur, (int)*cur, t->deframe_state);
+              static_cast<int>(static_cast<uint8_t>(
+                  GRPC_CHTTP2_CLIENT_CONNECT_STRING[t->deframe_state])),
+              *cur, static_cast<int>(*cur), t->deframe_state);
           err = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
           gpr_free(msg);
           return err;
         }
         ++cur;
-        t->deframe_state =
-            (grpc_chttp2_deframe_transport_state)(1 + (int)t->deframe_state);
+        t->deframe_state = static_cast<grpc_chttp2_deframe_transport_state>(
+            1 + static_cast<int>(t->deframe_state));
       }
       if (cur == end) {
         return GRPC_ERROR_NONE;
@@ -105,7 +106,7 @@ grpc_error* grpc_chttp2_perform_read(grpc_chttp2_transport* t,
     dts_fh_0:
     case GRPC_DTS_FH_0:
       GPR_ASSERT(cur < end);
-      t->incoming_frame_size = ((uint32_t)*cur) << 16;
+      t->incoming_frame_size = (static_cast<uint32_t>(*cur)) << 16;
       if (++cur == end) {
         t->deframe_state = GRPC_DTS_FH_1;
         return GRPC_ERROR_NONE;
@@ -113,7 +114,7 @@ grpc_error* grpc_chttp2_perform_read(grpc_chttp2_transport* t,
     /* fallthrough */
     case GRPC_DTS_FH_1:
       GPR_ASSERT(cur < end);
-      t->incoming_frame_size |= ((uint32_t)*cur) << 8;
+      t->incoming_frame_size |= (static_cast<uint32_t>(*cur)) << 8;
       if (++cur == end) {
         t->deframe_state = GRPC_DTS_FH_2;
         return GRPC_ERROR_NONE;
@@ -145,7 +146,7 @@ grpc_error* grpc_chttp2_perform_read(grpc_chttp2_transport* t,
     /* fallthrough */
     case GRPC_DTS_FH_5:
       GPR_ASSERT(cur < end);
-      t->incoming_stream_id = (((uint32_t)*cur) & 0x7f) << 24;
+      t->incoming_stream_id = ((static_cast<uint32_t>(*cur)) & 0x7f) << 24;
       if (++cur == end) {
         t->deframe_state = GRPC_DTS_FH_6;
         return GRPC_ERROR_NONE;
@@ -153,7 +154,7 @@ grpc_error* grpc_chttp2_perform_read(grpc_chttp2_transport* t,
     /* fallthrough */
     case GRPC_DTS_FH_6:
       GPR_ASSERT(cur < end);
-      t->incoming_stream_id |= ((uint32_t)*cur) << 16;
+      t->incoming_stream_id |= (static_cast<uint32_t>(*cur)) << 16;
       if (++cur == end) {
         t->deframe_state = GRPC_DTS_FH_7;
         return GRPC_ERROR_NONE;
@@ -161,7 +162,7 @@ grpc_error* grpc_chttp2_perform_read(grpc_chttp2_transport* t,
     /* fallthrough */
     case GRPC_DTS_FH_7:
       GPR_ASSERT(cur < end);
-      t->incoming_stream_id |= ((uint32_t)*cur) << 8;
+      t->incoming_stream_id |= (static_cast<uint32_t>(*cur)) << 8;
       if (++cur == end) {
         t->deframe_state = GRPC_DTS_FH_8;
         return GRPC_ERROR_NONE;
@@ -169,7 +170,7 @@ grpc_error* grpc_chttp2_perform_read(grpc_chttp2_transport* t,
     /* fallthrough */
     case GRPC_DTS_FH_8:
       GPR_ASSERT(cur < end);
-      t->incoming_stream_id |= ((uint32_t)*cur);
+      t->incoming_stream_id |= (static_cast<uint32_t>(*cur));
       t->deframe_state = GRPC_DTS_FRAME;
       err = init_frame_parser(t);
       if (err != GRPC_ERROR_NONE) {
@@ -205,20 +206,20 @@ grpc_error* grpc_chttp2_perform_read(grpc_chttp2_transport* t,
     /* fallthrough */
     case GRPC_DTS_FRAME:
       GPR_ASSERT(cur < end);
-      if ((uint32_t)(end - cur) == t->incoming_frame_size) {
-        err =
-            parse_frame_slice(t,
-                              grpc_slice_sub_no_ref(slice, (size_t)(cur - beg),
-                                                    (size_t)(end - beg)),
-                              1);
+      if (static_cast<uint32_t>(end - cur) == t->incoming_frame_size) {
+        err = parse_frame_slice(
+            t,
+            grpc_slice_sub_no_ref(slice, static_cast<size_t>(cur - beg),
+                                  static_cast<size_t>(end - beg)),
+            1);
         if (err != GRPC_ERROR_NONE) {
           return err;
         }
         t->deframe_state = GRPC_DTS_FH_0;
         t->incoming_stream = nullptr;
         return GRPC_ERROR_NONE;
-      } else if ((uint32_t)(end - cur) > t->incoming_frame_size) {
-        size_t cur_offset = (size_t)(cur - beg);
+      } else if (static_cast<uint32_t>(end - cur) > t->incoming_frame_size) {
+        size_t cur_offset = static_cast<size_t>(cur - beg);
         err = parse_frame_slice(
             t,
             grpc_slice_sub_no_ref(slice, cur_offset,
@@ -231,15 +232,15 @@ grpc_error* grpc_chttp2_perform_read(grpc_chttp2_transport* t,
         t->incoming_stream = nullptr;
         goto dts_fh_0; /* loop */
       } else {
-        err =
-            parse_frame_slice(t,
-                              grpc_slice_sub_no_ref(slice, (size_t)(cur - beg),
-                                                    (size_t)(end - beg)),
-                              0);
+        err = parse_frame_slice(
+            t,
+            grpc_slice_sub_no_ref(slice, static_cast<size_t>(cur - beg),
+                                  static_cast<size_t>(end - beg)),
+            0);
         if (err != GRPC_ERROR_NONE) {
           return err;
         }
-        t->incoming_frame_size -= (uint32_t)(end - cur);
+        t->incoming_frame_size -= static_cast<uint32_t>(end - cur);
         return GRPC_ERROR_NONE;
       }
       GPR_UNREACHABLE_CODE(return nullptr);
@@ -325,7 +326,7 @@ static grpc_error* init_skip_frame_parser(grpc_chttp2_transport* t,
     t->hpack_parser.on_header = skip_header;
     t->hpack_parser.on_header_user_data = nullptr;
     t->hpack_parser.is_boundary = is_eoh;
-    t->hpack_parser.is_eof = (uint8_t)(is_eoh ? t->header_eof : 0);
+    t->hpack_parser.is_eof = static_cast<uint8_t>(is_eoh ? t->header_eof : 0);
   } else {
     t->parser = skip_parser;
   }
@@ -394,7 +395,7 @@ static void free_timeout(void* p) { gpr_free(p); }
 static void on_initial_header(void* tp, grpc_mdelem md) {
   GPR_TIMER_SCOPE("on_initial_header", 0);
 
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
+  grpc_chttp2_transport* t = static_cast<grpc_chttp2_transport*>(tp);
   grpc_chttp2_stream* s = t->incoming_stream;
   GPR_ASSERT(s != nullptr);
 
@@ -429,7 +430,8 @@ static void on_initial_header(void* tp, grpc_mdelem md) {
       }
       if (GRPC_MDELEM_IS_INTERNED(md)) {
         /* store the result */
-        cached_timeout = (grpc_millis*)gpr_malloc(sizeof(grpc_millis));
+        cached_timeout =
+            static_cast<grpc_millis*>(gpr_malloc(sizeof(grpc_millis)));
         *cached_timeout = timeout;
         grpc_mdelem_set_user_data(md, free_timeout, cached_timeout);
       }
@@ -474,7 +476,7 @@ static void on_initial_header(void* tp, grpc_mdelem md) {
 static void on_trailing_header(void* tp, grpc_mdelem md) {
   GPR_TIMER_SCOPE("on_trailing_header", 0);
 
-  grpc_chttp2_transport* t = (grpc_chttp2_transport*)tp;
+  grpc_chttp2_transport* t = static_cast<grpc_chttp2_transport*>(tp);
   grpc_chttp2_stream* s = t->incoming_stream;
   GPR_ASSERT(s != nullptr);
 
@@ -634,7 +636,7 @@ static grpc_error* init_header_frame_parser(grpc_chttp2_transport* t,
   }
   t->hpack_parser.on_header_user_data = t;
   t->hpack_parser.is_boundary = is_eoh;
-  t->hpack_parser.is_eof = (uint8_t)(is_eoh ? t->header_eof : 0);
+  t->hpack_parser.is_eof = static_cast<uint8_t>(is_eoh ? t->header_eof : 0);
   if (!is_continuation &&
       (t->incoming_frame_flags & GRPC_CHTTP2_FLAG_HAS_PRIORITY)) {
     grpc_chttp2_hpack_parser_set_has_priority(&t->hpack_parser);
diff --git a/src/core/ext/transport/chttp2/transport/stream_map.cc b/src/core/ext/transport/chttp2/transport/stream_map.cc
index d59ff405f5..a40eaffd5f 100644
--- a/src/core/ext/transport/chttp2/transport/stream_map.cc
+++ b/src/core/ext/transport/chttp2/transport/stream_map.cc
@@ -26,8 +26,10 @@
 void grpc_chttp2_stream_map_init(grpc_chttp2_stream_map* map,
                                  size_t initial_capacity) {
   GPR_ASSERT(initial_capacity > 1);
-  map->keys = (uint32_t*)gpr_malloc(sizeof(uint32_t) * initial_capacity);
-  map->values = (void**)gpr_malloc(sizeof(void*) * initial_capacity);
+  map->keys =
+      static_cast<uint32_t*>(gpr_malloc(sizeof(uint32_t) * initial_capacity));
+  map->values =
+      static_cast<void**>(gpr_malloc(sizeof(void*) * initial_capacity));
   map->count = 0;
   map->free = 0;
   map->capacity = initial_capacity;
@@ -71,10 +73,10 @@ void grpc_chttp2_stream_map_add(grpc_chttp2_stream_map* map, uint32_t key,
       /* resize when less than 25% of the table is free, because compaction
          won't help much */
       map->capacity = capacity = 3 * capacity / 2;
-      map->keys = keys =
-          (uint32_t*)gpr_realloc(keys, capacity * sizeof(uint32_t));
+      map->keys = keys = static_cast<uint32_t*>(
+          gpr_realloc(keys, capacity * sizeof(uint32_t)));
       map->values = values =
-          (void**)gpr_realloc(values, capacity * sizeof(void*));
+          static_cast<void**>(gpr_realloc(values, capacity * sizeof(void*)));
     }
   }
 
@@ -146,7 +148,7 @@ void* grpc_chttp2_stream_map_rand(grpc_chttp2_stream_map* map) {
     map->free = 0;
     GPR_ASSERT(map->count > 0);
   }
-  return map->values[((size_t)rand()) % map->count];
+  return map->values[(static_cast<size_t>(rand())) % map->count];
 }
 
 void grpc_chttp2_stream_map_for_each(grpc_chttp2_stream_map* map,
diff --git a/src/core/ext/transport/chttp2/transport/varint.cc b/src/core/ext/transport/chttp2/transport/varint.cc
index 0d94ddcbc3..621a8100c7 100644
--- a/src/core/ext/transport/chttp2/transport/varint.cc
+++ b/src/core/ext/transport/chttp2/transport/varint.cc
@@ -36,19 +36,19 @@ void grpc_chttp2_hpack_write_varint_tail(uint32_t tail_value, uint8_t* target,
                                          uint32_t tail_length) {
   switch (tail_length) {
     case 5:
-      target[4] = (uint8_t)((tail_value >> 28) | 0x80);
+      target[4] = static_cast<uint8_t>((tail_value >> 28) | 0x80);
     /* fallthrough */
     case 4:
-      target[3] = (uint8_t)((tail_value >> 21) | 0x80);
+      target[3] = static_cast<uint8_t>((tail_value >> 21) | 0x80);
     /* fallthrough */
     case 3:
-      target[2] = (uint8_t)((tail_value >> 14) | 0x80);
+      target[2] = static_cast<uint8_t>((tail_value >> 14) | 0x80);
     /* fallthrough */
     case 2:
-      target[1] = (uint8_t)((tail_value >> 7) | 0x80);
+      target[1] = static_cast<uint8_t>((tail_value >> 7) | 0x80);
     /* fallthrough */
     case 1:
-      target[0] = (uint8_t)((tail_value) | 0x80);
+      target[0] = static_cast<uint8_t>((tail_value) | 0x80);
   }
   target[tail_length - 1] &= 0x7f;
 }
diff --git a/src/core/ext/transport/chttp2/transport/writing.cc b/src/core/ext/transport/chttp2/transport/writing.cc
index 1d6c9b0582..42cba9ae60 100644
--- a/src/core/ext/transport/chttp2/transport/writing.cc
+++ b/src/core/ext/transport/chttp2/transport/writing.cc
@@ -83,8 +83,8 @@ static void maybe_initiate_ping(grpc_chttp2_transport* t) {
               "%s: Ping delayed [%p]: not enough time elapsed since last ping. "
               " Last ping %f: Next ping %f: Now %f",
               t->is_client ? "CLIENT" : "SERVER", t->peer_string,
-              (double)t->ping_state.last_ping_sent_time,
-              (double)next_allowed_ping, (double)now);
+              static_cast<double>(t->ping_state.last_ping_sent_time),
+              static_cast<double>(next_allowed_ping), static_cast<double>(now));
     }
     if (!t->ping_state.is_delayed_ping_timer_set) {
       t->ping_state.is_delayed_ping_timer_set = true;
@@ -147,7 +147,7 @@ static void report_stall(grpc_chttp2_transport* t, grpc_chttp2_stream* s,
       t->settings[GRPC_ACKED_SETTINGS]
                  [GRPC_CHTTP2_SETTINGS_INITIAL_WINDOW_SIZE],
       t->flow_control->remote_window(),
-      (uint32_t)GPR_MAX(
+      static_cast<uint32_t> GPR_MAX(
           0,
           s->flow_control->remote_window_delta() +
               (int64_t)t->settings[GRPC_PEER_SETTINGS]
@@ -310,14 +310,14 @@ class DataSendContext {
         sending_bytes_before_(s_->sending_bytes) {}
 
   uint32_t stream_remote_window() const {
-    return (uint32_t)GPR_MAX(
+    return static_cast<uint32_t> GPR_MAX(
         0, s_->flow_control->remote_window_delta() +
                (int64_t)t_->settings[GRPC_PEER_SETTINGS]
                                     [GRPC_CHTTP2_SETTINGS_INITIAL_WINDOW_SIZE]);
   }
 
   uint32_t max_outgoing() const {
-    return (uint32_t)GPR_MIN(
+    return static_cast<uint32_t> GPR_MIN(
         t_->settings[GRPC_PEER_SETTINGS][GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE],
         GPR_MIN(stream_remote_window(), t_->flow_control->remote_window()));
   }
@@ -325,8 +325,8 @@ class DataSendContext {
   bool AnyOutgoing() const { return max_outgoing() > 0; }
 
   void FlushCompressedBytes() {
-    uint32_t send_bytes =
-        (uint32_t)GPR_MIN(max_outgoing(), s_->compressed_data_buffer.length);
+    uint32_t send_bytes = static_cast<uint32_t> GPR_MIN(
+        max_outgoing(), s_->compressed_data_buffer.length);
     bool is_last_data_frame =
         (send_bytes == s_->compressed_data_buffer.length &&
          s_->flow_controlled_buffer.length == 0 &&
@@ -375,10 +375,11 @@ class DataSendContext {
   bool is_last_frame() const { return is_last_frame_; }
 
   void CallCallbacks() {
-    if (update_list(t_, s_,
-                    (int64_t)(s_->sending_bytes - sending_bytes_before_),
-                    &s_->on_flow_controlled_cbs,
-                    &s_->flow_controlled_bytes_flowed, GRPC_ERROR_NONE)) {
+    if (update_list(
+            t_, s_,
+            static_cast<int64_t>(s_->sending_bytes - sending_bytes_before_),
+            &s_->on_flow_controlled_cbs, &s_->flow_controlled_bytes_flowed,
+            GRPC_ERROR_NONE)) {
       write_context_->NoteScheduledResults();
     }
   }
@@ -624,8 +625,9 @@ void grpc_chttp2_end_write(grpc_chttp2_transport* t, grpc_error* error) {
 
   while (grpc_chttp2_list_pop_writing_stream(t, &s)) {
     if (s->sending_bytes != 0) {
-      update_list(t, s, (int64_t)s->sending_bytes, &s->on_write_finished_cbs,
-                  &s->flow_controlled_bytes_written, GRPC_ERROR_REF(error));
+      update_list(t, s, static_cast<int64_t>(s->sending_bytes),
+                  &s->on_write_finished_cbs, &s->flow_controlled_bytes_written,
+                  GRPC_ERROR_REF(error));
       s->sending_bytes = 0;
     }
     GRPC_CHTTP2_STREAM_UNREF(s, "chttp2_writing:end");
diff --git a/src/core/ext/transport/cronet/transport/cronet_transport.cc b/src/core/ext/transport/cronet/transport/cronet_transport.cc
index e23c07f16c..8904c122a7 100644
--- a/src/core/ext/transport/cronet/transport/cronet_transport.cc
+++ b/src/core/ext/transport/cronet/transport/cronet_transport.cc
@@ -284,7 +284,8 @@ static void maybe_flush_read(stream_obj* s) {
       CRONET_LOG(GPR_DEBUG, "%p: Flush read", s);
       s->state.flush_read = true;
       null_and_maybe_free_read_buffer(s);
-      s->state.rs.read_buffer = (char*)gpr_malloc(GRPC_FLUSH_READ_SIZE);
+      s->state.rs.read_buffer =
+          static_cast<char*>(gpr_malloc(GRPC_FLUSH_READ_SIZE));
       if (!s->state.pending_read_from_cronet) {
         CRONET_LOG(GPR_DEBUG, "bidirectional_stream_read(%p)", s->cbs);
         bidirectional_stream_read(s->cbs, s->state.rs.read_buffer,
@@ -309,8 +310,8 @@ static void add_to_storage(struct stream_obj* s,
   struct op_storage* storage = &s->storage;
   /* add new op at the beginning of the linked list. The memory is freed
   in remove_from_storage */
-  struct op_and_state* new_op =
-      (struct op_and_state*)gpr_malloc(sizeof(struct op_and_state));
+  struct op_and_state* new_op = static_cast<struct op_and_state*>(
+      gpr_malloc(sizeof(struct op_and_state)));
   memcpy(&new_op->op, op, sizeof(grpc_transport_stream_op_batch));
   memset(&new_op->state, 0, sizeof(new_op->state));
   new_op->s = s;
@@ -399,7 +400,7 @@ static void on_failed(bidirectional_stream* stream, int net_error) {
   gpr_log(GPR_ERROR, "on_failed(%p, %d)", stream, net_error);
   grpc_core::ExecCtx exec_ctx;
 
-  stream_obj* s = (stream_obj*)stream->annotation;
+  stream_obj* s = static_cast<stream_obj*>(stream->annotation);
   gpr_mu_lock(&s->mu);
   bidirectional_stream_destroy(s->cbs);
   s->state.state_callback_received[OP_FAILED] = true;
@@ -425,7 +426,7 @@ static void on_canceled(bidirectional_stream* stream) {
   CRONET_LOG(GPR_DEBUG, "on_canceled(%p)", stream);
   grpc_core::ExecCtx exec_ctx;
 
-  stream_obj* s = (stream_obj*)stream->annotation;
+  stream_obj* s = static_cast<stream_obj*>(stream->annotation);
   gpr_mu_lock(&s->mu);
   bidirectional_stream_destroy(s->cbs);
   s->state.state_callback_received[OP_CANCELED] = true;
@@ -451,7 +452,7 @@ static void on_succeeded(bidirectional_stream* stream) {
   CRONET_LOG(GPR_DEBUG, "on_succeeded(%p)", stream);
   grpc_core::ExecCtx exec_ctx;
 
-  stream_obj* s = (stream_obj*)stream->annotation;
+  stream_obj* s = static_cast<stream_obj*>(stream->annotation);
   gpr_mu_lock(&s->mu);
   bidirectional_stream_destroy(s->cbs);
   s->state.state_callback_received[OP_SUCCEEDED] = true;
@@ -468,8 +469,8 @@ static void on_succeeded(bidirectional_stream* stream) {
 static void on_stream_ready(bidirectional_stream* stream) {
   CRONET_LOG(GPR_DEBUG, "W: on_stream_ready(%p)", stream);
   grpc_core::ExecCtx exec_ctx;
-  stream_obj* s = (stream_obj*)stream->annotation;
-  grpc_cronet_transport* t = (grpc_cronet_transport*)s->curr_ct;
+  stream_obj* s = static_cast<stream_obj*>(stream->annotation);
+  grpc_cronet_transport* t = s->curr_ct;
   gpr_mu_lock(&s->mu);
   s->state.state_op_done[OP_SEND_INITIAL_METADATA] = true;
   s->state.state_callback_received[OP_SEND_INITIAL_METADATA] = true;
@@ -500,7 +501,7 @@ static void on_response_headers_received(
   grpc_core::ExecCtx exec_ctx;
   CRONET_LOG(GPR_DEBUG, "R: on_response_headers_received(%p, %p, %s)", stream,
              headers, negotiated_protocol);
-  stream_obj* s = (stream_obj*)stream->annotation;
+  stream_obj* s = static_cast<stream_obj*>(stream->annotation);
 
   /* Identify if this is a header or a trailer (in a trailer-only response case)
    */
@@ -550,7 +551,7 @@ static void on_response_headers_received(
 */
 static void on_write_completed(bidirectional_stream* stream, const char* data) {
   grpc_core::ExecCtx exec_ctx;
-  stream_obj* s = (stream_obj*)stream->annotation;
+  stream_obj* s = static_cast<stream_obj*>(stream->annotation);
   CRONET_LOG(GPR_DEBUG, "W: on_write_completed(%p, %s)", stream, data);
   gpr_mu_lock(&s->mu);
   if (s->state.ws.write_buffer) {
@@ -568,7 +569,7 @@ static void on_write_completed(bidirectional_stream* stream, const char* data) {
 static void on_read_completed(bidirectional_stream* stream, char* data,
                               int count) {
   grpc_core::ExecCtx exec_ctx;
-  stream_obj* s = (stream_obj*)stream->annotation;
+  stream_obj* s = static_cast<stream_obj*>(stream->annotation);
   CRONET_LOG(GPR_DEBUG, "R: on_read_completed(%p, %p, %d)", stream, data,
              count);
   gpr_mu_lock(&s->mu);
@@ -612,8 +613,8 @@ static void on_response_trailers_received(
   grpc_core::ExecCtx exec_ctx;
   CRONET_LOG(GPR_DEBUG, "R: on_response_trailers_received(%p,%p)", stream,
              trailers);
-  stream_obj* s = (stream_obj*)stream->annotation;
-  grpc_cronet_transport* t = (grpc_cronet_transport*)s->curr_ct;
+  stream_obj* s = static_cast<stream_obj*>(stream->annotation);
+  grpc_cronet_transport* t = s->curr_ct;
   gpr_mu_lock(&s->mu);
   memset(&s->state.rs.trailing_metadata, 0,
          sizeof(s->state.rs.trailing_metadata));
@@ -671,17 +672,18 @@ static void create_grpc_frame(grpc_slice_buffer* write_slice_buffer,
   size_t length = GRPC_SLICE_LENGTH(slice);
   *p_write_buffer_size = length + GRPC_HEADER_SIZE_IN_BYTES;
   /* This is freed in the on_write_completed callback */
-  char* write_buffer = (char*)gpr_malloc(length + GRPC_HEADER_SIZE_IN_BYTES);
+  char* write_buffer =
+      static_cast<char*>(gpr_malloc(length + GRPC_HEADER_SIZE_IN_BYTES));
   *pp_write_buffer = write_buffer;
-  uint8_t* p = (uint8_t*)write_buffer;
+  uint8_t* p = reinterpret_cast<uint8_t*>(write_buffer);
   /* Append 5 byte header */
   /* Compressed flag */
-  *p++ = (uint8_t)((flags & GRPC_WRITE_INTERNAL_COMPRESS) ? 1 : 0);
+  *p++ = static_cast<uint8_t>((flags & GRPC_WRITE_INTERNAL_COMPRESS) ? 1 : 0);
   /* Message length */
-  *p++ = (uint8_t)(length >> 24);
-  *p++ = (uint8_t)(length >> 16);
-  *p++ = (uint8_t)(length >> 8);
-  *p++ = (uint8_t)(length);
+  *p++ = static_cast<uint8_t>(length >> 24);
+  *p++ = static_cast<uint8_t>(length >> 16);
+  *p++ = static_cast<uint8_t>(length >> 8);
+  *p++ = static_cast<uint8_t>(length);
   /* append actual data */
   memcpy(p, GRPC_SLICE_START_PTR(slice), length);
   grpc_slice_unref_internal(slice);
@@ -704,8 +706,8 @@ static void convert_metadata_to_cronet_headers(
   /* Allocate enough memory. It is freed in the on_stream_ready callback
    */
   bidirectional_stream_header* headers =
-      (bidirectional_stream_header*)gpr_malloc(
-          sizeof(bidirectional_stream_header) * num_headers_available);
+      static_cast<bidirectional_stream_header*>(gpr_malloc(
+          sizeof(bidirectional_stream_header) * num_headers_available));
   *pp_headers = headers;
 
   /* Walk the linked list again, this time copying the header fields.
@@ -753,7 +755,7 @@ static void convert_metadata_to_cronet_headers(
       break;
     }
   }
-  *p_num_headers = (size_t)num_headers;
+  *p_num_headers = num_headers;
 }
 
 static void parse_grpc_header(const uint8_t* data, int* length,
@@ -762,10 +764,10 @@ static void parse_grpc_header(const uint8_t* data, int* length,
   const uint8_t* p = data + 1;
   *compressed = ((c & 0x01) == 0x01);
   *length = 0;
-  *length |= ((uint8_t)*p++) << 24;
-  *length |= ((uint8_t)*p++) << 16;
-  *length |= ((uint8_t)*p++) << 8;
-  *length |= ((uint8_t)*p++);
+  *length |= (*p++) << 24;
+  *length |= (*p++) << 16;
+  *length |= (*p++) << 8;
+  *length |= (*p++);
 }
 
 static bool header_has_authority(grpc_linked_mdelem* head) {
@@ -968,7 +970,7 @@ static bool op_can_be_run(grpc_transport_stream_op_batch* curr_op,
 static enum e_op_result execute_stream_op(struct op_and_state* oas) {
   grpc_transport_stream_op_batch* stream_op = &oas->op;
   struct stream_obj* s = oas->s;
-  grpc_cronet_transport* t = (grpc_cronet_transport*)s->curr_ct;
+  grpc_cronet_transport* t = s->curr_ct;
   struct op_state* stream_state = &s->state;
   enum e_op_result result = NO_ACTION_POSSIBLE;
   if (stream_op->send_initial_metadata &&
@@ -1050,7 +1052,7 @@ static enum e_op_result execute_stream_op(struct op_and_state* oas) {
                    stream_state->ws.write_buffer);
         stream_state->state_callback_received[OP_SEND_MESSAGE] = false;
         bidirectional_stream_write(s->cbs, stream_state->ws.write_buffer,
-                                   (int)write_buffer_size, false);
+                                   static_cast<int>(write_buffer_size), false);
         grpc_slice_buffer_destroy_internal(&write_slice_buffer);
         if (t->use_packet_coalescing) {
           if (!stream_op->send_trailing_metadata) {
@@ -1151,14 +1153,14 @@ static enum e_op_result execute_stream_op(struct op_and_state* oas) {
           stream_state->rs.remaining_bytes == 0) {
         /* Start a read operation for data */
         stream_state->rs.length_field_received = true;
-        parse_grpc_header((const uint8_t*)stream_state->rs.read_buffer,
-                          &stream_state->rs.length_field,
-                          &stream_state->rs.compressed);
+        parse_grpc_header(
+            reinterpret_cast<const uint8_t*>(stream_state->rs.read_buffer),
+            &stream_state->rs.length_field, &stream_state->rs.compressed);
         CRONET_LOG(GPR_DEBUG, "length field = %d",
                    stream_state->rs.length_field);
         if (stream_state->rs.length_field > 0) {
-          stream_state->rs.read_buffer =
-              (char*)gpr_malloc((size_t)stream_state->rs.length_field);
+          stream_state->rs.read_buffer = static_cast<char*>(
+              gpr_malloc(static_cast<size_t>(stream_state->rs.length_field)));
           GPR_ASSERT(stream_state->rs.read_buffer);
           stream_state->rs.remaining_bytes = stream_state->rs.length_field;
           stream_state->rs.received_bytes = 0;
@@ -1181,8 +1183,9 @@ static enum e_op_result execute_stream_op(struct op_and_state* oas) {
           if (stream_state->rs.compressed) {
             stream_state->rs.sbs.base.flags |= GRPC_WRITE_INTERNAL_COMPRESS;
           }
-          *((grpc_byte_buffer**)stream_op->payload->recv_message.recv_message) =
-              (grpc_byte_buffer*)&stream_state->rs.sbs;
+          *(reinterpret_cast<grpc_byte_buffer**>(
+              stream_op->payload->recv_message.recv_message)) =
+              reinterpret_cast<grpc_byte_buffer*>(&stream_state->rs.sbs);
           GRPC_CLOSURE_SCHED(
               stream_op->payload->recv_message.recv_message_ready,
               GRPC_ERROR_NONE);
@@ -1225,7 +1228,7 @@ static enum e_op_result execute_stream_op(struct op_and_state* oas) {
           GRPC_SLICE_MALLOC((uint32_t)stream_state->rs.length_field);
       uint8_t* dst_p = GRPC_SLICE_START_PTR(read_data_slice);
       memcpy(dst_p, stream_state->rs.read_buffer,
-             (size_t)stream_state->rs.length_field);
+             static_cast<size_t>(stream_state->rs.length_field));
       null_and_maybe_free_read_buffer(s);
       /* Clean up read_slice_buffer in case there is unread data. */
       grpc_slice_buffer_destroy_internal(&stream_state->rs.read_slice_buffer);
@@ -1237,8 +1240,9 @@ static enum e_op_result execute_stream_op(struct op_and_state* oas) {
       if (stream_state->rs.compressed) {
         stream_state->rs.sbs.base.flags = GRPC_WRITE_INTERNAL_COMPRESS;
       }
-      *((grpc_byte_buffer**)stream_op->payload->recv_message.recv_message) =
-          (grpc_byte_buffer*)&stream_state->rs.sbs;
+      *(reinterpret_cast<grpc_byte_buffer**>(
+          stream_op->payload->recv_message.recv_message)) =
+          reinterpret_cast<grpc_byte_buffer*>(&stream_state->rs.sbs);
       GRPC_CLOSURE_SCHED(stream_op->payload->recv_message.recv_message_ready,
                          GRPC_ERROR_NONE);
       stream_state->state_op_done[OP_RECV_MESSAGE] = true;
@@ -1325,7 +1329,7 @@ static enum e_op_result execute_stream_op(struct op_and_state* oas) {
 static int init_stream(grpc_transport* gt, grpc_stream* gs,
                        grpc_stream_refcount* refcount, const void* server_data,
                        gpr_arena* arena) {
-  stream_obj* s = (stream_obj*)gs;
+  stream_obj* s = reinterpret_cast<stream_obj*>(gs);
 
   s->refcount = refcount;
   GRPC_CRONET_STREAM_REF(s, "cronet transport");
@@ -1348,7 +1352,7 @@ static int init_stream(grpc_transport* gt, grpc_stream* gs,
   s->state.pending_read_from_cronet = false;
 
   s->curr_gs = gs;
-  s->curr_ct = (grpc_cronet_transport*)gt;
+  s->curr_ct = reinterpret_cast<grpc_cronet_transport*>(gt);
   s->arena = arena;
 
   gpr_mu_init(&s->mu);
@@ -1381,14 +1385,14 @@ static void perform_stream_op(grpc_transport* gt, grpc_stream* gs,
     GRPC_CLOSURE_SCHED(op->on_complete, GRPC_ERROR_CANCELLED);
     return;
   }
-  stream_obj* s = (stream_obj*)gs;
+  stream_obj* s = reinterpret_cast<stream_obj*>(gs);
   add_to_storage(s, op);
   execute_from_storage(s);
 }
 
 static void destroy_stream(grpc_transport* gt, grpc_stream* gs,
                            grpc_closure* then_schedule_closure) {
-  stream_obj* s = (stream_obj*)gs;
+  stream_obj* s = reinterpret_cast<stream_obj*>(gs);
   null_and_maybe_free_read_buffer(s);
   /* Clean up read_slice_buffer in case there is unread data. */
   grpc_slice_buffer_destroy_internal(&s->state.rs.read_slice_buffer);
@@ -1417,14 +1421,14 @@ static const grpc_transport_vtable grpc_cronet_vtable = {
 grpc_transport* grpc_create_cronet_transport(void* engine, const char* target,
                                              const grpc_channel_args* args,
                                              void* reserved) {
-  grpc_cronet_transport* ct =
-      (grpc_cronet_transport*)gpr_malloc(sizeof(grpc_cronet_transport));
+  grpc_cronet_transport* ct = static_cast<grpc_cronet_transport*>(
+      gpr_malloc(sizeof(grpc_cronet_transport)));
   if (!ct) {
     goto error;
   }
   ct->base.vtable = &grpc_cronet_vtable;
-  ct->engine = (stream_engine*)engine;
-  ct->host = (char*)gpr_malloc(strlen(target) + 1);
+  ct->engine = static_cast<stream_engine*>(engine);
+  ct->host = static_cast<char*>(gpr_malloc(strlen(target) + 1));
   if (!ct->host) {
     goto error;
   }
diff --git a/src/core/ext/transport/inproc/inproc_transport.cc b/src/core/ext/transport/inproc/inproc_transport.cc
index 8dd0b7dce2..2022eaffe5 100644
--- a/src/core/ext/transport/inproc/inproc_transport.cc
+++ b/src/core/ext/transport/inproc/inproc_transport.cc
@@ -208,8 +208,8 @@ static grpc_error* fill_in_metadata(inproc_stream* s,
   grpc_error* error = GRPC_ERROR_NONE;
   for (grpc_linked_mdelem* elem = metadata->list.head;
        (elem != nullptr) && (error == GRPC_ERROR_NONE); elem = elem->next) {
-    grpc_linked_mdelem* nelem =
-        (grpc_linked_mdelem*)gpr_arena_alloc(s->arena, sizeof(*nelem));
+    grpc_linked_mdelem* nelem = static_cast<grpc_linked_mdelem*>(
+        gpr_arena_alloc(s->arena, sizeof(*nelem)));
     nelem->md =
         grpc_mdelem_from_slices(grpc_slice_intern(GRPC_MDKEY(elem->md)),
                                 grpc_slice_intern(GRPC_MDVALUE(elem->md)));
@@ -223,8 +223,8 @@ static int init_stream(grpc_transport* gt, grpc_stream* gs,
                        grpc_stream_refcount* refcount, const void* server_data,
                        gpr_arena* arena) {
   INPROC_LOG(GPR_DEBUG, "init_stream %p %p %p", gt, gs, server_data);
-  inproc_transport* t = (inproc_transport*)gt;
-  inproc_stream* s = (inproc_stream*)gs;
+  inproc_transport* t = reinterpret_cast<inproc_transport*>(gt);
+  inproc_stream* s = reinterpret_cast<inproc_stream*>(gs);
   s->arena = arena;
 
   s->refs = refcount;
@@ -368,11 +368,11 @@ static void close_other_side_locked(inproc_stream* s, const char* reason) {
 static void complete_if_batch_end_locked(inproc_stream* s, grpc_error* error,
                                          grpc_transport_stream_op_batch* op,
                                          const char* msg) {
-  int is_sm = (int)(op == s->send_message_op);
-  int is_stm = (int)(op == s->send_trailing_md_op);
-  int is_rim = (int)(op == s->recv_initial_md_op);
-  int is_rm = (int)(op == s->recv_message_op);
-  int is_rtm = (int)(op == s->recv_trailing_md_op);
+  int is_sm = static_cast<int>(op == s->send_message_op);
+  int is_stm = static_cast<int>(op == s->send_trailing_md_op);
+  int is_rim = static_cast<int>(op == s->recv_initial_md_op);
+  int is_rm = static_cast<int>(op == s->recv_message_op);
+  int is_rtm = static_cast<int>(op == s->recv_trailing_md_op);
 
   if ((is_sm + is_stm + is_rim + is_rm + is_rtm) == 1) {
     INPROC_LOG(GPR_DEBUG, "%s %p %p %p", msg, s, op, error);
@@ -425,13 +425,13 @@ static void fail_helper_locked(inproc_stream* s, grpc_error* error) {
       // since it expects that as well as no error yet
       grpc_metadata_batch fake_md;
       grpc_metadata_batch_init(&fake_md);
-      grpc_linked_mdelem* path_md =
-          (grpc_linked_mdelem*)gpr_arena_alloc(s->arena, sizeof(*path_md));
+      grpc_linked_mdelem* path_md = static_cast<grpc_linked_mdelem*>(
+          gpr_arena_alloc(s->arena, sizeof(*path_md)));
       path_md->md = grpc_mdelem_from_slices(g_fake_path_key, g_fake_path_value);
       GPR_ASSERT(grpc_metadata_batch_link_tail(&fake_md, path_md) ==
                  GRPC_ERROR_NONE);
-      grpc_linked_mdelem* auth_md =
-          (grpc_linked_mdelem*)gpr_arena_alloc(s->arena, sizeof(*auth_md));
+      grpc_linked_mdelem* auth_md = static_cast<grpc_linked_mdelem*>(
+          gpr_arena_alloc(s->arena, sizeof(*auth_md)));
       auth_md->md = grpc_mdelem_from_slices(g_fake_auth_key, g_fake_auth_value);
       GPR_ASSERT(grpc_metadata_batch_link_tail(&fake_md, auth_md) ==
                  GRPC_ERROR_NONE);
@@ -566,7 +566,7 @@ static void op_state_machine(void* arg, grpc_error* error) {
   bool needs_close = false;
 
   INPROC_LOG(GPR_DEBUG, "op_state_machine %p", arg);
-  inproc_stream* s = (inproc_stream*)arg;
+  inproc_stream* s = static_cast<inproc_stream*>(arg);
   gpr_mu* mu = &s->t->mu->mu;  // keep aside in case s gets closed
   gpr_mu_lock(mu);
   s->op_closure_scheduled = false;
@@ -863,7 +863,7 @@ static bool cancel_stream_locked(inproc_stream* s, grpc_error* error) {
 static void perform_stream_op(grpc_transport* gt, grpc_stream* gs,
                               grpc_transport_stream_op_batch* op) {
   INPROC_LOG(GPR_DEBUG, "perform_stream_op %p %p %p", gt, gs, op);
-  inproc_stream* s = (inproc_stream*)gs;
+  inproc_stream* s = reinterpret_cast<inproc_stream*>(gs);
   gpr_mu* mu = &s->t->mu->mu;  // save aside in case s gets closed
   gpr_mu_lock(mu);
 
@@ -1047,7 +1047,7 @@ static void close_transport_locked(inproc_transport* t) {
 }
 
 static void perform_transport_op(grpc_transport* gt, grpc_transport_op* op) {
-  inproc_transport* t = (inproc_transport*)gt;
+  inproc_transport* t = reinterpret_cast<inproc_transport*>(gt);
   INPROC_LOG(GPR_DEBUG, "perform_transport_op %p %p", t, op);
   gpr_mu_lock(&t->mu->mu);
   if (op->on_connectivity_state_change) {
@@ -1082,13 +1082,13 @@ static void perform_transport_op(grpc_transport* gt, grpc_transport_op* op) {
 static void destroy_stream(grpc_transport* gt, grpc_stream* gs,
                            grpc_closure* then_schedule_closure) {
   INPROC_LOG(GPR_DEBUG, "destroy_stream %p %p", gs, then_schedule_closure);
-  inproc_stream* s = (inproc_stream*)gs;
+  inproc_stream* s = reinterpret_cast<inproc_stream*>(gs);
   s->closure_at_destroy = then_schedule_closure;
   really_destroy_stream(s);
 }
 
 static void destroy_transport(grpc_transport* gt) {
-  inproc_transport* t = (inproc_transport*)gt;
+  inproc_transport* t = reinterpret_cast<inproc_transport*>(gt);
   INPROC_LOG(GPR_DEBUG, "destroy_transport %p", t);
   gpr_mu_lock(&t->mu->mu);
   close_transport_locked(t);
@@ -1151,10 +1151,12 @@ static void inproc_transports_create(grpc_transport** server_transport,
                                      grpc_transport** client_transport,
                                      const grpc_channel_args* client_args) {
   INPROC_LOG(GPR_DEBUG, "inproc_transports_create");
-  inproc_transport* st = (inproc_transport*)gpr_zalloc(sizeof(*st));
-  inproc_transport* ct = (inproc_transport*)gpr_zalloc(sizeof(*ct));
+  inproc_transport* st =
+      static_cast<inproc_transport*>(gpr_zalloc(sizeof(*st)));
+  inproc_transport* ct =
+      static_cast<inproc_transport*>(gpr_zalloc(sizeof(*ct)));
   // Share one lock between both sides since both sides get affected
-  st->mu = ct->mu = (shared_mu*)gpr_malloc(sizeof(*st->mu));
+  st->mu = ct->mu = static_cast<shared_mu*>(gpr_malloc(sizeof(*st->mu)));
   gpr_mu_init(&st->mu->mu);
   gpr_ref_init(&st->mu->refs, 2);
   st->base.vtable = &inproc_vtable;
@@ -1173,8 +1175,8 @@ static void inproc_transports_create(grpc_transport** server_transport,
   ct->other_side = st;
   st->stream_list = nullptr;
   ct->stream_list = nullptr;
-  *server_transport = (grpc_transport*)st;
-  *client_transport = (grpc_transport*)ct;
+  *server_transport = reinterpret_cast<grpc_transport*>(st);
+  *client_transport = reinterpret_cast<grpc_transport*>(ct);
 }
 
 grpc_channel* grpc_inproc_channel_create(grpc_server* server,
diff --git a/src/core/lib/avl/avl.cc b/src/core/lib/avl/avl.cc
index acc0432af7..c674d9be28 100644
--- a/src/core/lib/avl/avl.cc
+++ b/src/core/lib/avl/avl.cc
@@ -79,7 +79,7 @@ static grpc_avl_node* assert_invariants(grpc_avl_node* n) { return n; }
 
 grpc_avl_node* new_node(void* key, void* value, grpc_avl_node* left,
                         grpc_avl_node* right) {
-  grpc_avl_node* node = (grpc_avl_node*)gpr_malloc(sizeof(*node));
+  grpc_avl_node* node = static_cast<grpc_avl_node*>(gpr_malloc(sizeof(*node)));
   gpr_ref_init(&node->refs, 1);
   node->key = key;
   node->value = value;
diff --git a/src/core/lib/backoff/backoff.cc b/src/core/lib/backoff/backoff.cc
index 9275fc2894..4b74afc244 100644
--- a/src/core/lib/backoff/backoff.cc
+++ b/src/core/lib/backoff/backoff.cc
@@ -55,13 +55,14 @@ grpc_millis BackOff::NextAttemptTime() {
     initial_ = false;
     return current_backoff_ + grpc_core::ExecCtx::Get()->Now();
   }
-  current_backoff_ =
-      (grpc_millis)(std::min(current_backoff_ * options_.multiplier(),
-                             (double)options_.max_backoff()));
+  current_backoff_ = static_cast<grpc_millis>(
+      std::min(current_backoff_ * options_.multiplier(),
+               static_cast<double>(options_.max_backoff())));
   const double jitter = generate_uniform_random_number_between(
       &rng_state_, -options_.jitter() * current_backoff_,
       options_.jitter() * current_backoff_);
-  const grpc_millis next_timeout = (grpc_millis)(current_backoff_ + jitter);
+  const grpc_millis next_timeout =
+      static_cast<grpc_millis>(current_backoff_ + jitter);
   return next_timeout + grpc_core::ExecCtx::Get()->Now();
 }
 
diff --git a/src/core/lib/channel/channel_args.cc b/src/core/lib/channel/channel_args.cc
index 5cd158aff2..98fdfa6b9a 100644
--- a/src/core/lib/channel/channel_args.cc
+++ b/src/core/lib/channel/channel_args.cc
@@ -87,13 +87,14 @@ grpc_channel_args* grpc_channel_args_copy_and_add_and_remove(
   }
   // Create result.
   grpc_channel_args* dst =
-      (grpc_channel_args*)gpr_malloc(sizeof(grpc_channel_args));
+      static_cast<grpc_channel_args*>(gpr_malloc(sizeof(grpc_channel_args)));
   dst->num_args = num_args_to_copy + num_to_add;
   if (dst->num_args == 0) {
     dst->args = nullptr;
     return dst;
   }
-  dst->args = (grpc_arg*)gpr_malloc(sizeof(grpc_arg) * dst->num_args);
+  dst->args =
+      static_cast<grpc_arg*>(gpr_malloc(sizeof(grpc_arg) * dst->num_args));
   // Copy args from src that are not being removed.
   size_t dst_idx = 0;
   if (src != nullptr) {
@@ -118,7 +119,8 @@ grpc_channel_args* grpc_channel_args_copy(const grpc_channel_args* src) {
 grpc_channel_args* grpc_channel_args_union(const grpc_channel_args* a,
                                            const grpc_channel_args* b) {
   const size_t max_out = (a->num_args + b->num_args);
-  grpc_arg* uniques = (grpc_arg*)gpr_malloc(sizeof(*uniques) * max_out);
+  grpc_arg* uniques =
+      static_cast<grpc_arg*>(gpr_malloc(sizeof(*uniques) * max_out));
   for (size_t i = 0; i < a->num_args; ++i) uniques[i] = a->args[i];
 
   size_t uniques_idx = a->num_args;
@@ -161,15 +163,16 @@ static int cmp_arg(const grpc_arg* a, const grpc_arg* b) {
 /* stabilizing comparison function: since channel_args ordering matters for
  * keys with the same name, we need to preserve that ordering */
 static int cmp_key_stable(const void* ap, const void* bp) {
-  const grpc_arg* const* a = (const grpc_arg* const*)ap;
-  const grpc_arg* const* b = (const grpc_arg* const*)bp;
+  const grpc_arg* const* a = static_cast<const grpc_arg* const*>(ap);
+  const grpc_arg* const* b = static_cast<const grpc_arg* const*>(bp);
   int c = strcmp((*a)->key, (*b)->key);
   if (c == 0) c = GPR_ICMP(*a, *b);
   return c;
 }
 
 grpc_channel_args* grpc_channel_args_normalize(const grpc_channel_args* a) {
-  grpc_arg** args = (grpc_arg**)gpr_malloc(sizeof(grpc_arg*) * a->num_args);
+  grpc_arg** args =
+      static_cast<grpc_arg**>(gpr_malloc(sizeof(grpc_arg*) * a->num_args));
   for (size_t i = 0; i < a->num_args; i++) {
     args[i] = &a->args[i];
   }
@@ -177,9 +180,9 @@ grpc_channel_args* grpc_channel_args_normalize(const grpc_channel_args* a) {
     qsort(args, a->num_args, sizeof(grpc_arg*), cmp_key_stable);
 
   grpc_channel_args* b =
-      (grpc_channel_args*)gpr_malloc(sizeof(grpc_channel_args));
+      static_cast<grpc_channel_args*>(gpr_malloc(sizeof(grpc_channel_args)));
   b->num_args = a->num_args;
-  b->args = (grpc_arg*)gpr_malloc(sizeof(grpc_arg) * b->num_args);
+  b->args = static_cast<grpc_arg*>(gpr_malloc(sizeof(grpc_arg) * b->num_args));
   for (size_t i = 0; i < a->num_args; i++) {
     b->args[i] = copy_arg(args[i]);
   }
@@ -215,7 +218,7 @@ grpc_compression_algorithm grpc_channel_args_get_compression_algorithm(
   for (i = 0; i < a->num_args; ++i) {
     if (a->args[i].type == GRPC_ARG_INTEGER &&
         !strcmp(GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM, a->args[i].key)) {
-      return (grpc_compression_algorithm)a->args[i].value.integer;
+      return static_cast<grpc_compression_algorithm>(a->args[i].value.integer);
       break;
     }
   }
@@ -296,7 +299,7 @@ uint32_t grpc_channel_args_compression_algorithm_get_states(
     const grpc_channel_args* a) {
   int* states_arg;
   if (find_compression_algorithm_states_bitset(a, &states_arg)) {
-    return (uint32_t)*states_arg;
+    return static_cast<uint32_t>(*states_arg);
   } else {
     return (1u << GRPC_COMPRESS_ALGORITHMS_COUNT) - 1; /* All algs. enabled */
   }
diff --git a/src/core/lib/channel/channel_stack.cc b/src/core/lib/channel/channel_stack.cc
index 195fe0b195..737d828e4b 100644
--- a/src/core/lib/channel/channel_stack.cc
+++ b/src/core/lib/channel/channel_stack.cc
@@ -104,8 +104,9 @@ grpc_error* grpc_channel_stack_init(
   GRPC_STREAM_REF_INIT(&stack->refcount, initial_refs, destroy, destroy_arg,
                        name);
   elems = CHANNEL_ELEMS_FROM_STACK(stack);
-  user_data = ((char*)elems) + ROUND_UP_TO_ALIGNMENT_SIZE(
-                                   filter_count * sizeof(grpc_channel_element));
+  user_data =
+      (reinterpret_cast<char*>(elems)) +
+      ROUND_UP_TO_ALIGNMENT_SIZE(filter_count * sizeof(grpc_channel_element));
 
   /* init per-filter data */
   grpc_error* first_error = GRPC_ERROR_NONE;
@@ -162,7 +163,7 @@ grpc_error* grpc_call_stack_init(grpc_channel_stack* channel_stack,
   GRPC_STREAM_REF_INIT(&elem_args->call_stack->refcount, initial_refs, destroy,
                        destroy_arg, "CALL_STACK");
   call_elems = CALL_ELEMS_FROM_STACK(elem_args->call_stack);
-  user_data = ((char*)call_elems) +
+  user_data = (reinterpret_cast<char*>(call_elems)) +
               ROUND_UP_TO_ALIGNMENT_SIZE(count * sizeof(grpc_call_element));
 
   /* init per-filter data */
@@ -194,7 +195,7 @@ void grpc_call_stack_set_pollset_or_pollset_set(grpc_call_stack* call_stack,
   size_t i;
 
   call_elems = CALL_ELEMS_FROM_STACK(call_stack);
-  user_data = ((char*)call_elems) +
+  user_data = (reinterpret_cast<char*>(call_elems)) +
               ROUND_UP_TO_ALIGNMENT_SIZE(count * sizeof(grpc_call_element));
 
   /* init per-filter data */
@@ -243,11 +244,13 @@ void grpc_channel_next_op(grpc_channel_element* elem, grpc_transport_op* op) {
 
 grpc_channel_stack* grpc_channel_stack_from_top_element(
     grpc_channel_element* elem) {
-  return (grpc_channel_stack*)((char*)(elem)-ROUND_UP_TO_ALIGNMENT_SIZE(
-      sizeof(grpc_channel_stack)));
+  return reinterpret_cast<grpc_channel_stack*>(
+      reinterpret_cast<char*>(elem) -
+      ROUND_UP_TO_ALIGNMENT_SIZE(sizeof(grpc_channel_stack)));
 }
 
 grpc_call_stack* grpc_call_stack_from_top_element(grpc_call_element* elem) {
-  return (grpc_call_stack*)((char*)(elem)-ROUND_UP_TO_ALIGNMENT_SIZE(
-      sizeof(grpc_call_stack)));
+  return reinterpret_cast<grpc_call_stack*>(
+      reinterpret_cast<char*>(elem) -
+      ROUND_UP_TO_ALIGNMENT_SIZE(sizeof(grpc_call_stack)));
 }
diff --git a/src/core/lib/channel/channel_stack_builder.cc b/src/core/lib/channel/channel_stack_builder.cc
index fcba826644..cae862ec0e 100644
--- a/src/core/lib/channel/channel_stack_builder.cc
+++ b/src/core/lib/channel/channel_stack_builder.cc
@@ -52,7 +52,7 @@ struct grpc_channel_stack_builder_iterator {
 
 grpc_channel_stack_builder* grpc_channel_stack_builder_create(void) {
   grpc_channel_stack_builder* b =
-      (grpc_channel_stack_builder*)gpr_zalloc(sizeof(*b));
+      static_cast<grpc_channel_stack_builder*>(gpr_zalloc(sizeof(*b)));
 
   b->begin.filter = nullptr;
   b->end.filter = nullptr;
@@ -78,7 +78,8 @@ const char* grpc_channel_stack_builder_get_target(
 static grpc_channel_stack_builder_iterator* create_iterator_at_filter_node(
     grpc_channel_stack_builder* builder, filter_node* node) {
   grpc_channel_stack_builder_iterator* it =
-      (grpc_channel_stack_builder_iterator*)gpr_malloc(sizeof(*it));
+      static_cast<grpc_channel_stack_builder_iterator*>(
+          gpr_malloc(sizeof(*it)));
   it->builder = builder;
   it->node = node;
   return it;
@@ -213,7 +214,8 @@ bool grpc_channel_stack_builder_prepend_filter(
 static void add_after(filter_node* before, const grpc_channel_filter* filter,
                       grpc_post_filter_create_init_func post_init_func,
                       void* user_data) {
-  filter_node* new_node = (filter_node*)gpr_malloc(sizeof(*new_node));
+  filter_node* new_node =
+      static_cast<filter_node*>(gpr_malloc(sizeof(*new_node)));
   new_node->next = before->next;
   new_node->prev = before;
   new_node->next->prev = new_node->prev->next = new_node;
@@ -265,7 +267,8 @@ grpc_error* grpc_channel_stack_builder_finish(
 
   // create an array of filters
   const grpc_channel_filter** filters =
-      (const grpc_channel_filter**)gpr_malloc(sizeof(*filters) * num_filters);
+      static_cast<const grpc_channel_filter**>(
+          gpr_malloc(sizeof(*filters) * num_filters));
   size_t i = 0;
   for (filter_node* p = builder->begin.next; p != &builder->end; p = p->next) {
     filters[i++] = p->filter;
@@ -277,8 +280,8 @@ grpc_error* grpc_channel_stack_builder_finish(
   // allocate memory, with prefix_bytes followed by channel_stack_size
   *result = gpr_zalloc(prefix_bytes + channel_stack_size);
   // fetch a pointer to the channel stack
-  grpc_channel_stack* channel_stack =
-      (grpc_channel_stack*)((char*)(*result) + prefix_bytes);
+  grpc_channel_stack* channel_stack = reinterpret_cast<grpc_channel_stack*>(
+      static_cast<char*>(*result) + prefix_bytes);
   // and initialize it
   grpc_error* error = grpc_channel_stack_init(
       initial_refs, destroy, destroy_arg == nullptr ? *result : destroy_arg,
@@ -303,7 +306,7 @@ grpc_error* grpc_channel_stack_builder_finish(
   }
 
   grpc_channel_stack_builder_destroy(builder);
-  gpr_free((grpc_channel_filter**)filters);
+  gpr_free(const_cast<grpc_channel_filter**>(filters));
 
   return error;
 }
diff --git a/src/core/lib/channel/connected_channel.cc b/src/core/lib/channel/connected_channel.cc
index fb26bdf586..a16e89ce00 100644
--- a/src/core/lib/channel/connected_channel.cc
+++ b/src/core/lib/channel/connected_channel.cc
@@ -52,7 +52,7 @@ typedef struct connected_channel_call_data {
 } call_data;
 
 static void run_in_call_combiner(void* arg, grpc_error* error) {
-  callback_state* state = (callback_state*)arg;
+  callback_state* state = static_cast<callback_state*>(arg);
   GRPC_CALL_COMBINER_START(state->call_combiner, state->original_closure,
                            GRPC_ERROR_REF(error), state->reason);
 }
@@ -96,8 +96,8 @@ static callback_state* get_state_for_batch(
    into transport stream operations */
 static void con_start_transport_stream_op_batch(
     grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
-  call_data* calld = (call_data*)elem->call_data;
-  channel_data* chand = (channel_data*)elem->channel_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   if (batch->recv_initial_metadata) {
     callback_state* state = &calld->recv_initial_metadata_ready;
     intercept_callback(
@@ -115,7 +115,8 @@ static void con_start_transport_stream_op_batch(
     // calld->on_complete like we can for the other ops.  However,
     // cancellation isn't in the fast path, so we just allocate a new
     // closure for each one.
-    callback_state* state = (callback_state*)gpr_malloc(sizeof(*state));
+    callback_state* state =
+        static_cast<callback_state*>(gpr_malloc(sizeof(*state)));
     intercept_callback(calld, state, true, "on_complete (cancel_stream)",
                        &batch->on_complete);
   } else {
@@ -129,15 +130,15 @@ static void con_start_transport_stream_op_batch(
 
 static void con_start_transport_op(grpc_channel_element* elem,
                                    grpc_transport_op* op) {
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   grpc_transport_perform_op(chand->transport, op);
 }
 
 /* Constructor for call_data */
 static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
-  call_data* calld = (call_data*)elem->call_data;
-  channel_data* chand = (channel_data*)elem->channel_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   calld->call_combiner = args->call_combiner;
   int r = grpc_transport_init_stream(
       chand->transport, TRANSPORT_STREAM_FROM_CALL_DATA(calld),
@@ -149,8 +150,8 @@ static grpc_error* init_call_elem(grpc_call_element* elem,
 
 static void set_pollset_or_pollset_set(grpc_call_element* elem,
                                        grpc_polling_entity* pollent) {
-  call_data* calld = (call_data*)elem->call_data;
-  channel_data* chand = (channel_data*)elem->channel_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   grpc_transport_set_pops(chand->transport,
                           TRANSPORT_STREAM_FROM_CALL_DATA(calld), pollent);
 }
@@ -159,8 +160,8 @@ static void set_pollset_or_pollset_set(grpc_call_element* elem,
 static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* then_schedule_closure) {
-  call_data* calld = (call_data*)elem->call_data;
-  channel_data* chand = (channel_data*)elem->channel_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   grpc_transport_destroy_stream(chand->transport,
                                 TRANSPORT_STREAM_FROM_CALL_DATA(calld),
                                 then_schedule_closure);
@@ -169,7 +170,7 @@ static void destroy_call_elem(grpc_call_element* elem,
 /* Constructor for channel_data */
 static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
-  channel_data* cd = (channel_data*)elem->channel_data;
+  channel_data* cd = static_cast<channel_data*>(elem->channel_data);
   GPR_ASSERT(args->is_last);
   cd->transport = nullptr;
   return GRPC_ERROR_NONE;
@@ -177,7 +178,7 @@ static grpc_error* init_channel_elem(grpc_channel_element* elem,
 
 /* Destructor for channel_data */
 static void destroy_channel_elem(grpc_channel_element* elem) {
-  channel_data* cd = (channel_data*)elem->channel_data;
+  channel_data* cd = static_cast<channel_data*>(elem->channel_data);
   if (cd->transport) {
     grpc_transport_destroy(cd->transport);
   }
@@ -203,10 +204,10 @@ const grpc_channel_filter grpc_connected_filter = {
 
 static void bind_transport(grpc_channel_stack* channel_stack,
                            grpc_channel_element* elem, void* t) {
-  channel_data* cd = (channel_data*)elem->channel_data;
+  channel_data* cd = static_cast<channel_data*>(elem->channel_data);
   GPR_ASSERT(elem->filter == &grpc_connected_filter);
   GPR_ASSERT(cd->transport == nullptr);
-  cd->transport = (grpc_transport*)t;
+  cd->transport = static_cast<grpc_transport*>(t);
 
   /* HACK(ctiller): increase call stack size for the channel to make space
      for channel data. We need a cleaner (but performant) way to do this,
@@ -215,7 +216,7 @@ static void bind_transport(grpc_channel_stack* channel_stack,
      the last call element, and the last call element MUST be the connected
      channel. */
   channel_stack->call_stack_size +=
-      grpc_transport_stream_size((grpc_transport*)t);
+      grpc_transport_stream_size(static_cast<grpc_transport*>(t));
 }
 
 bool grpc_add_connected_filter(grpc_channel_stack_builder* builder,
@@ -228,6 +229,6 @@ bool grpc_add_connected_filter(grpc_channel_stack_builder* builder,
 }
 
 grpc_stream* grpc_connected_channel_get_stream(grpc_call_element* elem) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   return TRANSPORT_STREAM_FROM_CALL_DATA(calld);
 }
diff --git a/src/core/lib/channel/handshaker.cc b/src/core/lib/channel/handshaker.cc
index dcb149c03e..518e880c15 100644
--- a/src/core/lib/channel/handshaker.cc
+++ b/src/core/lib/channel/handshaker.cc
@@ -81,8 +81,8 @@ struct grpc_handshake_manager {
 };
 
 grpc_handshake_manager* grpc_handshake_manager_create() {
-  grpc_handshake_manager* mgr =
-      (grpc_handshake_manager*)gpr_zalloc(sizeof(grpc_handshake_manager));
+  grpc_handshake_manager* mgr = static_cast<grpc_handshake_manager*>(
+      gpr_zalloc(sizeof(grpc_handshake_manager)));
   gpr_mu_init(&mgr->mu);
   gpr_ref_init(&mgr->refs, 1);
   return mgr;
@@ -135,8 +135,8 @@ void grpc_handshake_manager_add(grpc_handshake_manager* mgr,
     realloc_count = mgr->count * 2;
   }
   if (realloc_count > 0) {
-    mgr->handshakers = (grpc_handshaker**)gpr_realloc(
-        mgr->handshakers, realloc_count * sizeof(grpc_handshaker*));
+    mgr->handshakers = static_cast<grpc_handshaker**>(gpr_realloc(
+        mgr->handshakers, realloc_count * sizeof(grpc_handshaker*)));
   }
   mgr->handshakers[mgr->count++] = handshaker;
   gpr_mu_unlock(&mgr->mu);
@@ -197,7 +197,7 @@ static bool call_next_handshaker_locked(grpc_handshake_manager* mgr,
 // A function used as the handshaker-done callback when chaining
 // handshakers together.
 static void call_next_handshaker(void* arg, grpc_error* error) {
-  grpc_handshake_manager* mgr = (grpc_handshake_manager*)arg;
+  grpc_handshake_manager* mgr = static_cast<grpc_handshake_manager*>(arg);
   gpr_mu_lock(&mgr->mu);
   bool done = call_next_handshaker_locked(mgr, GRPC_ERROR_REF(error));
   gpr_mu_unlock(&mgr->mu);
@@ -211,7 +211,7 @@ static void call_next_handshaker(void* arg, grpc_error* error) {
 
 // Callback invoked when deadline is exceeded.
 static void on_timeout(void* arg, grpc_error* error) {
-  grpc_handshake_manager* mgr = (grpc_handshake_manager*)arg;
+  grpc_handshake_manager* mgr = static_cast<grpc_handshake_manager*>(arg);
   if (error == GRPC_ERROR_NONE) {  // Timer fired, rather than being cancelled.
     grpc_handshake_manager_shutdown(
         mgr, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Handshake timed out"));
@@ -233,8 +233,8 @@ void grpc_handshake_manager_do_handshake(
   mgr->args.endpoint = endpoint;
   mgr->args.args = grpc_channel_args_copy(channel_args);
   mgr->args.user_data = user_data;
-  mgr->args.read_buffer =
-      (grpc_slice_buffer*)gpr_malloc(sizeof(*mgr->args.read_buffer));
+  mgr->args.read_buffer = static_cast<grpc_slice_buffer*>(
+      gpr_malloc(sizeof(*mgr->args.read_buffer)));
   grpc_slice_buffer_init(mgr->args.read_buffer);
   // Initialize state needed for calling handshakers.
   mgr->acceptor = acceptor;
diff --git a/src/core/lib/channel/handshaker_registry.cc b/src/core/lib/channel/handshaker_registry.cc
index 098eabf084..5464cc42f4 100644
--- a/src/core/lib/channel/handshaker_registry.cc
+++ b/src/core/lib/channel/handshaker_registry.cc
@@ -34,8 +34,9 @@ typedef struct {
 static void grpc_handshaker_factory_list_register(
     grpc_handshaker_factory_list* list, bool at_start,
     grpc_handshaker_factory* factory) {
-  list->list = (grpc_handshaker_factory**)gpr_realloc(
-      list->list, (list->num_factories + 1) * sizeof(grpc_handshaker_factory*));
+  list->list = static_cast<grpc_handshaker_factory**>(gpr_realloc(
+      list->list,
+      (list->num_factories + 1) * sizeof(grpc_handshaker_factory*)));
   if (at_start) {
     memmove(list->list + 1, list->list,
             sizeof(grpc_handshaker_factory*) * list->num_factories);
diff --git a/src/core/lib/compression/compression_internal.cc b/src/core/lib/compression/compression_internal.cc
index 4bbaca2f98..36829c8adf 100644
--- a/src/core/lib/compression/compression_internal.cc
+++ b/src/core/lib/compression/compression_internal.cc
@@ -190,7 +190,8 @@ grpc_message_compression_algorithm grpc_message_compression_algorithm_for_level(
   GRPC_API_TRACE("grpc_message_compression_algorithm_for_level(level=%d)", 1,
                  ((int)level));
   if (level > GRPC_COMPRESS_LEVEL_HIGH) {
-    gpr_log(GPR_ERROR, "Unknown message compression level %d.", (int)level);
+    gpr_log(GPR_ERROR, "Unknown message compression level %d.",
+            static_cast<int>(level));
     abort();
   }
 
diff --git a/src/core/lib/compression/message_compress.cc b/src/core/lib/compression/message_compress.cc
index 1e9b0f10ee..2e44551935 100644
--- a/src/core/lib/compression/message_compress.cc
+++ b/src/core/lib/compression/message_compress.cc
@@ -36,23 +36,23 @@ static int zlib_body(z_stream* zs, grpc_slice_buffer* input,
   int flush;
   size_t i;
   grpc_slice outbuf = GRPC_SLICE_MALLOC(OUTPUT_BLOCK_SIZE);
-  const uInt uint_max = ~(uInt)0;
+  const uInt uint_max = ~static_cast<uInt>(0);
 
   GPR_ASSERT(GRPC_SLICE_LENGTH(outbuf) <= uint_max);
-  zs->avail_out = (uInt)GRPC_SLICE_LENGTH(outbuf);
+  zs->avail_out = static_cast<uInt> GRPC_SLICE_LENGTH(outbuf);
   zs->next_out = GRPC_SLICE_START_PTR(outbuf);
   flush = Z_NO_FLUSH;
   for (i = 0; i < input->count; i++) {
     if (i == input->count - 1) flush = Z_FINISH;
     GPR_ASSERT(GRPC_SLICE_LENGTH(input->slices[i]) <= uint_max);
-    zs->avail_in = (uInt)GRPC_SLICE_LENGTH(input->slices[i]);
+    zs->avail_in = static_cast<uInt> GRPC_SLICE_LENGTH(input->slices[i]);
     zs->next_in = GRPC_SLICE_START_PTR(input->slices[i]);
     do {
       if (zs->avail_out == 0) {
         grpc_slice_buffer_add_indexed(output, outbuf);
         outbuf = GRPC_SLICE_MALLOC(OUTPUT_BLOCK_SIZE);
         GPR_ASSERT(GRPC_SLICE_LENGTH(outbuf) <= uint_max);
-        zs->avail_out = (uInt)GRPC_SLICE_LENGTH(outbuf);
+        zs->avail_out = static_cast<uInt> GRPC_SLICE_LENGTH(outbuf);
         zs->next_out = GRPC_SLICE_START_PTR(outbuf);
       }
       r = flate(zs, flush);
diff --git a/src/core/lib/compression/stream_compression_gzip.cc b/src/core/lib/compression/stream_compression_gzip.cc
index 897f3918a7..48fe99b69f 100644
--- a/src/core/lib/compression/stream_compression_gzip.cc
+++ b/src/core/lib/compression/stream_compression_gzip.cc
@@ -48,11 +48,11 @@ static bool gzip_flate(grpc_stream_compression_context_gzip* ctx,
     size_t slice_size = max_output_size < OUTPUT_BLOCK_SIZE ? max_output_size
                                                             : OUTPUT_BLOCK_SIZE;
     grpc_slice slice_out = GRPC_SLICE_MALLOC(slice_size);
-    ctx->zs.avail_out = (uInt)slice_size;
+    ctx->zs.avail_out = static_cast<uInt>(slice_size);
     ctx->zs.next_out = GRPC_SLICE_START_PTR(slice_out);
     while (ctx->zs.avail_out > 0 && in->length > 0 && !eoc) {
       grpc_slice slice = grpc_slice_buffer_take_first(in);
-      ctx->zs.avail_in = (uInt)GRPC_SLICE_LENGTH(slice);
+      ctx->zs.avail_in = static_cast<uInt> GRPC_SLICE_LENGTH(slice);
       ctx->zs.next_in = GRPC_SLICE_START_PTR(slice);
       r = ctx->flate(&ctx->zs, Z_NO_FLUSH);
       if (r < 0 && r != Z_BUF_ERROR) {
@@ -142,7 +142,7 @@ static bool grpc_stream_compress_gzip(grpc_stream_compression_context* ctx,
     return false;
   }
   grpc_stream_compression_context_gzip* gzip_ctx =
-      (grpc_stream_compression_context_gzip*)ctx;
+      reinterpret_cast<grpc_stream_compression_context_gzip*>(ctx);
   GPR_ASSERT(gzip_ctx->flate == deflate);
   int gzip_flush;
   switch (flush) {
@@ -172,7 +172,7 @@ static bool grpc_stream_decompress_gzip(grpc_stream_compression_context* ctx,
     return false;
   }
   grpc_stream_compression_context_gzip* gzip_ctx =
-      (grpc_stream_compression_context_gzip*)ctx;
+      reinterpret_cast<grpc_stream_compression_context_gzip*>(ctx);
   GPR_ASSERT(gzip_ctx->flate == inflate);
   return gzip_flate(gzip_ctx, in, out, output_size, max_output_size,
                     Z_SYNC_FLUSH, end_of_context);
@@ -184,8 +184,8 @@ grpc_stream_compression_context_create_gzip(
   GPR_ASSERT(method == GRPC_STREAM_COMPRESSION_GZIP_COMPRESS ||
              method == GRPC_STREAM_COMPRESSION_GZIP_DECOMPRESS);
   grpc_stream_compression_context_gzip* gzip_ctx =
-      (grpc_stream_compression_context_gzip*)gpr_zalloc(
-          sizeof(grpc_stream_compression_context_gzip));
+      static_cast<grpc_stream_compression_context_gzip*>(
+          gpr_zalloc(sizeof(grpc_stream_compression_context_gzip)));
   int r;
   if (gzip_ctx == nullptr) {
     return nullptr;
@@ -204,7 +204,7 @@ grpc_stream_compression_context_create_gzip(
   }
 
   gzip_ctx->base.vtable = &grpc_stream_compression_gzip_vtable;
-  return (grpc_stream_compression_context*)gzip_ctx;
+  return reinterpret_cast<grpc_stream_compression_context*>(gzip_ctx);
 }
 
 static void grpc_stream_compression_context_destroy_gzip(
@@ -213,7 +213,7 @@ static void grpc_stream_compression_context_destroy_gzip(
     return;
   }
   grpc_stream_compression_context_gzip* gzip_ctx =
-      (grpc_stream_compression_context_gzip*)ctx;
+      reinterpret_cast<grpc_stream_compression_context_gzip*>(ctx);
   if (gzip_ctx->flate == inflate) {
     inflateEnd(&gzip_ctx->zs);
   } else {
diff --git a/src/core/lib/compression/stream_compression_identity.cc b/src/core/lib/compression/stream_compression_identity.cc
index af4051144c..933d24b3a1 100644
--- a/src/core/lib/compression/stream_compression_identity.cc
+++ b/src/core/lib/compression/stream_compression_identity.cc
@@ -79,7 +79,7 @@ grpc_stream_compression_context_create_identity(
   GPR_ASSERT(method == GRPC_STREAM_COMPRESSION_IDENTITY_COMPRESS ||
              method == GRPC_STREAM_COMPRESSION_IDENTITY_DECOMPRESS);
   /* No context needed in this case. Use fake context instead. */
-  return (grpc_stream_compression_context*)&identity_ctx;
+  return &identity_ctx;
 }
 
 static void grpc_stream_compression_context_destroy_identity(
diff --git a/src/core/lib/debug/stats.cc b/src/core/lib/debug/stats.cc
index 40355c2d45..09a86287e4 100644
--- a/src/core/lib/debug/stats.cc
+++ b/src/core/lib/debug/stats.cc
@@ -32,8 +32,8 @@ static size_t g_num_cores;
 
 void grpc_stats_init(void) {
   g_num_cores = GPR_MAX(1, gpr_cpu_num_cores());
-  grpc_stats_per_cpu_storage =
-      (grpc_stats_data*)gpr_zalloc(sizeof(grpc_stats_data) * g_num_cores);
+  grpc_stats_per_cpu_storage = static_cast<grpc_stats_data*>(
+      gpr_zalloc(sizeof(grpc_stats_data) * g_num_cores));
 }
 
 void grpc_stats_shutdown(void) { gpr_free(grpc_stats_per_cpu_storage); }
@@ -76,14 +76,15 @@ int grpc_stats_histo_find_bucket_slow(int value, const int* table,
       table_size = step;
     }
   }
-  return (int)(table - start) - 1;
+  return static_cast<int>(table - start) - 1;
 }
 
 size_t grpc_stats_histo_count(const grpc_stats_data* stats,
                               grpc_stats_histograms histogram) {
   size_t sum = 0;
   for (int i = 0; i < grpc_stats_histo_buckets[histogram]; i++) {
-    sum += (size_t)stats->histograms[grpc_stats_histo_start[histogram] + i];
+    sum += static_cast<size_t>(
+        stats->histograms[grpc_stats_histo_start[histogram] + i]);
   }
   return sum;
 }
@@ -100,7 +101,7 @@ static double threshold_for_count_below(const gpr_atm* bucket_counts,
   /* find the lowest bucket that gets us above count_below */
   count_so_far = 0.0;
   for (lower_idx = 0; lower_idx < num_buckets; lower_idx++) {
-    count_so_far += (double)bucket_counts[lower_idx];
+    count_so_far += static_cast<double>(bucket_counts[lower_idx]);
     if (count_so_far >= count_below) {
       break;
     }
@@ -121,7 +122,7 @@ static double threshold_for_count_below(const gpr_atm* bucket_counts,
     upper_bound = bucket_boundaries[lower_idx + 1];
     return upper_bound - (upper_bound - lower_bound) *
                              (count_so_far - count_below) /
-                             (double)bucket_counts[lower_idx];
+                             static_cast<double>(bucket_counts[lower_idx]);
   }
 }
 
@@ -133,7 +134,8 @@ double grpc_stats_histo_percentile(const grpc_stats_data* stats,
   return threshold_for_count_below(
       stats->histograms + grpc_stats_histo_start[histogram],
       grpc_stats_histo_bucket_boundaries[histogram],
-      grpc_stats_histo_buckets[histogram], (double)count * percentile / 100.0);
+      grpc_stats_histo_buckets[histogram],
+      static_cast<double>(count) * percentile / 100.0);
 }
 
 char* grpc_stats_data_as_json(const grpc_stats_data* data) {
diff --git a/src/core/lib/debug/trace.cc b/src/core/lib/debug/trace.cc
index d870bbc5e7..c0cefd0639 100644
--- a/src/core/lib/debug/trace.cc
+++ b/src/core/lib/debug/trace.cc
@@ -88,11 +88,11 @@ static void add(const char* beg, const char* end, char*** ss, size_t* ns) {
   char* s;
   size_t len;
   GPR_ASSERT(end >= beg);
-  len = (size_t)(end - beg);
-  s = (char*)gpr_malloc(len + 1);
+  len = static_cast<size_t>(end - beg);
+  s = static_cast<char*>(gpr_malloc(len + 1));
   memcpy(s, beg, len);
   s[len] = 0;
-  *ss = (char**)gpr_realloc(*ss, sizeof(char**) * np);
+  *ss = static_cast<char**>(gpr_realloc(*ss, sizeof(char**) * np));
   (*ss)[n] = s;
   *ns = np;
 }
diff --git a/src/core/lib/gpr/alloc.cc b/src/core/lib/gpr/alloc.cc
index b1d1550630..e0d25963ed 100644
--- a/src/core/lib/gpr/alloc.cc
+++ b/src/core/lib/gpr/alloc.cc
@@ -95,4 +95,4 @@ void* gpr_malloc_aligned(size_t size, size_t alignment) {
   return (void*)ret;
 }
 
-void gpr_free_aligned(void* ptr) { gpr_free(((void**)ptr)[-1]); }
+void gpr_free_aligned(void* ptr) { gpr_free((static_cast<void**>(ptr))[-1]); }
diff --git a/src/core/lib/gpr/arena.cc b/src/core/lib/gpr/arena.cc
index 5a8d7ff6ec..2d514df68b 100644
--- a/src/core/lib/gpr/arena.cc
+++ b/src/core/lib/gpr/arena.cc
@@ -51,8 +51,8 @@ static void* zalloc_aligned(size_t size) {
 
 gpr_arena* gpr_arena_create(size_t initial_size) {
   initial_size = ROUND_UP_TO_ALIGNMENT_SIZE(initial_size);
-  gpr_arena* a = (gpr_arena*)zalloc_aligned(
-      ROUND_UP_TO_ALIGNMENT_SIZE(sizeof(gpr_arena)) + initial_size);
+  gpr_arena* a = static_cast<gpr_arena*>(zalloc_aligned(
+      ROUND_UP_TO_ALIGNMENT_SIZE(sizeof(gpr_arena)) + initial_size));
   a->initial_zone.size_end = initial_size;
   return a;
 }
@@ -66,23 +66,25 @@ size_t gpr_arena_destroy(gpr_arena* arena) {
     gpr_free_aligned(z);
     z = next_z;
   }
-  return (size_t)size;
+  return static_cast<size_t>(size);
 }
 
 void* gpr_arena_alloc(gpr_arena* arena, size_t size) {
   size = ROUND_UP_TO_ALIGNMENT_SIZE(size);
-  size_t start =
-      (size_t)gpr_atm_no_barrier_fetch_add(&arena->size_so_far, size);
+  size_t start = static_cast<size_t>(
+      gpr_atm_no_barrier_fetch_add(&arena->size_so_far, size));
   zone* z = &arena->initial_zone;
   while (start > z->size_end) {
     zone* next_z = (zone*)gpr_atm_acq_load(&z->next_atm);
     if (next_z == nullptr) {
-      size_t next_z_size = (size_t)gpr_atm_no_barrier_load(&arena->size_so_far);
-      next_z = (zone*)zalloc_aligned(ROUND_UP_TO_ALIGNMENT_SIZE(sizeof(zone)) +
-                                     next_z_size);
+      size_t next_z_size =
+          static_cast<size_t>(gpr_atm_no_barrier_load(&arena->size_so_far));
+      next_z = static_cast<zone*>(zalloc_aligned(
+          ROUND_UP_TO_ALIGNMENT_SIZE(sizeof(zone)) + next_z_size));
       next_z->size_begin = z->size_end;
       next_z->size_end = z->size_end + next_z_size;
-      if (!gpr_atm_rel_cas(&z->next_atm, (gpr_atm)NULL, (gpr_atm)next_z)) {
+      if (!gpr_atm_rel_cas(&z->next_atm, static_cast<gpr_atm>(NULL),
+                           (gpr_atm)next_z)) {
         gpr_free_aligned(next_z);
         next_z = (zone*)gpr_atm_acq_load(&z->next_atm);
       }
@@ -95,7 +97,9 @@ void* gpr_arena_alloc(gpr_arena* arena, size_t size) {
   GPR_ASSERT(start >= z->size_begin);
   GPR_ASSERT(start + size <= z->size_end);
   char* ptr = (z == &arena->initial_zone)
-                  ? (char*)arena + ROUND_UP_TO_ALIGNMENT_SIZE(sizeof(gpr_arena))
-                  : (char*)z + ROUND_UP_TO_ALIGNMENT_SIZE(sizeof(zone));
+                  ? reinterpret_cast<char*>(arena) +
+                        ROUND_UP_TO_ALIGNMENT_SIZE(sizeof(gpr_arena))
+                  : reinterpret_cast<char*>(z) +
+                        ROUND_UP_TO_ALIGNMENT_SIZE(sizeof(zone));
   return ptr + start - z->size_begin;
 }
diff --git a/src/core/lib/gpr/cpu_linux.cc b/src/core/lib/gpr/cpu_linux.cc
index 21b1a71dc9..4782f9f742 100644
--- a/src/core/lib/gpr/cpu_linux.cc
+++ b/src/core/lib/gpr/cpu_linux.cc
@@ -45,7 +45,7 @@ static void init_num_cpus() {
 #endif
   /* This must be signed. sysconf returns -1 when the number cannot be
      determined */
-  ncpus = (int)sysconf(_SC_NPROCESSORS_ONLN);
+  ncpus = static_cast<int>(sysconf(_SC_NPROCESSORS_ONLN));
   if (ncpus < 1) {
     gpr_log(GPR_ERROR, "Cannot determine number of CPUs: assuming 1");
     ncpus = 1;
@@ -55,7 +55,7 @@ static void init_num_cpus() {
 unsigned gpr_cpu_num_cores(void) {
   static gpr_once once = GPR_ONCE_INIT;
   gpr_once_init(&once, init_num_cpus);
-  return (unsigned)ncpus;
+  return static_cast<unsigned>(ncpus);
 }
 
 unsigned gpr_cpu_current_cpu(void) {
@@ -71,7 +71,7 @@ unsigned gpr_cpu_current_cpu(void) {
     gpr_log(GPR_ERROR, "Error determining current CPU: %s\n", strerror(errno));
     return 0;
   }
-  return (unsigned)cpu;
+  return static_cast<unsigned>(cpu);
 #endif
 }
 
diff --git a/src/core/lib/gpr/host_port.cc b/src/core/lib/gpr/host_port.cc
index 0776727906..5a03a16296 100644
--- a/src/core/lib/gpr/host_port.cc
+++ b/src/core/lib/gpr/host_port.cc
@@ -62,7 +62,7 @@ int gpr_split_host_port(const char* name, char** host, char** port) {
       return 0;
     }
     host_start = name + 1;
-    host_len = (size_t)(rbracket - host_start);
+    host_len = static_cast<size_t>(rbracket - host_start);
     if (memchr(host_start, ':', host_len) == nullptr) {
       /* Require all bracketed hosts to contain a colon, because a hostname or
          IPv4 address should never use brackets. */
@@ -73,7 +73,7 @@ int gpr_split_host_port(const char* name, char** host, char** port) {
     if (colon != nullptr && strchr(colon + 1, ':') == nullptr) {
       /* Exactly 1 colon.  Split into host:port. */
       host_start = name;
-      host_len = (size_t)(colon - name);
+      host_len = static_cast<size_t>(colon - name);
       port_start = colon + 1;
     } else {
       /* 0 or 2+ colons.  Bare hostname or IPv6 litearal. */
@@ -84,7 +84,7 @@ int gpr_split_host_port(const char* name, char** host, char** port) {
   }
 
   /* Allocate return values. */
-  *host = (char*)gpr_malloc(host_len + 1);
+  *host = static_cast<char*>(gpr_malloc(host_len + 1));
   memcpy(*host, host_start, host_len);
   (*host)[host_len] = '\0';
 
diff --git a/src/core/lib/gpr/log.cc b/src/core/lib/gpr/log.cc
index 19c0f6c34d..410096c0f7 100644
--- a/src/core/lib/gpr/log.cc
+++ b/src/core/lib/gpr/log.cc
@@ -45,7 +45,8 @@ const char* gpr_log_severity_string(gpr_log_severity severity) {
 
 void gpr_log_message(const char* file, int line, gpr_log_severity severity,
                      const char* message) {
-  if ((gpr_atm)severity < gpr_atm_no_barrier_load(&g_min_severity_to_print)) {
+  if (static_cast<gpr_atm>(severity) <
+      gpr_atm_no_barrier_load(&g_min_severity_to_print)) {
     return;
   }
 
@@ -70,11 +71,11 @@ void gpr_log_verbosity_init() {
   gpr_atm min_severity_to_print = GPR_LOG_SEVERITY_ERROR;
   if (verbosity != nullptr) {
     if (gpr_stricmp(verbosity, "DEBUG") == 0) {
-      min_severity_to_print = (gpr_atm)GPR_LOG_SEVERITY_DEBUG;
+      min_severity_to_print = static_cast<gpr_atm>(GPR_LOG_SEVERITY_DEBUG);
     } else if (gpr_stricmp(verbosity, "INFO") == 0) {
-      min_severity_to_print = (gpr_atm)GPR_LOG_SEVERITY_INFO;
+      min_severity_to_print = static_cast<gpr_atm>(GPR_LOG_SEVERITY_INFO);
     } else if (gpr_stricmp(verbosity, "ERROR") == 0) {
-      min_severity_to_print = (gpr_atm)GPR_LOG_SEVERITY_ERROR;
+      min_severity_to_print = static_cast<gpr_atm>(GPR_LOG_SEVERITY_ERROR);
     }
     gpr_free(verbosity);
   }
diff --git a/src/core/lib/gpr/log_linux.cc b/src/core/lib/gpr/log_linux.cc
index 6b1f1c71e4..d743eedf38 100644
--- a/src/core/lib/gpr/log_linux.cc
+++ b/src/core/lib/gpr/log_linux.cc
@@ -67,7 +67,7 @@ void gpr_default_log(gpr_log_func_args* args) {
   static __thread long tid = 0;
   if (tid == 0) tid = gettid();
 
-  timer = (time_t)now.tv_sec;
+  timer = static_cast<time_t>(now.tv_sec);
   final_slash = strrchr(args->file, '/');
   if (final_slash == nullptr)
     display_file = args->file;
diff --git a/src/core/lib/gpr/murmur_hash.cc b/src/core/lib/gpr/murmur_hash.cc
index 3f5e04d211..01a7290c67 100644
--- a/src/core/lib/gpr/murmur_hash.cc
+++ b/src/core/lib/gpr/murmur_hash.cc
@@ -36,7 +36,7 @@ uint32_t gpr_murmur_hash3(const void* key, size_t len, uint32_t seed) {
   const uint32_t c1 = 0xcc9e2d51;
   const uint32_t c2 = 0x1b873593;
 
-  const uint8_t* keyptr = (const uint8_t*)key;
+  const uint8_t* keyptr = static_cast<const uint8_t*>(key);
   const size_t bsize = sizeof(k1);
   const size_t nblocks = len / bsize;
 
@@ -58,10 +58,10 @@ uint32_t gpr_murmur_hash3(const void* key, size_t len, uint32_t seed) {
   /* tail */
   switch (len & 3) {
     case 3:
-      k1 ^= ((uint32_t)keyptr[2]) << 16;
+      k1 ^= (static_cast<uint32_t>(keyptr[2])) << 16;
     /* fallthrough */
     case 2:
-      k1 ^= ((uint32_t)keyptr[1]) << 8;
+      k1 ^= (static_cast<uint32_t>(keyptr[1])) << 8;
     /* fallthrough */
     case 1:
       k1 ^= keyptr[0];
@@ -72,7 +72,7 @@ uint32_t gpr_murmur_hash3(const void* key, size_t len, uint32_t seed) {
   };
 
   /* finalization */
-  h1 ^= (uint32_t)len;
+  h1 ^= static_cast<uint32_t>(len);
   FMIX32(h1);
   return h1;
 }
diff --git a/src/core/lib/gpr/string.cc b/src/core/lib/gpr/string.cc
index 6b360e4013..5a16377e49 100644
--- a/src/core/lib/gpr/string.cc
+++ b/src/core/lib/gpr/string.cc
@@ -40,7 +40,7 @@ char* gpr_strdup(const char* src) {
   }
 
   len = strlen(src) + 1;
-  dst = (char*)gpr_malloc(len);
+  dst = static_cast<char*>(gpr_malloc(len));
 
   memcpy(dst, src, len);
 
@@ -61,7 +61,7 @@ static dump_out dump_out_create(void) {
 static void dump_out_append(dump_out* out, char c) {
   if (out->length == out->capacity) {
     out->capacity = GPR_MAX(8, 2 * out->capacity);
-    out->data = (char*)gpr_realloc(out->data, out->capacity);
+    out->data = static_cast<char*>(gpr_realloc(out->data, out->capacity));
   }
   out->data[out->length++] = c;
 }
@@ -69,7 +69,7 @@ static void dump_out_append(dump_out* out, char c) {
 static void hexdump(dump_out* out, const char* buf, size_t len) {
   static const char* hex = "0123456789abcdef";
 
-  const uint8_t* const beg = (const uint8_t*)buf;
+  const uint8_t* const beg = reinterpret_cast<const uint8_t*>(buf);
   const uint8_t* const end = beg + len;
   const uint8_t* cur;
 
@@ -81,7 +81,7 @@ static void hexdump(dump_out* out, const char* buf, size_t len) {
 }
 
 static void asciidump(dump_out* out, const char* buf, size_t len) {
-  const uint8_t* const beg = (const uint8_t*)buf;
+  const uint8_t* const beg = reinterpret_cast<const uint8_t*>(buf);
   const uint8_t* const end = beg + len;
   const uint8_t* cur;
   int out_was_empty = (out->length == 0);
@@ -90,7 +90,7 @@ static void asciidump(dump_out* out, const char* buf, size_t len) {
     dump_out_append(out, '\'');
   }
   for (cur = beg; cur != end; ++cur) {
-    dump_out_append(out, (char)(isprint(*cur) ? *(char*)cur : '.'));
+    dump_out_append(out, (isprint(*cur) ? *(char*)cur : '.'));
   }
   if (!out_was_empty) {
     dump_out_append(out, '\'');
@@ -118,7 +118,7 @@ int gpr_parse_bytes_to_uint32(const char* buf, size_t len, uint32_t* result) {
 
   for (i = 0; i < len; i++) {
     if (buf[i] < '0' || buf[i] > '9') return 0; /* bad char */
-    new_val = 10 * out + (uint32_t)(buf[i] - '0');
+    new_val = 10 * out + static_cast<uint32_t>(buf[i] - '0');
     if (new_val < out) return 0; /* overflow */
     out = new_val;
   }
@@ -148,7 +148,7 @@ int gpr_ltoa(long value, char* string) {
 
   sign = value < 0 ? -1 : 1;
   while (value) {
-    string[i++] = (char)('0' + sign * (value % 10));
+    string[i++] = static_cast<char>('0' + sign * (value % 10));
     value /= 10;
   }
   if (sign < 0) string[i++] = '-';
@@ -169,7 +169,7 @@ int int64_ttoa(int64_t value, char* string) {
 
   sign = value < 0 ? -1 : 1;
   while (value) {
-    string[i++] = (char)('0' + sign * (value % 10));
+    string[i++] = static_cast<char>('0' + sign * (value % 10));
     value /= 10;
   }
   if (sign < 0) string[i++] = '-';
@@ -182,13 +182,13 @@ int gpr_parse_nonnegative_int(const char* value) {
   char* end;
   long result = strtol(value, &end, 0);
   if (*end != '\0' || result < 0 || result > INT_MAX) return -1;
-  return (int)result;
+  return static_cast<int>(result);
 }
 
 char* gpr_leftpad(const char* str, char flag, size_t length) {
   const size_t str_length = strlen(str);
   const size_t out_length = str_length > length ? str_length : length;
-  char* out = (char*)gpr_malloc(out_length + 1);
+  char* out = static_cast<char*>(gpr_malloc(out_length + 1));
   memset(out, flag, out_length - str_length);
   memcpy(out + out_length - str_length, str, str_length);
   out[out_length] = 0;
@@ -212,7 +212,7 @@ char* gpr_strjoin_sep(const char** strs, size_t nstrs, const char* sep,
   if (nstrs > 0) {
     out_length += sep_len * (nstrs - 1); /* separators */
   }
-  out = (char*)gpr_malloc(out_length);
+  out = static_cast<char*>(gpr_malloc(out_length));
   out_length = 0;
   for (i = 0; i < nstrs; i++) {
     const size_t slen = strlen(strs[i]);
@@ -243,7 +243,8 @@ void gpr_strvec_destroy(gpr_strvec* sv) {
 void gpr_strvec_add(gpr_strvec* sv, char* str) {
   if (sv->count == sv->capacity) {
     sv->capacity = GPR_MAX(sv->capacity + 8, sv->capacity * 2);
-    sv->strs = (char**)gpr_realloc(sv->strs, sizeof(char*) * sv->capacity);
+    sv->strs = static_cast<char**>(
+        gpr_realloc(sv->strs, sizeof(char*) * sv->capacity));
   }
   sv->strs[sv->count++] = str;
 }
@@ -265,12 +266,13 @@ int gpr_stricmp(const char* a, const char* b) {
 
 static void add_string_to_split(const char* beg, const char* end, char*** strs,
                                 size_t* nstrs, size_t* capstrs) {
-  char* out = (char*)gpr_malloc((size_t)(end - beg) + 1);
-  memcpy(out, beg, (size_t)(end - beg));
+  char* out =
+      static_cast<char*>(gpr_malloc(static_cast<size_t>(end - beg) + 1));
+  memcpy(out, beg, static_cast<size_t>(end - beg));
   out[end - beg] = 0;
   if (*nstrs == *capstrs) {
     *capstrs = GPR_MAX(8, 2 * *capstrs);
-    *strs = (char**)gpr_realloc(*strs, sizeof(*strs) * *capstrs);
+    *strs = static_cast<char**>(gpr_realloc(*strs, sizeof(*strs) * *capstrs));
   }
   (*strs)[*nstrs] = out;
   ++*nstrs;
diff --git a/src/core/lib/gpr/string_posix.cc b/src/core/lib/gpr/string_posix.cc
index 8b818e39b9..d32775fb3b 100644
--- a/src/core/lib/gpr/string_posix.cc
+++ b/src/core/lib/gpr/string_posix.cc
@@ -43,8 +43,8 @@ int gpr_asprintf(char** strp, const char* format, ...) {
   }
 
   /* Allocate a new buffer, with space for the NUL terminator. */
-  strp_buflen = (size_t)ret + 1;
-  if ((*strp = (char*)gpr_malloc(strp_buflen)) == nullptr) {
+  strp_buflen = static_cast<size_t>(ret) + 1;
+  if ((*strp = static_cast<char*>(gpr_malloc(strp_buflen))) == nullptr) {
     /* This shouldn't happen, because gpr_malloc() calls abort(). */
     return -1;
   }
@@ -59,7 +59,7 @@ int gpr_asprintf(char** strp, const char* format, ...) {
   va_start(args, format);
   ret = vsnprintf(*strp, strp_buflen, format, args);
   va_end(args);
-  if ((size_t)ret == strp_buflen - 1) {
+  if (static_cast<size_t>(ret) == strp_buflen - 1) {
     return ret;
   }
 
diff --git a/src/core/lib/gpr/sync_posix.cc b/src/core/lib/gpr/sync_posix.cc
index f23a8b2486..848d23730c 100644
--- a/src/core/lib/gpr/sync_posix.cc
+++ b/src/core/lib/gpr/sync_posix.cc
@@ -84,7 +84,7 @@ int gpr_cv_wait(gpr_cv* cv, gpr_mu* mu, gpr_timespec abs_deadline) {
 #else
     abs_deadline = gpr_convert_clock_type(abs_deadline, GPR_CLOCK_REALTIME);
 #endif  // GPR_LINUX
-    abs_deadline_ts.tv_sec = (time_t)abs_deadline.tv_sec;
+    abs_deadline_ts.tv_sec = static_cast<time_t>(abs_deadline.tv_sec);
     abs_deadline_ts.tv_nsec = abs_deadline.tv_nsec;
     err = pthread_cond_timedwait(cv, mu, &abs_deadline_ts);
   }
diff --git a/src/core/lib/gpr/thd_posix.cc b/src/core/lib/gpr/thd_posix.cc
index 683fd4575e..e8730b9c66 100644
--- a/src/core/lib/gpr/thd_posix.cc
+++ b/src/core/lib/gpr/thd_posix.cc
@@ -49,7 +49,7 @@ static void dec_thd_count();
 
 /* Body of every thread started via gpr_thd_new. */
 static void* thread_body(void* v) {
-  struct thd_arg a = *(struct thd_arg*)v;
+  struct thd_arg a = *static_cast<struct thd_arg*>(v);
   free(v);
   if (a.name != nullptr) {
 #if GPR_APPLE_PTHREAD_NAME
@@ -77,7 +77,7 @@ int gpr_thd_new(gpr_thd_id* t, const char* thd_name,
   pthread_t p;
   /* don't use gpr_malloc as we may cause an infinite recursion with
    * the profiling code */
-  struct thd_arg* a = (struct thd_arg*)malloc(sizeof(*a));
+  struct thd_arg* a = static_cast<struct thd_arg*>(malloc(sizeof(*a)));
   GPR_ASSERT(a != nullptr);
   a->body = thd_body;
   a->arg = arg;
diff --git a/src/core/lib/gpr/time.cc b/src/core/lib/gpr/time.cc
index 6903674d75..39ebeb4339 100644
--- a/src/core/lib/gpr/time.cc
+++ b/src/core/lib/gpr/time.cc
@@ -81,8 +81,9 @@ static gpr_timespec to_seconds_from_sub_second_time(int64_t time_in_units,
                     units_per_sec) -
                    1;
     }
-    out.tv_nsec = (int32_t)((time_in_units - out.tv_sec * units_per_sec) *
-                            GPR_NS_PER_SEC / units_per_sec);
+    out.tv_nsec =
+        static_cast<int32_t>((time_in_units - out.tv_sec * units_per_sec) *
+                             GPR_NS_PER_SEC / units_per_sec);
     out.clock_type = type;
   }
   return out;
@@ -216,12 +217,13 @@ int32_t gpr_time_to_millis(gpr_timespec t) {
        care?) */
     return -2147483647;
   } else {
-    return (int32_t)(t.tv_sec * GPR_MS_PER_SEC + t.tv_nsec / GPR_NS_PER_MS);
+    return static_cast<int32_t>(t.tv_sec * GPR_MS_PER_SEC +
+                                t.tv_nsec / GPR_NS_PER_MS);
   }
 }
 
 double gpr_timespec_to_micros(gpr_timespec t) {
-  return (double)t.tv_sec * GPR_US_PER_SEC + t.tv_nsec * 1e-3;
+  return static_cast<double>(t.tv_sec) * GPR_US_PER_SEC + t.tv_nsec * 1e-3;
 }
 
 gpr_timespec gpr_convert_clock_type(gpr_timespec t, gpr_clock_type clock_type) {
diff --git a/src/core/lib/gpr/time_posix.cc b/src/core/lib/gpr/time_posix.cc
index 9c7e86b080..09171c9c48 100644
--- a/src/core/lib/gpr/time_posix.cc
+++ b/src/core/lib/gpr/time_posix.cc
@@ -37,7 +37,7 @@ static struct timespec timespec_from_gpr(gpr_timespec gts) {
     /* fine to assert, as this is only used in gpr_sleep_until */
     GPR_ASSERT(gts.tv_sec <= INT32_MAX && gts.tv_sec >= INT32_MIN);
   }
-  rv.tv_sec = (time_t)gts.tv_sec;
+  rv.tv_sec = static_cast<time_t>(gts.tv_sec);
   rv.tv_nsec = gts.tv_nsec;
   return rv;
 }
@@ -52,7 +52,7 @@ static gpr_timespec gpr_from_timespec(struct timespec ts,
    */
   gpr_timespec rv;
   rv.tv_sec = ts.tv_sec;
-  rv.tv_nsec = (int32_t)ts.tv_nsec;
+  rv.tv_nsec = static_cast<int32_t>(ts.tv_nsec);
   rv.clock_type = clock_type;
   return rv;
 }
diff --git a/src/core/lib/http/format_request.cc b/src/core/lib/http/format_request.cc
index 884a70e550..6581bef7cd 100644
--- a/src/core/lib/http/format_request.cc
+++ b/src/core/lib/http/format_request.cc
@@ -89,7 +89,8 @@ grpc_slice grpc_httpcli_format_post_request(const grpc_httpcli_request* request,
     if (!has_content_type) {
       gpr_strvec_add(&out, gpr_strdup("Content-Type: text/plain\r\n"));
     }
-    gpr_asprintf(&tmp, "Content-Length: %lu\r\n", (unsigned long)body_size);
+    gpr_asprintf(&tmp, "Content-Length: %lu\r\n",
+                 static_cast<unsigned long>(body_size));
     gpr_strvec_add(&out, tmp);
   }
   gpr_strvec_add(&out, gpr_strdup("\r\n"));
@@ -97,7 +98,7 @@ grpc_slice grpc_httpcli_format_post_request(const grpc_httpcli_request* request,
   gpr_strvec_destroy(&out);
 
   if (body_bytes) {
-    tmp = (char*)gpr_realloc(tmp, out_len + body_size);
+    tmp = static_cast<char*>(gpr_realloc(tmp, out_len + body_size));
     memcpy(tmp + out_len, body_bytes, body_size);
     out_len += body_size;
   }
diff --git a/src/core/lib/http/httpcli.cc b/src/core/lib/http/httpcli.cc
index 9775ed08ad..2cdca48487 100644
--- a/src/core/lib/http/httpcli.cc
+++ b/src/core/lib/http/httpcli.cc
@@ -123,7 +123,7 @@ static void do_read(internal_request* req) {
 }
 
 static void on_read(void* user_data, grpc_error* error) {
-  internal_request* req = (internal_request*)user_data;
+  internal_request* req = static_cast<internal_request*>(user_data);
   size_t i;
 
   for (i = 0; i < req->incoming.count; i++) {
@@ -150,7 +150,7 @@ static void on_read(void* user_data, grpc_error* error) {
 static void on_written(internal_request* req) { do_read(req); }
 
 static void done_write(void* arg, grpc_error* error) {
-  internal_request* req = (internal_request*)arg;
+  internal_request* req = static_cast<internal_request*>(arg);
   if (error == GRPC_ERROR_NONE) {
     on_written(req);
   } else {
@@ -165,7 +165,7 @@ static void start_write(internal_request* req) {
 }
 
 static void on_handshake_done(void* arg, grpc_endpoint* ep) {
-  internal_request* req = (internal_request*)arg;
+  internal_request* req = static_cast<internal_request*>(arg);
 
   if (!ep) {
     next_address(req, GRPC_ERROR_CREATE_FROM_STATIC_STRING(
@@ -178,7 +178,7 @@ static void on_handshake_done(void* arg, grpc_endpoint* ep) {
 }
 
 static void on_connected(void* arg, grpc_error* error) {
-  internal_request* req = (internal_request*)arg;
+  internal_request* req = static_cast<internal_request*>(arg);
 
   if (!req->ep) {
     next_address(req, GRPC_ERROR_REF(error));
@@ -212,7 +212,7 @@ static void next_address(internal_request* req, grpc_error* error) {
 }
 
 static void on_resolved(void* arg, grpc_error* error) {
-  internal_request* req = (internal_request*)arg;
+  internal_request* req = static_cast<internal_request*>(arg);
   if (error != GRPC_ERROR_NONE) {
     finish(req, GRPC_ERROR_REF(error));
     return;
@@ -229,7 +229,7 @@ static void internal_request_begin(grpc_httpcli_context* context,
                                    grpc_httpcli_response* response,
                                    const char* name, grpc_slice request_text) {
   internal_request* req =
-      (internal_request*)gpr_malloc(sizeof(internal_request));
+      static_cast<internal_request*>(gpr_malloc(sizeof(internal_request)));
   memset(req, 0, sizeof(*req));
   req->request_text = request_text;
   grpc_http_parser_init(&req->parser, GRPC_HTTP_RESPONSE, response);
diff --git a/src/core/lib/http/httpcli_security_connector.cc b/src/core/lib/http/httpcli_security_connector.cc
index 8664418144..d754558060 100644
--- a/src/core/lib/http/httpcli_security_connector.cc
+++ b/src/core/lib/http/httpcli_security_connector.cc
@@ -40,7 +40,7 @@ typedef struct {
 
 static void httpcli_ssl_destroy(grpc_security_connector* sc) {
   grpc_httpcli_ssl_channel_security_connector* c =
-      (grpc_httpcli_ssl_channel_security_connector*)sc;
+      reinterpret_cast<grpc_httpcli_ssl_channel_security_connector*>(sc);
   if (c->handshaker_factory != nullptr) {
     tsi_ssl_client_handshaker_factory_unref(c->handshaker_factory);
     c->handshaker_factory = nullptr;
@@ -52,7 +52,7 @@ static void httpcli_ssl_destroy(grpc_security_connector* sc) {
 static void httpcli_ssl_add_handshakers(grpc_channel_security_connector* sc,
                                         grpc_handshake_manager* handshake_mgr) {
   grpc_httpcli_ssl_channel_security_connector* c =
-      (grpc_httpcli_ssl_channel_security_connector*)sc;
+      reinterpret_cast<grpc_httpcli_ssl_channel_security_connector*>(sc);
   tsi_handshaker* handshaker = nullptr;
   if (c->handshaker_factory != nullptr) {
     tsi_result result = tsi_ssl_client_handshaker_factory_create_handshaker(
@@ -71,7 +71,7 @@ static void httpcli_ssl_check_peer(grpc_security_connector* sc, tsi_peer peer,
                                    grpc_auth_context** auth_context,
                                    grpc_closure* on_peer_checked) {
   grpc_httpcli_ssl_channel_security_connector* c =
-      (grpc_httpcli_ssl_channel_security_connector*)sc;
+      reinterpret_cast<grpc_httpcli_ssl_channel_security_connector*>(sc);
   grpc_error* error = GRPC_ERROR_NONE;
 
   /* Check the peer name. */
@@ -90,9 +90,9 @@ static void httpcli_ssl_check_peer(grpc_security_connector* sc, tsi_peer peer,
 static int httpcli_ssl_cmp(grpc_security_connector* sc1,
                            grpc_security_connector* sc2) {
   grpc_httpcli_ssl_channel_security_connector* c1 =
-      (grpc_httpcli_ssl_channel_security_connector*)sc1;
+      reinterpret_cast<grpc_httpcli_ssl_channel_security_connector*>(sc1);
   grpc_httpcli_ssl_channel_security_connector* c2 =
-      (grpc_httpcli_ssl_channel_security_connector*)sc2;
+      reinterpret_cast<grpc_httpcli_ssl_channel_security_connector*>(sc2);
   return strcmp(c1->secure_peer_name, c2->secure_peer_name);
 }
 
@@ -111,8 +111,8 @@ static grpc_security_status httpcli_ssl_channel_security_connector_create(
     return GRPC_SECURITY_ERROR;
   }
 
-  c = (grpc_httpcli_ssl_channel_security_connector*)gpr_zalloc(
-      sizeof(grpc_httpcli_ssl_channel_security_connector));
+  c = static_cast<grpc_httpcli_ssl_channel_security_connector*>(
+      gpr_zalloc(sizeof(grpc_httpcli_ssl_channel_security_connector)));
 
   gpr_ref_init(&c->base.base.refcount, 1);
   c->base.base.vtable = &httpcli_ssl_vtable;
@@ -146,8 +146,8 @@ typedef struct {
 } on_done_closure;
 
 static void on_handshake_done(void* arg, grpc_error* error) {
-  grpc_handshaker_args* args = (grpc_handshaker_args*)arg;
-  on_done_closure* c = (on_done_closure*)args->user_data;
+  grpc_handshaker_args* args = static_cast<grpc_handshaker_args*>(arg);
+  on_done_closure* c = static_cast<on_done_closure*>(args->user_data);
   if (error != GRPC_ERROR_NONE) {
     const char* msg = grpc_error_string(error);
     gpr_log(GPR_ERROR, "Secure transport setup failed: %s", msg);
@@ -166,7 +166,7 @@ static void on_handshake_done(void* arg, grpc_error* error) {
 static void ssl_handshake(void* arg, grpc_endpoint* tcp, const char* host,
                           grpc_millis deadline,
                           void (*on_done)(void* arg, grpc_endpoint* endpoint)) {
-  on_done_closure* c = (on_done_closure*)gpr_malloc(sizeof(*c));
+  on_done_closure* c = static_cast<on_done_closure*>(gpr_malloc(sizeof(*c)));
   const char* pem_root_certs = grpc_get_default_ssl_roots();
   if (pem_root_certs == nullptr) {
     gpr_log(GPR_ERROR, "Could not get default pem root certs.");
diff --git a/src/core/lib/http/parser.cc b/src/core/lib/http/parser.cc
index ee6941fde3..724b6d1885 100644
--- a/src/core/lib/http/parser.cc
+++ b/src/core/lib/http/parser.cc
@@ -29,7 +29,7 @@
 grpc_core::TraceFlag grpc_http1_trace(false, "http1");
 
 static char* buf2str(void* buffer, size_t length) {
-  char* out = (char*)gpr_malloc(length + 1);
+  char* out = static_cast<char*>(gpr_malloc(length + 1));
   memcpy(out, buffer, length);
   out[length] = 0;
   return out;
@@ -88,14 +88,15 @@ static grpc_error* handle_request_line(grpc_http_parser* parser) {
   if (cur == end)
     return GRPC_ERROR_CREATE_FROM_STATIC_STRING(
         "No method on HTTP request line");
-  parser->http.request->method = buf2str(beg, (size_t)(cur - beg - 1));
+  parser->http.request->method =
+      buf2str(beg, static_cast<size_t>(cur - beg - 1));
 
   beg = cur;
   while (cur != end && *cur++ != ' ')
     ;
   if (cur == end)
     return GRPC_ERROR_CREATE_FROM_STATIC_STRING("No path on HTTP request line");
-  parser->http.request->path = buf2str(beg, (size_t)(cur - beg - 1));
+  parser->http.request->path = buf2str(beg, static_cast<size_t>(cur - beg - 1));
 
   if (cur == end || *cur++ != 'H')
     return GRPC_ERROR_CREATE_FROM_STATIC_STRING("Expected 'H'");
@@ -107,12 +108,12 @@ static grpc_error* handle_request_line(grpc_http_parser* parser) {
     return GRPC_ERROR_CREATE_FROM_STATIC_STRING("Expected 'P'");
   if (cur == end || *cur++ != '/')
     return GRPC_ERROR_CREATE_FROM_STATIC_STRING("Expected '/'");
-  vers_major = (uint8_t)(*cur++ - '1' + 1);
+  vers_major = static_cast<uint8_t>(*cur++ - '1' + 1);
   ++cur;
   if (cur == end)
     return GRPC_ERROR_CREATE_FROM_STATIC_STRING(
         "End of line in HTTP version string");
-  vers_minor = (uint8_t)(*cur++ - '1' + 1);
+  vers_minor = static_cast<uint8_t>(*cur++ - '1' + 1);
 
   if (vers_major == 1) {
     if (vers_minor == 0) {
@@ -175,14 +176,15 @@ static grpc_error* add_header(grpc_http_parser* parser) {
     goto done;
   }
   GPR_ASSERT(cur >= beg);
-  hdr.key = buf2str(beg, (size_t)(cur - beg));
+  hdr.key = buf2str(beg, static_cast<size_t>(cur - beg));
   cur++; /* skip : */
 
   while (cur != end && (*cur == ' ' || *cur == '\t')) {
     cur++;
   }
   GPR_ASSERT((size_t)(end - cur) >= parser->cur_line_end_length);
-  hdr.value = buf2str(cur, (size_t)(end - cur) - parser->cur_line_end_length);
+  hdr.value = buf2str(
+      cur, static_cast<size_t>(end - cur) - parser->cur_line_end_length);
 
   switch (parser->type) {
     case GRPC_HTTP_RESPONSE:
@@ -198,8 +200,8 @@ static grpc_error* add_header(grpc_http_parser* parser) {
   if (*hdr_count == parser->hdr_capacity) {
     parser->hdr_capacity =
         GPR_MAX(parser->hdr_capacity + 1, parser->hdr_capacity * 3 / 2);
-    *hdrs = (grpc_http_header*)gpr_realloc(
-        *hdrs, parser->hdr_capacity * sizeof(**hdrs));
+    *hdrs = static_cast<grpc_http_header*>(
+        gpr_realloc(*hdrs, parser->hdr_capacity * sizeof(**hdrs)));
   }
   (*hdrs)[(*hdr_count)++] = hdr;
 
@@ -257,9 +259,10 @@ static grpc_error* addbyte_body(grpc_http_parser* parser, uint8_t byte) {
 
   if (*body_length == parser->body_capacity) {
     parser->body_capacity = GPR_MAX(8, parser->body_capacity * 3 / 2);
-    *body = (char*)gpr_realloc((void*)*body, parser->body_capacity);
+    *body =
+        static_cast<char*>(gpr_realloc((void*)*body, parser->body_capacity));
   }
-  (*body)[*body_length] = (char)byte;
+  (*body)[*body_length] = static_cast<char>(byte);
   (*body_length)++;
 
   return GRPC_ERROR_NONE;
diff --git a/src/core/lib/iomgr/call_combiner.cc b/src/core/lib/iomgr/call_combiner.cc
index 0e4c9cb3b3..3b11e0266d 100644
--- a/src/core/lib/iomgr/call_combiner.cc
+++ b/src/core/lib/iomgr/call_combiner.cc
@@ -28,13 +28,13 @@ grpc_core::TraceFlag grpc_call_combiner_trace(false, "call_combiner");
 
 static grpc_error* decode_cancel_state_error(gpr_atm cancel_state) {
   if (cancel_state & 1) {
-    return (grpc_error*)(cancel_state & ~(gpr_atm)1);
+    return (grpc_error*)(cancel_state & ~static_cast<gpr_atm>(1));
   }
   return GRPC_ERROR_NONE;
 }
 
 static gpr_atm encode_cancel_state_error(grpc_error* error) {
-  return (gpr_atm)1 | (gpr_atm)error;
+  return static_cast<gpr_atm>(1) | (gpr_atm)error;
 }
 
 void grpc_call_combiner_init(grpc_call_combiner* call_combiner) {
@@ -68,8 +68,8 @@ void grpc_call_combiner_start(grpc_call_combiner* call_combiner,
             call_combiner, closure DEBUG_FMT_ARGS, reason,
             grpc_error_string(error));
   }
-  size_t prev_size =
-      (size_t)gpr_atm_full_fetch_add(&call_combiner->size, (gpr_atm)1);
+  size_t prev_size = static_cast<size_t>(
+      gpr_atm_full_fetch_add(&call_combiner->size, (gpr_atm)1));
   if (grpc_call_combiner_trace.enabled()) {
     gpr_log(GPR_DEBUG, "  size: %" PRIdPTR " -> %" PRIdPTR, prev_size,
             prev_size + 1);
@@ -90,7 +90,8 @@ void grpc_call_combiner_start(grpc_call_combiner* call_combiner,
     }
     // Queue was not empty, so add closure to queue.
     closure->error_data.error = error;
-    gpr_mpscq_push(&call_combiner->queue, (gpr_mpscq_node*)closure);
+    gpr_mpscq_push(&call_combiner->queue,
+                   reinterpret_cast<gpr_mpscq_node*>(closure));
   }
 }
 
@@ -102,8 +103,8 @@ void grpc_call_combiner_stop(grpc_call_combiner* call_combiner DEBUG_ARGS,
             "==> grpc_call_combiner_stop() [%p] [" DEBUG_FMT_STR "%s]",
             call_combiner DEBUG_FMT_ARGS, reason);
   }
-  size_t prev_size =
-      (size_t)gpr_atm_full_fetch_add(&call_combiner->size, (gpr_atm)-1);
+  size_t prev_size = static_cast<size_t>(
+      gpr_atm_full_fetch_add(&call_combiner->size, (gpr_atm)-1));
   if (grpc_call_combiner_trace.enabled()) {
     gpr_log(GPR_DEBUG, "  size: %" PRIdPTR " -> %" PRIdPTR, prev_size,
             prev_size - 1);
@@ -115,8 +116,8 @@ void grpc_call_combiner_stop(grpc_call_combiner* call_combiner DEBUG_ARGS,
         gpr_log(GPR_DEBUG, "  checking queue");
       }
       bool empty;
-      grpc_closure* closure = (grpc_closure*)gpr_mpscq_pop_and_check_end(
-          &call_combiner->queue, &empty);
+      grpc_closure* closure = reinterpret_cast<grpc_closure*>(
+          gpr_mpscq_pop_and_check_end(&call_combiner->queue, &empty));
       if (closure == nullptr) {
         // This can happen either due to a race condition within the mpscq
         // code or because of a race with grpc_call_combiner_start().
diff --git a/src/core/lib/iomgr/closure.h b/src/core/lib/iomgr/closure.h
index 2bf2578c63..64527d6bb1 100644
--- a/src/core/lib/iomgr/closure.h
+++ b/src/core/lib/iomgr/closure.h
@@ -143,7 +143,7 @@ typedef struct {
 } wrapped_closure;
 
 inline void closure_wrapper(void* arg, grpc_error* error) {
-  wrapped_closure* wc = (wrapped_closure*)arg;
+  wrapped_closure* wc = static_cast<wrapped_closure*>(arg);
   grpc_iomgr_cb_func cb = wc->cb;
   void* cb_arg = wc->cb_arg;
   gpr_free(wc);
@@ -161,7 +161,7 @@ inline grpc_closure* grpc_closure_create(grpc_iomgr_cb_func cb, void* cb_arg,
                                          grpc_closure_scheduler* scheduler) {
 #endif
   closure_impl::wrapped_closure* wc =
-      (closure_impl::wrapped_closure*)gpr_malloc(sizeof(*wc));
+      static_cast<closure_impl::wrapped_closure*>(gpr_malloc(sizeof(*wc)));
   wc->cb = cb;
   wc->cb_arg = cb_arg;
 #ifndef NDEBUG
diff --git a/src/core/lib/iomgr/combiner.cc b/src/core/lib/iomgr/combiner.cc
index 2965d807c1..a7edf17e9b 100644
--- a/src/core/lib/iomgr/combiner.cc
+++ b/src/core/lib/iomgr/combiner.cc
@@ -72,7 +72,7 @@ static const grpc_closure_scheduler_vtable finally_scheduler = {
 static void offload(void* arg, grpc_error* error);
 
 grpc_combiner* grpc_combiner_create(void) {
-  grpc_combiner* lock = (grpc_combiner*)gpr_zalloc(sizeof(*lock));
+  grpc_combiner* lock = static_cast<grpc_combiner*>(gpr_zalloc(sizeof(*lock)));
   gpr_ref_init(&lock->refs, 1);
   lock->scheduler.vtable = &scheduler;
   lock->finally_scheduler.vtable = &finally_scheduler;
@@ -194,7 +194,7 @@ static void move_next() {
 }
 
 static void offload(void* arg, grpc_error* error) {
-  grpc_combiner* lock = (grpc_combiner*)arg;
+  grpc_combiner* lock = static_cast<grpc_combiner*>(arg);
   push_last_on_exec_ctx(lock);
 }
 
@@ -249,7 +249,7 @@ bool grpc_combiner_continue_exec_ctx() {
       return true;
     }
     GPR_TIMER_SCOPE("combiner.exec1", 0);
-    grpc_closure* cl = (grpc_closure*)n;
+    grpc_closure* cl = reinterpret_cast<grpc_closure*>(n);
     grpc_error* cl_err = cl->error_data.error;
 #ifndef NDEBUG
     cl->scheduled = false;
@@ -342,7 +342,8 @@ static void combiner_finally_exec(grpc_closure* closure, grpc_error* error) {
 }
 
 static void enqueue_finally(void* closure, grpc_error* error) {
-  combiner_finally_exec((grpc_closure*)closure, GRPC_ERROR_REF(error));
+  combiner_finally_exec(static_cast<grpc_closure*>(closure),
+                        GRPC_ERROR_REF(error));
 }
 
 grpc_closure_scheduler* grpc_combiner_scheduler(grpc_combiner* combiner) {
diff --git a/src/core/lib/iomgr/error.cc b/src/core/lib/iomgr/error.cc
index d5b5013269..4088cf612e 100644
--- a/src/core/lib/iomgr/error.cc
+++ b/src/core/lib/iomgr/error.cc
@@ -148,7 +148,8 @@ grpc_error* grpc_error_ref(grpc_error* err) {
 static void unref_errs(grpc_error* err) {
   uint8_t slot = err->first_err;
   while (slot != UINT8_MAX) {
-    grpc_linked_error* lerr = (grpc_linked_error*)(err->arena + slot);
+    grpc_linked_error* lerr =
+        reinterpret_cast<grpc_linked_error*>(err->arena + slot);
     GRPC_ERROR_UNREF(lerr->err);
     GPR_ASSERT(err->last_err == slot ? lerr->next == UINT8_MAX
                                      : lerr->next != UINT8_MAX);
@@ -162,7 +163,7 @@ static void unref_strs(grpc_error* err) {
   for (size_t which = 0; which < GRPC_ERROR_STR_MAX; ++which) {
     uint8_t slot = err->strs[which];
     if (slot != UINT8_MAX) {
-      unref_slice(*(grpc_slice*)(err->arena + slot));
+      unref_slice(*reinterpret_cast<grpc_slice*>(err->arena + slot));
     }
   }
 }
@@ -198,18 +199,18 @@ void grpc_error_unref(grpc_error* err) {
 
 static uint8_t get_placement(grpc_error** err, size_t size) {
   GPR_ASSERT(*err);
-  uint8_t slots = (uint8_t)(size / sizeof(intptr_t));
+  uint8_t slots = static_cast<uint8_t>(size / sizeof(intptr_t));
   if ((*err)->arena_size + slots > (*err)->arena_capacity) {
-    (*err)->arena_capacity =
-        (uint8_t)GPR_MIN(UINT8_MAX - 1, (3 * (*err)->arena_capacity / 2));
+    (*err)->arena_capacity = static_cast<uint8_t> GPR_MIN(
+        UINT8_MAX - 1, (3 * (*err)->arena_capacity / 2));
     if ((*err)->arena_size + slots > (*err)->arena_capacity) {
       return UINT8_MAX;
     }
 #ifndef NDEBUG
     grpc_error* orig = *err;
 #endif
-    *err = (grpc_error*)gpr_realloc(
-        *err, sizeof(grpc_error) + (*err)->arena_capacity * sizeof(intptr_t));
+    *err = static_cast<grpc_error*>(gpr_realloc(
+        *err, sizeof(grpc_error) + (*err)->arena_capacity * sizeof(intptr_t)));
 #ifndef NDEBUG
     if (grpc_trace_error_refcount.enabled()) {
       if (*err != orig) {
@@ -219,7 +220,7 @@ static uint8_t get_placement(grpc_error** err, size_t size) {
 #endif
   }
   uint8_t placement = (*err)->arena_size;
-  (*err)->arena_size = (uint8_t)((*err)->arena_size + slots);
+  (*err)->arena_size = static_cast<uint8_t>((*err)->arena_size + slots);
   return placement;
 }
 
@@ -251,7 +252,7 @@ static void internal_set_str(grpc_error** err, grpc_error_strs which,
       return;
     }
   } else {
-    unref_slice(*(grpc_slice*)((*err)->arena + slot));
+    unref_slice(*reinterpret_cast<grpc_slice*>((*err)->arena + slot));
   }
   (*err)->strs[which] = slot;
   memcpy((*err)->arena + slot, &value, sizeof(value));
@@ -291,7 +292,7 @@ static void internal_add_error(grpc_error** err, grpc_error* new_err) {
   } else {
     GPR_ASSERT((*err)->last_err != UINT8_MAX);
     grpc_linked_error* old_last =
-        (grpc_linked_error*)((*err)->arena + (*err)->last_err);
+        reinterpret_cast<grpc_linked_error*>((*err)->arena + (*err)->last_err);
     old_last->next = slot;
     (*err)->last_err = slot;
   }
@@ -315,11 +316,12 @@ grpc_error* grpc_error_create(const char* file, int line, grpc_slice desc,
                               grpc_error** referencing,
                               size_t num_referencing) {
   GPR_TIMER_SCOPE("grpc_error_create", 0);
-  uint8_t initial_arena_capacity = (uint8_t)(
+  uint8_t initial_arena_capacity = static_cast<uint8_t>(
       DEFAULT_ERROR_CAPACITY +
-      (uint8_t)(num_referencing * SLOTS_PER_LINKED_ERROR) + SURPLUS_CAPACITY);
-  grpc_error* err = (grpc_error*)gpr_malloc(
-      sizeof(*err) + initial_arena_capacity * sizeof(intptr_t));
+      static_cast<uint8_t>(num_referencing * SLOTS_PER_LINKED_ERROR) +
+      SURPLUS_CAPACITY);
+  grpc_error* err = static_cast<grpc_error*>(
+      gpr_malloc(sizeof(*err) + initial_arena_capacity * sizeof(intptr_t)));
   if (err == nullptr) {  // TODO(ctiller): make gpr_malloc return NULL
     return GRPC_ERROR_OOM;
   }
@@ -362,7 +364,8 @@ static void ref_strs(grpc_error* err) {
   for (size_t i = 0; i < GRPC_ERROR_STR_MAX; ++i) {
     uint8_t slot = err->strs[i];
     if (slot != UINT8_MAX) {
-      grpc_slice_ref_internal(*(grpc_slice*)(err->arena + slot));
+      grpc_slice_ref_internal(
+          *reinterpret_cast<grpc_slice*>(err->arena + slot));
     }
   }
 }
@@ -370,7 +373,8 @@ static void ref_strs(grpc_error* err) {
 static void ref_errs(grpc_error* err) {
   uint8_t slot = err->first_err;
   while (slot != UINT8_MAX) {
-    grpc_linked_error* lerr = (grpc_linked_error*)(err->arena + slot);
+    grpc_linked_error* lerr =
+        reinterpret_cast<grpc_linked_error*>(err->arena + slot);
     GRPC_ERROR_REF(lerr->err);
     slot = lerr->next;
   }
@@ -399,11 +403,12 @@ static grpc_error* copy_error_and_unref(grpc_error* in) {
     uint8_t new_arena_capacity = in->arena_capacity;
     // the returned err will be added to, so we ensure this is room to avoid
     // unneeded allocations.
-    if (in->arena_capacity - in->arena_size < (uint8_t)SLOTS_PER_STR) {
-      new_arena_capacity = (uint8_t)(3 * new_arena_capacity / 2);
+    if (in->arena_capacity - in->arena_size <
+        static_cast<uint8_t> SLOTS_PER_STR) {
+      new_arena_capacity = static_cast<uint8_t>(3 * new_arena_capacity / 2);
     }
-    out = (grpc_error*)gpr_malloc(sizeof(*in) +
-                                  new_arena_capacity * sizeof(intptr_t));
+    out = static_cast<grpc_error*>(
+        gpr_malloc(sizeof(*in) + new_arena_capacity * sizeof(intptr_t)));
 #ifndef NDEBUG
     if (grpc_trace_error_refcount.enabled()) {
       gpr_log(GPR_DEBUG, "%p create copying %p", out, in);
@@ -487,7 +492,7 @@ bool grpc_error_get_str(grpc_error* err, grpc_error_strs which,
   }
   uint8_t slot = err->strs[which];
   if (slot != UINT8_MAX) {
-    *str = *(grpc_slice*)(err->arena + slot);
+    *str = *reinterpret_cast<grpc_slice*>(err->arena + slot);
     return true;
   } else {
     return false;
@@ -519,7 +524,7 @@ typedef struct {
 static void append_chr(char c, char** s, size_t* sz, size_t* cap) {
   if (*sz == *cap) {
     *cap = GPR_MAX(8, 3 * *cap / 2);
-    *s = (char*)gpr_realloc(*s, *cap);
+    *s = static_cast<char*>(gpr_realloc(*s, *cap));
   }
   (*s)[(*sz)++] = c;
 }
@@ -562,7 +567,7 @@ static void append_esc_str(const uint8_t* str, size_t len, char** s, size_t* sz,
           break;
       }
     } else {
-      append_chr((char)*str, s, sz, cap);
+      append_chr(static_cast<char>(*str), s, sz, cap);
     }
   }
   append_chr('"', s, sz, cap);
@@ -571,8 +576,8 @@ static void append_esc_str(const uint8_t* str, size_t len, char** s, size_t* sz,
 static void append_kv(kv_pairs* kvs, char* key, char* value) {
   if (kvs->num_kvs == kvs->cap_kvs) {
     kvs->cap_kvs = GPR_MAX(3 * kvs->cap_kvs / 2, 4);
-    kvs->kvs =
-        (kv_pair*)gpr_realloc(kvs->kvs, sizeof(*kvs->kvs) * kvs->cap_kvs);
+    kvs->kvs = static_cast<kv_pair*>(
+        gpr_realloc(kvs->kvs, sizeof(*kvs->kvs) * kvs->cap_kvs));
   }
   kvs->kvs[kvs->num_kvs].key = key;
   kvs->kvs[kvs->num_kvs].value = value;
@@ -593,7 +598,7 @@ static void collect_ints_kvs(grpc_error* err, kv_pairs* kvs) {
   for (size_t which = 0; which < GRPC_ERROR_INT_MAX; ++which) {
     uint8_t slot = err->ints[which];
     if (slot != UINT8_MAX) {
-      append_kv(kvs, key_int((grpc_error_ints)which),
+      append_kv(kvs, key_int(static_cast<grpc_error_ints>(which)),
                 fmt_int(err->arena[slot]));
     }
   }
@@ -617,8 +622,8 @@ static void collect_strs_kvs(grpc_error* err, kv_pairs* kvs) {
   for (size_t which = 0; which < GRPC_ERROR_STR_MAX; ++which) {
     uint8_t slot = err->strs[which];
     if (slot != UINT8_MAX) {
-      append_kv(kvs, key_str((grpc_error_strs)which),
-                fmt_str(*(grpc_slice*)(err->arena + slot)));
+      append_kv(kvs, key_str(static_cast<grpc_error_strs>(which)),
+                fmt_str(*reinterpret_cast<grpc_slice*>(err->arena + slot)));
     }
   }
 }
@@ -652,8 +657,8 @@ static void collect_times_kvs(grpc_error* err, kv_pairs* kvs) {
   for (size_t which = 0; which < GRPC_ERROR_TIME_MAX; ++which) {
     uint8_t slot = err->times[which];
     if (slot != UINT8_MAX) {
-      append_kv(kvs, key_time((grpc_error_times)which),
-                fmt_time(*(gpr_timespec*)(err->arena + slot)));
+      append_kv(kvs, key_time(static_cast<grpc_error_times>(which)),
+                fmt_time(*reinterpret_cast<gpr_timespec*>(err->arena + slot)));
     }
   }
 }
@@ -662,7 +667,8 @@ static void add_errs(grpc_error* err, char** s, size_t* sz, size_t* cap) {
   uint8_t slot = err->first_err;
   bool first = true;
   while (slot != UINT8_MAX) {
-    grpc_linked_error* lerr = (grpc_linked_error*)(err->arena + slot);
+    grpc_linked_error* lerr =
+        reinterpret_cast<grpc_linked_error*>(err->arena + slot);
     if (!first) append_chr(',', s, sz, cap);
     first = false;
     const char* e = grpc_error_string(lerr->err);
@@ -685,8 +691,8 @@ static char* errs_string(grpc_error* err) {
 }
 
 static int cmp_kvs(const void* a, const void* b) {
-  const kv_pair* ka = (const kv_pair*)a;
-  const kv_pair* kb = (const kv_pair*)b;
+  const kv_pair* ka = static_cast<const kv_pair*>(a);
+  const kv_pair* kb = static_cast<const kv_pair*>(b);
   return strcmp(ka->key, kb->key);
 }
 
@@ -698,8 +704,8 @@ static char* finish_kvs(kv_pairs* kvs) {
   append_chr('{', &s, &sz, &cap);
   for (size_t i = 0; i < kvs->num_kvs; i++) {
     if (i != 0) append_chr(',', &s, &sz, &cap);
-    append_esc_str((const uint8_t*)kvs->kvs[i].key, strlen(kvs->kvs[i].key), &s,
-                   &sz, &cap);
+    append_esc_str(reinterpret_cast<const uint8_t*>(kvs->kvs[i].key),
+                   strlen(kvs->kvs[i].key), &s, &sz, &cap);
     gpr_free(kvs->kvs[i].key);
     append_chr(':', &s, &sz, &cap);
     append_str(kvs->kvs[i].value, &s, &sz, &cap);
@@ -720,7 +726,7 @@ const char* grpc_error_string(grpc_error* err) {
 
   void* p = (void*)gpr_atm_acq_load(&err->atomics.error_string);
   if (p != nullptr) {
-    return (const char*)p;
+    return static_cast<const char*>(p);
   }
 
   kv_pairs kvs;
diff --git a/src/core/lib/iomgr/ev_epoll1_linux.cc b/src/core/lib/iomgr/ev_epoll1_linux.cc
index a05d74c50a..f84f3f8205 100644
--- a/src/core/lib/iomgr/ev_epoll1_linux.cc
+++ b/src/core/lib/iomgr/ev_epoll1_linux.cc
@@ -281,7 +281,7 @@ static grpc_fd* fd_create(int fd, const char* name) {
   gpr_mu_unlock(&fd_freelist_mu);
 
   if (new_fd == nullptr) {
-    new_fd = (grpc_fd*)gpr_malloc(sizeof(grpc_fd));
+    new_fd = static_cast<grpc_fd*>(gpr_malloc(sizeof(grpc_fd)));
     new_fd->read_closure.Init();
     new_fd->write_closure.Init();
   }
@@ -304,7 +304,7 @@ static grpc_fd* fd_create(int fd, const char* name) {
   gpr_free(fd_name);
 
   struct epoll_event ev;
-  ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
+  ev.events = static_cast<uint32_t>(EPOLLIN | EPOLLOUT | EPOLLET);
   ev.data.ptr = new_fd;
   if (epoll_ctl(g_epoll_set.epfd, EPOLL_CTL_ADD, fd, &ev) != 0) {
     gpr_log(GPR_ERROR, "epoll_ctl failed: %s", strerror(errno));
@@ -440,7 +440,7 @@ static worker_remove_result worker_remove(grpc_pollset* pollset,
 }
 
 static size_t choose_neighborhood(void) {
-  return (size_t)gpr_cpu_current_cpu() % g_num_neighborhoods;
+  return static_cast<size_t>(gpr_cpu_current_cpu()) % g_num_neighborhoods;
 }
 
 static grpc_error* pollset_global_init(void) {
@@ -451,15 +451,15 @@ static grpc_error* pollset_global_init(void) {
   grpc_error* err = grpc_wakeup_fd_init(&global_wakeup_fd);
   if (err != GRPC_ERROR_NONE) return err;
   struct epoll_event ev;
-  ev.events = (uint32_t)(EPOLLIN | EPOLLET);
+  ev.events = static_cast<uint32_t>(EPOLLIN | EPOLLET);
   ev.data.ptr = &global_wakeup_fd;
   if (epoll_ctl(g_epoll_set.epfd, EPOLL_CTL_ADD, global_wakeup_fd.read_fd,
                 &ev) != 0) {
     return GRPC_OS_ERROR(errno, "epoll_ctl");
   }
   g_num_neighborhoods = GPR_CLAMP(gpr_cpu_num_cores(), 1, MAX_NEIGHBORHOODS);
-  g_neighborhoods = (pollset_neighborhood*)gpr_zalloc(sizeof(*g_neighborhoods) *
-                                                      g_num_neighborhoods);
+  g_neighborhoods = static_cast<pollset_neighborhood*>(
+      gpr_zalloc(sizeof(*g_neighborhoods) * g_num_neighborhoods));
   for (size_t i = 0; i < g_num_neighborhoods; i++) {
     gpr_mu_init(&g_neighborhoods[i].mu);
   }
@@ -579,7 +579,7 @@ static int poll_deadline_to_millis_timeout(grpc_millis millis) {
   } else if (delta < 0) {
     return 0;
   } else {
-    return (int)delta;
+    return static_cast<int>(delta);
   }
 }
 
@@ -609,7 +609,7 @@ static grpc_error* process_epoll_events(grpc_pollset* pollset) {
       append_error(&error, grpc_wakeup_fd_consume_wakeup(&global_wakeup_fd),
                    err_desc);
     } else {
-      grpc_fd* fd = (grpc_fd*)(data_ptr);
+      grpc_fd* fd = static_cast<grpc_fd*>(data_ptr);
       bool cancel = (ev->events & (EPOLLERR | EPOLLHUP)) != 0;
       bool read_ev = (ev->events & (EPOLLIN | EPOLLPRI)) != 0;
       bool write_ev = (ev->events & EPOLLOUT) != 0;
@@ -881,7 +881,7 @@ static void end_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
     } else {
       gpr_atm_no_barrier_store(&g_active_poller, 0);
       size_t poller_neighborhood_idx =
-          (size_t)(pollset->neighborhood - g_neighborhoods);
+          static_cast<size_t>(pollset->neighborhood - g_neighborhoods);
       gpr_mu_unlock(&pollset->mu);
       bool found_worker = false;
       bool scan_state[MAX_NEIGHBORHOODS];
@@ -1150,7 +1150,7 @@ static void pollset_add_fd(grpc_pollset* pollset, grpc_fd* fd) {}
  */
 
 static grpc_pollset_set* pollset_set_create(void) {
-  return (grpc_pollset_set*)((intptr_t)0xdeafbeef);
+  return (grpc_pollset_set*)(static_cast<intptr_t>(0xdeafbeef));
 }
 
 static void pollset_set_destroy(grpc_pollset_set* pss) {}
diff --git a/src/core/lib/iomgr/ev_epollex_linux.cc b/src/core/lib/iomgr/ev_epollex_linux.cc
index 000faed1d9..8bce34b2fd 100644
--- a/src/core/lib/iomgr/ev_epollex_linux.cc
+++ b/src/core/lib/iomgr/ev_epollex_linux.cc
@@ -276,7 +276,7 @@ static void ref_by(grpc_fd* fd, int n) {
 }
 
 static void fd_destroy(void* arg, grpc_error* error) {
-  grpc_fd* fd = (grpc_fd*)arg;
+  grpc_fd* fd = static_cast<grpc_fd*>(arg);
   /* Add the fd to the freelist */
   grpc_iomgr_unregister_object(&fd->iomgr_object);
   POLLABLE_UNREF(fd->pollable_obj, "fd_pollable");
@@ -338,7 +338,7 @@ static grpc_fd* fd_create(int fd, const char* name) {
   gpr_mu_unlock(&fd_freelist_mu);
 
   if (new_fd == nullptr) {
-    new_fd = (grpc_fd*)gpr_malloc(sizeof(grpc_fd));
+    new_fd = static_cast<grpc_fd*>(gpr_malloc(sizeof(grpc_fd)));
     new_fd->read_closure.Init();
     new_fd->write_closure.Init();
   }
@@ -441,7 +441,7 @@ static grpc_error* pollable_create(pollable_type type, pollable** p) {
   if (epfd == -1) {
     return GRPC_OS_ERROR(errno, "epoll_create1");
   }
-  *p = (pollable*)gpr_malloc(sizeof(**p));
+  *p = static_cast<pollable*>(gpr_malloc(sizeof(**p)));
   grpc_error* err = grpc_wakeup_fd_init(&(*p)->wakeup);
   if (err != GRPC_ERROR_NONE) {
     close(epfd);
@@ -450,7 +450,7 @@ static grpc_error* pollable_create(pollable_type type, pollable** p) {
     return err;
   }
   struct epoll_event ev;
-  ev.events = (uint32_t)(EPOLLIN | EPOLLET);
+  ev.events = static_cast<uint32_t>(EPOLLIN | EPOLLET);
   ev.data.ptr = (void*)(1 | (intptr_t) & (*p)->wakeup);
   if (epoll_ctl(epfd, EPOLL_CTL_ADD, (*p)->wakeup.read_fd, &ev) != 0) {
     err = GRPC_OS_ERROR(errno, "epoll_ctl");
@@ -479,7 +479,7 @@ static pollable* pollable_ref(pollable* p) {
 #else
 static pollable* pollable_ref(pollable* p, int line, const char* reason) {
   if (grpc_trace_pollable_refcount.enabled()) {
-    int r = (int)gpr_atm_no_barrier_load(&p->refs.count);
+    int r = static_cast<int> gpr_atm_no_barrier_load(&p->refs.count);
     gpr_log(__FILE__, line, GPR_LOG_SEVERITY_DEBUG,
             "POLLABLE:%p   ref %d->%d %s", p, r, r + 1, reason);
   }
@@ -494,7 +494,7 @@ static void pollable_unref(pollable* p) {
 static void pollable_unref(pollable* p, int line, const char* reason) {
   if (p == nullptr) return;
   if (grpc_trace_pollable_refcount.enabled()) {
-    int r = (int)gpr_atm_no_barrier_load(&p->refs.count);
+    int r = static_cast<int> gpr_atm_no_barrier_load(&p->refs.count);
     gpr_log(__FILE__, line, GPR_LOG_SEVERITY_DEBUG,
             "POLLABLE:%p unref %d->%d %s", p, r, r - 1, reason);
   }
@@ -516,7 +516,8 @@ static grpc_error* pollable_add_fd(pollable* p, grpc_fd* fd) {
   }
 
   struct epoll_event ev_fd;
-  ev_fd.events = (uint32_t)(EPOLLET | EPOLLIN | EPOLLOUT | EPOLLEXCLUSIVE);
+  ev_fd.events =
+      static_cast<uint32_t>(EPOLLET | EPOLLIN | EPOLLOUT | EPOLLEXCLUSIVE);
   ev_fd.data.ptr = fd;
   if (epoll_ctl(epfd, EPOLL_CTL_ADD, fd->fd, &ev_fd) != 0) {
     switch (errno) {
@@ -699,7 +700,7 @@ static int poll_deadline_to_millis_timeout(grpc_millis millis) {
   else if (delta < 0)
     return 0;
   else
-    return (int)delta;
+    return static_cast<int>(delta);
 }
 
 static void fd_become_readable(grpc_fd* fd, grpc_pollset* notifier) {
@@ -768,10 +769,11 @@ static grpc_error* pollable_process_events(grpc_pollset* pollset,
       }
       append_error(&error,
                    grpc_wakeup_fd_consume_wakeup(
-                       (grpc_wakeup_fd*)((~(intptr_t)1) & (intptr_t)data_ptr)),
+                       (grpc_wakeup_fd*)((~static_cast<intptr_t>(1)) &
+                                         (intptr_t)data_ptr)),
                    err_desc);
     } else {
-      grpc_fd* fd = (grpc_fd*)data_ptr;
+      grpc_fd* fd = static_cast<grpc_fd*>(data_ptr);
       bool cancel = (ev->events & (EPOLLERR | EPOLLHUP)) != 0;
       bool read_ev = (ev->events & (EPOLLIN | EPOLLPRI)) != 0;
       bool write_ev = (ev->events & EPOLLOUT) != 0;
@@ -1170,7 +1172,8 @@ static grpc_pollset_set* pss_lock_adam(grpc_pollset_set* pss) {
 }
 
 static grpc_pollset_set* pollset_set_create(void) {
-  grpc_pollset_set* pss = (grpc_pollset_set*)gpr_zalloc(sizeof(*pss));
+  grpc_pollset_set* pss =
+      static_cast<grpc_pollset_set*>(gpr_zalloc(sizeof(*pss)));
   gpr_mu_init(&pss->mu);
   gpr_ref_init(&pss->refs, 1);
   return pss;
@@ -1210,8 +1213,8 @@ static void pollset_set_add_fd(grpc_pollset_set* pss, grpc_fd* fd) {
   }
   if (pss->fd_count == pss->fd_capacity) {
     pss->fd_capacity = GPR_MAX(pss->fd_capacity * 2, 8);
-    pss->fds =
-        (grpc_fd**)gpr_realloc(pss->fds, pss->fd_capacity * sizeof(*pss->fds));
+    pss->fds = static_cast<grpc_fd**>(
+        gpr_realloc(pss->fds, pss->fd_capacity * sizeof(*pss->fds)));
   }
   REF_BY(fd, 2, "pollset_set");
   pss->fds[pss->fd_count++] = fd;
@@ -1319,8 +1322,8 @@ static void pollset_set_add_pollset(grpc_pollset_set* pss, grpc_pollset* ps) {
                err_desc);
   if (pss->pollset_count == pss->pollset_capacity) {
     pss->pollset_capacity = GPR_MAX(pss->pollset_capacity * 2, 8);
-    pss->pollsets = (grpc_pollset**)gpr_realloc(
-        pss->pollsets, pss->pollset_capacity * sizeof(*pss->pollsets));
+    pss->pollsets = static_cast<grpc_pollset**>(gpr_realloc(
+        pss->pollsets, pss->pollset_capacity * sizeof(*pss->pollsets)));
   }
   pss->pollsets[pss->pollset_count++] = ps;
   gpr_mu_unlock(&pss->mu);
@@ -1373,7 +1376,8 @@ static void pollset_set_add_pollset_set(grpc_pollset_set* a,
   b->parent = a;
   if (a->fd_capacity < a->fd_count + b->fd_count) {
     a->fd_capacity = GPR_MAX(2 * a->fd_capacity, a->fd_count + b->fd_count);
-    a->fds = (grpc_fd**)gpr_realloc(a->fds, a->fd_capacity * sizeof(*a->fds));
+    a->fds = static_cast<grpc_fd**>(
+        gpr_realloc(a->fds, a->fd_capacity * sizeof(*a->fds)));
   }
   size_t initial_a_fd_count = a->fd_count;
   a->fd_count = 0;
@@ -1390,8 +1394,8 @@ static void pollset_set_add_pollset_set(grpc_pollset_set* a,
   if (a->pollset_capacity < a->pollset_count + b->pollset_count) {
     a->pollset_capacity =
         GPR_MAX(2 * a->pollset_capacity, a->pollset_count + b->pollset_count);
-    a->pollsets = (grpc_pollset**)gpr_realloc(
-        a->pollsets, a->pollset_capacity * sizeof(*a->pollsets));
+    a->pollsets = static_cast<grpc_pollset**>(
+        gpr_realloc(a->pollsets, a->pollset_capacity * sizeof(*a->pollsets)));
   }
   if (b->pollset_count > 0) {
     memcpy(a->pollsets + a->pollset_count, b->pollsets,
diff --git a/src/core/lib/iomgr/ev_epollsig_linux.cc b/src/core/lib/iomgr/ev_epollsig_linux.cc
index 4c26bbd2c6..5c99c72aa5 100644
--- a/src/core/lib/iomgr/ev_epollsig_linux.cc
+++ b/src/core/lib/iomgr/ev_epollsig_linux.cc
@@ -349,7 +349,7 @@ static void polling_island_add_fds_locked(polling_island* pi, grpc_fd** fds,
 #endif /* defined(GRPC_TSAN) */
 
   for (i = 0; i < fd_count; i++) {
-    ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
+    ev.events = static_cast<uint32_t>(EPOLLIN | EPOLLOUT | EPOLLET);
     ev.data.ptr = fds[i];
     err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_ADD, fds[i]->fd, &ev);
 
@@ -368,8 +368,8 @@ static void polling_island_add_fds_locked(polling_island* pi, grpc_fd** fds,
 
     if (pi->fd_cnt == pi->fd_capacity) {
       pi->fd_capacity = GPR_MAX(pi->fd_capacity + 8, pi->fd_cnt * 3 / 2);
-      pi->fds =
-          (grpc_fd**)gpr_realloc(pi->fds, sizeof(grpc_fd*) * pi->fd_capacity);
+      pi->fds = static_cast<grpc_fd**>(
+          gpr_realloc(pi->fds, sizeof(grpc_fd*) * pi->fd_capacity));
     }
 
     pi->fds[pi->fd_cnt++] = fds[i];
@@ -388,7 +388,7 @@ static void polling_island_add_wakeup_fd_locked(polling_island* pi,
   char* err_msg;
   const char* err_desc = "polling_island_add_wakeup_fd";
 
-  ev.events = (uint32_t)(EPOLLIN | EPOLLET);
+  ev.events = static_cast<uint32_t>(EPOLLIN | EPOLLET);
   ev.data.ptr = wakeup_fd;
   err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_ADD,
                   GRPC_WAKEUP_FD_GET_READ_FD(wakeup_fd), &ev);
@@ -471,7 +471,7 @@ static polling_island* polling_island_create(grpc_fd* initial_fd,
 
   *error = GRPC_ERROR_NONE;
 
-  pi = (polling_island*)gpr_malloc(sizeof(*pi));
+  pi = static_cast<polling_island*>(gpr_malloc(sizeof(*pi)));
   gpr_mu_init(&pi->mu);
   pi->fd_cnt = 0;
   pi->fd_capacity = 0;
@@ -815,7 +815,7 @@ static grpc_fd* fd_create(int fd, const char* name) {
   gpr_mu_unlock(&fd_freelist_mu);
 
   if (new_fd == nullptr) {
-    new_fd = (grpc_fd*)gpr_malloc(sizeof(grpc_fd));
+    new_fd = static_cast<grpc_fd*>(gpr_malloc(sizeof(grpc_fd)));
     gpr_mu_init(&new_fd->po.mu);
     new_fd->read_closure.Init();
     new_fd->write_closure.Init();
@@ -976,7 +976,8 @@ static grpc_error* pollset_worker_kick(grpc_pollset_worker* worker) {
   grpc_error* err = GRPC_ERROR_NONE;
 
   /* Kick the worker only if it was not already kicked */
-  if (gpr_atm_no_barrier_cas(&worker->is_kicked, (gpr_atm)0, (gpr_atm)1)) {
+  if (gpr_atm_no_barrier_cas(&worker->is_kicked, static_cast<gpr_atm>(0),
+                             static_cast<gpr_atm>(1))) {
     GRPC_POLLING_TRACE(
         "pollset_worker_kick: Kicking worker: %p (thread id: %ld)",
         (void*)worker, (long int)worker->pt_id);
@@ -1096,7 +1097,7 @@ static int poll_deadline_to_millis_timeout(grpc_millis millis) {
   else if (delta < 0)
     return 0;
   else
-    return (int)delta;
+    return static_cast<int>(delta);
 }
 
 static void fd_become_readable(grpc_fd* fd, grpc_pollset* notifier) {
@@ -1251,7 +1252,7 @@ static void pollset_work_and_unlock(grpc_pollset* pollset,
          to the function pollset_work_and_unlock() will pick up the correct
          epoll_fd */
     } else {
-      grpc_fd* fd = (grpc_fd*)data_ptr;
+      grpc_fd* fd = static_cast<grpc_fd*>(data_ptr);
       int cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
       int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
       int write_ev = ep_ev[i].events & EPOLLOUT;
@@ -1538,7 +1539,8 @@ static void pollset_add_fd(grpc_pollset* pollset, grpc_fd* fd) {
  */
 
 static grpc_pollset_set* pollset_set_create(void) {
-  grpc_pollset_set* pss = (grpc_pollset_set*)gpr_malloc(sizeof(*pss));
+  grpc_pollset_set* pss =
+      static_cast<grpc_pollset_set*>(gpr_malloc(sizeof(*pss)));
   gpr_mu_init(&pss->po.mu);
   pss->po.pi = nullptr;
 #ifndef NDEBUG
@@ -1607,8 +1609,8 @@ void* grpc_pollset_get_polling_island(grpc_pollset* ps) {
 }
 
 bool grpc_are_polling_islands_equal(void* p, void* q) {
-  polling_island* p1 = (polling_island*)p;
-  polling_island* p2 = (polling_island*)q;
+  polling_island* p1 = static_cast<polling_island*>(p);
+  polling_island* p2 = static_cast<polling_island*>(q);
 
   /* Note: polling_island_lock_pair() may change p1 and p2 to point to the
      latest polling islands in their respective linked lists */
diff --git a/src/core/lib/iomgr/ev_poll_posix.cc b/src/core/lib/iomgr/ev_poll_posix.cc
index 9833b47bd3..e92163322f 100644
--- a/src/core/lib/iomgr/ev_poll_posix.cc
+++ b/src/core/lib/iomgr/ev_poll_posix.cc
@@ -323,7 +323,7 @@ static void unref_by(grpc_fd* fd, int n) {
 }
 
 static grpc_fd* fd_create(int fd, const char* name) {
-  grpc_fd* r = (grpc_fd*)gpr_malloc(sizeof(*r));
+  grpc_fd* r = static_cast<grpc_fd*>(gpr_malloc(sizeof(*r)));
   gpr_mu_init(&r->mu);
   gpr_atm_rel_store(&r->refst, 1);
   r->shutdown = 0;
@@ -835,8 +835,8 @@ static void pollset_add_fd(grpc_pollset* pollset, grpc_fd* fd) {
   if (pollset->fd_count == pollset->fd_capacity) {
     pollset->fd_capacity =
         GPR_MAX(pollset->fd_capacity + 8, pollset->fd_count * 3 / 2);
-    pollset->fds = (grpc_fd**)gpr_realloc(
-        pollset->fds, sizeof(grpc_fd*) * pollset->fd_capacity);
+    pollset->fds = static_cast<grpc_fd**>(
+        gpr_realloc(pollset->fds, sizeof(grpc_fd*) * pollset->fd_capacity));
   }
   pollset->fds[pollset->fd_count++] = fd;
   GRPC_FD_REF(fd, "multipoller");
@@ -889,8 +889,8 @@ static grpc_error* pollset_work(grpc_pollset* pollset,
     worker.wakeup_fd = pollset->local_wakeup_cache;
     pollset->local_wakeup_cache = worker.wakeup_fd->next;
   } else {
-    worker.wakeup_fd =
-        (grpc_cached_wakeup_fd*)gpr_malloc(sizeof(*worker.wakeup_fd));
+    worker.wakeup_fd = static_cast<grpc_cached_wakeup_fd*>(
+        gpr_malloc(sizeof(*worker.wakeup_fd)));
     error = grpc_wakeup_fd_init(&worker.wakeup_fd->fd);
     if (error != GRPC_ERROR_NONE) {
       GRPC_LOG_IF_ERROR("pollset_work", GRPC_ERROR_REF(error));
@@ -945,8 +945,9 @@ static grpc_error* pollset_work(grpc_pollset* pollset,
         const size_t pfd_size = sizeof(*pfds) * (pollset->fd_count + 2);
         const size_t watch_size = sizeof(*watchers) * (pollset->fd_count + 2);
         void* buf = gpr_malloc(pfd_size + watch_size);
-        pfds = (struct pollfd*)buf;
-        watchers = (grpc_fd_watcher*)(void*)((char*)buf + pfd_size);
+        pfds = static_cast<struct pollfd*>(buf);
+        watchers = static_cast<grpc_fd_watcher*>(
+            (void*)(static_cast<char*>(buf) + pfd_size));
       }
 
       fd_count = 0;
@@ -972,8 +973,8 @@ static grpc_error* pollset_work(grpc_pollset* pollset,
 
       for (i = 1; i < pfd_count; i++) {
         grpc_fd* fd = watchers[i].fd;
-        pfds[i].events = (short)fd_begin_poll(fd, pollset, &worker, POLLIN,
-                                              POLLOUT, &watchers[i]);
+        pfds[i].events = static_cast<short>(
+            fd_begin_poll(fd, pollset, &worker, POLLIN, POLLOUT, &watchers[i]));
         GRPC_FD_UNREF(fd, "multipoller_start");
       }
 
@@ -1123,7 +1124,7 @@ static int poll_deadline_to_millis_timeout(grpc_millis deadline) {
   grpc_millis n = deadline - grpc_core::ExecCtx::Get()->Now();
   if (n < 0) return 0;
   if (n > INT_MAX) return -1;
-  return (int)n;
+  return static_cast<int>(n);
 }
 
 /*******************************************************************************
@@ -1132,7 +1133,7 @@ static int poll_deadline_to_millis_timeout(grpc_millis deadline) {
 
 static grpc_pollset_set* pollset_set_create(void) {
   grpc_pollset_set* pollset_set =
-      (grpc_pollset_set*)gpr_zalloc(sizeof(*pollset_set));
+      static_cast<grpc_pollset_set*>(gpr_zalloc(sizeof(*pollset_set)));
   gpr_mu_init(&pollset_set->mu);
   return pollset_set;
 }
@@ -1173,9 +1174,9 @@ static void pollset_set_add_pollset(grpc_pollset_set* pollset_set,
   if (pollset_set->pollset_count == pollset_set->pollset_capacity) {
     pollset_set->pollset_capacity =
         GPR_MAX(8, 2 * pollset_set->pollset_capacity);
-    pollset_set->pollsets = (grpc_pollset**)gpr_realloc(
+    pollset_set->pollsets = static_cast<grpc_pollset**>(gpr_realloc(
         pollset_set->pollsets,
-        pollset_set->pollset_capacity * sizeof(*pollset_set->pollsets));
+        pollset_set->pollset_capacity * sizeof(*pollset_set->pollsets)));
   }
   pollset_set->pollsets[pollset_set->pollset_count++] = pollset;
   for (i = 0, j = 0; i < pollset_set->fd_count; i++) {
@@ -1222,9 +1223,9 @@ static void pollset_set_add_pollset_set(grpc_pollset_set* bag,
   gpr_mu_lock(&bag->mu);
   if (bag->pollset_set_count == bag->pollset_set_capacity) {
     bag->pollset_set_capacity = GPR_MAX(8, 2 * bag->pollset_set_capacity);
-    bag->pollset_sets = (grpc_pollset_set**)gpr_realloc(
-        bag->pollset_sets,
-        bag->pollset_set_capacity * sizeof(*bag->pollset_sets));
+    bag->pollset_sets = static_cast<grpc_pollset_set**>(
+        gpr_realloc(bag->pollset_sets,
+                    bag->pollset_set_capacity * sizeof(*bag->pollset_sets)));
   }
   bag->pollset_sets[bag->pollset_set_count++] = item;
   for (i = 0, j = 0; i < bag->fd_count; i++) {
@@ -1259,8 +1260,9 @@ static void pollset_set_add_fd(grpc_pollset_set* pollset_set, grpc_fd* fd) {
   gpr_mu_lock(&pollset_set->mu);
   if (pollset_set->fd_count == pollset_set->fd_capacity) {
     pollset_set->fd_capacity = GPR_MAX(8, 2 * pollset_set->fd_capacity);
-    pollset_set->fds = (grpc_fd**)gpr_realloc(
-        pollset_set->fds, pollset_set->fd_capacity * sizeof(*pollset_set->fds));
+    pollset_set->fds = static_cast<grpc_fd**>(
+        gpr_realloc(pollset_set->fds,
+                    pollset_set->fd_capacity * sizeof(*pollset_set->fds)));
   }
   GRPC_FD_REF(fd, "pollset_set");
   pollset_set->fds[pollset_set->fd_count++] = fd;
@@ -1312,12 +1314,12 @@ static void cache_insert_locked(poll_args* args) {
 }
 
 static void init_result(poll_args* pargs) {
-  pargs->result = (poll_result*)gpr_malloc(sizeof(poll_result));
+  pargs->result = static_cast<poll_result*>(gpr_malloc(sizeof(poll_result)));
   gpr_ref_init(&pargs->result->refcount, 1);
   pargs->result->watchers = nullptr;
   pargs->result->watchcount = 0;
-  pargs->result->fds =
-      (struct pollfd*)gpr_malloc(sizeof(struct pollfd) * pargs->nfds);
+  pargs->result->fds = static_cast<struct pollfd*>(
+      gpr_malloc(sizeof(struct pollfd) * pargs->nfds));
   memcpy(pargs->result->fds, pargs->fds, sizeof(struct pollfd) * pargs->nfds);
   pargs->result->nfds = pargs->nfds;
   pargs->result->retval = 0;
@@ -1356,7 +1358,8 @@ static poll_args* get_poller_locked(struct pollfd* fds, nfds_t count) {
     return pargs;
   }
 
-  poll_args* pargs = (poll_args*)gpr_malloc(sizeof(struct poll_args));
+  poll_args* pargs =
+      static_cast<poll_args*>(gpr_malloc(sizeof(struct poll_args)));
   gpr_cv_init(&pargs->trigger);
   pargs->fds = fds;
   pargs->nfds = count;
@@ -1404,7 +1407,7 @@ static void cache_poller_locked(poll_args* args) {
     poll_cache.size = poll_cache.size * 2;
     poll_cache.count = 0;
     poll_cache.active_pollers =
-        (poll_args**)gpr_malloc(sizeof(void*) * poll_cache.size);
+        static_cast<poll_args**>(gpr_malloc(sizeof(void*) * poll_cache.size));
     for (unsigned int i = 0; i < poll_cache.size; i++) {
       poll_cache.active_pollers[i] = nullptr;
     }
@@ -1461,7 +1464,7 @@ gpr_timespec thread_grace;
 
 // Poll in a background thread
 static void run_poll(void* args) {
-  poll_args* pargs = (poll_args*)args;
+  poll_args* pargs = static_cast<poll_args*>(args);
   while (1) {
     poll_result* result = pargs->result;
     int retval = g_cvfds.poll(result->fds, result->nfds, CV_POLL_PERIOD_MS);
@@ -1509,12 +1512,13 @@ static int cvfd_poll(struct pollfd* fds, nfds_t nfds, int timeout) {
   nfds_t nsockfds = 0;
   poll_result* result = nullptr;
   gpr_mu_lock(&g_cvfds.mu);
-  pollcv = (grpc_cv_node*)gpr_malloc(sizeof(grpc_cv_node));
+  pollcv = static_cast<grpc_cv_node*>(gpr_malloc(sizeof(grpc_cv_node)));
   pollcv->next = nullptr;
   gpr_cv pollcv_cv;
   gpr_cv_init(&pollcv_cv);
   pollcv->cv = &pollcv_cv;
-  grpc_cv_node* fd_cvs = (grpc_cv_node*)gpr_malloc(nfds * sizeof(grpc_cv_node));
+  grpc_cv_node* fd_cvs =
+      static_cast<grpc_cv_node*>(gpr_malloc(nfds * sizeof(grpc_cv_node)));
 
   for (i = 0; i < nfds; i++) {
     fds[i].revents = 0;
@@ -1546,8 +1550,8 @@ static int cvfd_poll(struct pollfd* fds, nfds_t nfds, int timeout) {
 
   res = 0;
   if (!skip_poll && nsockfds > 0) {
-    struct pollfd* pollfds =
-        (struct pollfd*)gpr_malloc(sizeof(struct pollfd) * nsockfds);
+    struct pollfd* pollfds = static_cast<struct pollfd*>(
+        gpr_malloc(sizeof(struct pollfd) * nsockfds));
     idx = 0;
     for (i = 0; i < nfds; i++) {
       if (fds[i].fd >= 0) {
@@ -1610,8 +1614,8 @@ static void global_cv_fd_table_init() {
   gpr_cv_init(&g_cvfds.shutdown_cv);
   gpr_ref_init(&g_cvfds.pollcount, 1);
   g_cvfds.size = CV_DEFAULT_TABLE_SIZE;
-  g_cvfds.cvfds =
-      (grpc_fd_node*)gpr_malloc(sizeof(grpc_fd_node) * CV_DEFAULT_TABLE_SIZE);
+  g_cvfds.cvfds = static_cast<grpc_fd_node*>(
+      gpr_malloc(sizeof(grpc_fd_node) * CV_DEFAULT_TABLE_SIZE));
   g_cvfds.free_fds = nullptr;
   thread_grace = gpr_time_from_millis(POLLCV_THREAD_GRACE_MS, GPR_TIMESPAN);
   for (int i = 0; i < CV_DEFAULT_TABLE_SIZE; i++) {
@@ -1628,7 +1632,8 @@ static void global_cv_fd_table_init() {
   poll_cache.size = 32;
   poll_cache.count = 0;
   poll_cache.free_pollers = nullptr;
-  poll_cache.active_pollers = (poll_args**)gpr_malloc(sizeof(void*) * 32);
+  poll_cache.active_pollers =
+      static_cast<poll_args**>(gpr_malloc(sizeof(void*) * 32));
   for (unsigned int i = 0; i < poll_cache.size; i++) {
     poll_cache.active_pollers[i] = nullptr;
   }
diff --git a/src/core/lib/iomgr/ev_posix.cc b/src/core/lib/iomgr/ev_posix.cc
index af5dfe5bf3..4280794428 100644
--- a/src/core/lib/iomgr/ev_posix.cc
+++ b/src/core/lib/iomgr/ev_posix.cc
@@ -108,11 +108,11 @@ static void add(const char* beg, const char* end, char*** ss, size_t* ns) {
   char* s;
   size_t len;
   GPR_ASSERT(end >= beg);
-  len = (size_t)(end - beg);
-  s = (char*)gpr_malloc(len + 1);
+  len = static_cast<size_t>(end - beg);
+  s = static_cast<char*>(gpr_malloc(len + 1));
   memcpy(s, beg, len);
   s[len] = 0;
-  *ss = (char**)gpr_realloc(*ss, sizeof(char**) * np);
+  *ss = static_cast<char**>(gpr_realloc(*ss, sizeof(char**) * np));
   (*ss)[n] = s;
   *ns = np;
 }
diff --git a/src/core/lib/iomgr/exec_ctx.cc b/src/core/lib/iomgr/exec_ctx.cc
index 03c833ff07..5401a94dd3 100644
--- a/src/core/lib/iomgr/exec_ctx.cc
+++ b/src/core/lib/iomgr/exec_ctx.cc
@@ -53,21 +53,22 @@ static gpr_timespec g_start_time;
 
 static gpr_atm timespec_to_atm_round_down(gpr_timespec ts) {
   ts = gpr_time_sub(ts, g_start_time);
-  double x =
-      GPR_MS_PER_SEC * (double)ts.tv_sec + (double)ts.tv_nsec / GPR_NS_PER_MS;
+  double x = GPR_MS_PER_SEC * static_cast<double>(ts.tv_sec) +
+             static_cast<double>(ts.tv_nsec) / GPR_NS_PER_MS;
   if (x < 0) return 0;
   if (x > GPR_ATM_MAX) return GPR_ATM_MAX;
-  return (gpr_atm)x;
+  return static_cast<gpr_atm>(x);
 }
 
 static gpr_atm timespec_to_atm_round_up(gpr_timespec ts) {
   ts = gpr_time_sub(ts, g_start_time);
-  double x = GPR_MS_PER_SEC * (double)ts.tv_sec +
-             (double)ts.tv_nsec / GPR_NS_PER_MS +
-             (double)(GPR_NS_PER_SEC - 1) / (double)GPR_NS_PER_SEC;
+  double x = GPR_MS_PER_SEC * static_cast<double>(ts.tv_sec) +
+             static_cast<double>(ts.tv_nsec) / GPR_NS_PER_MS +
+             static_cast<double>(GPR_NS_PER_SEC - 1) /
+                 static_cast<double>(GPR_NS_PER_SEC);
   if (x < 0) return 0;
   if (x > GPR_ATM_MAX) return GPR_ATM_MAX;
-  return (gpr_atm)x;
+  return static_cast<gpr_atm>(x);
 }
 
 gpr_timespec grpc_millis_to_timespec(grpc_millis millis,
diff --git a/src/core/lib/iomgr/executor.cc b/src/core/lib/iomgr/executor.cc
index 3288ea3de5..7ab987c19e 100644
--- a/src/core/lib/iomgr/executor.cc
+++ b/src/core/lib/iomgr/executor.cc
@@ -94,8 +94,8 @@ void grpc_executor_set_threading(bool threading) {
     g_max_threads = GPR_MAX(1, 2 * gpr_cpu_num_cores());
     gpr_atm_no_barrier_store(&g_cur_threads, 1);
     gpr_tls_init(&g_this_thread_state);
-    g_thread_state =
-        (thread_state*)gpr_zalloc(sizeof(thread_state) * g_max_threads);
+    g_thread_state = static_cast<thread_state*>(
+        gpr_zalloc(sizeof(thread_state) * g_max_threads));
     for (size_t i = 0; i < g_max_threads; i++) {
       gpr_mu_init(&g_thread_state[i].mu);
       gpr_cv_init(&g_thread_state[i].cv);
@@ -140,7 +140,7 @@ void grpc_executor_init() {
 void grpc_executor_shutdown() { grpc_executor_set_threading(false); }
 
 static void executor_thread(void* arg) {
-  thread_state* ts = (thread_state*)arg;
+  thread_state* ts = static_cast<thread_state*>(arg);
   gpr_tls_set(&g_this_thread_state, (intptr_t)ts);
 
   grpc_core::ExecCtx exec_ctx(0);
@@ -149,7 +149,7 @@ static void executor_thread(void* arg) {
   for (;;) {
     if (executor_trace.enabled()) {
       gpr_log(GPR_DEBUG, "EXECUTOR[%d]: step (sub_depth=%" PRIdPTR ")",
-              (int)(ts - g_thread_state), subtract_depth);
+              static_cast<int>(ts - g_thread_state), subtract_depth);
     }
     gpr_mu_lock(&ts->mu);
     ts->depth -= subtract_depth;
@@ -160,7 +160,7 @@ static void executor_thread(void* arg) {
     if (ts->shutdown) {
       if (executor_trace.enabled()) {
         gpr_log(GPR_DEBUG, "EXECUTOR[%d]: shutdown",
-                (int)(ts - g_thread_state));
+                static_cast<int>(ts - g_thread_state));
       }
       gpr_mu_unlock(&ts->mu);
       break;
@@ -170,7 +170,8 @@ static void executor_thread(void* arg) {
     ts->elems = GRPC_CLOSURE_LIST_INIT;
     gpr_mu_unlock(&ts->mu);
     if (executor_trace.enabled()) {
-      gpr_log(GPR_DEBUG, "EXECUTOR[%d]: execute", (int)(ts - g_thread_state));
+      gpr_log(GPR_DEBUG, "EXECUTOR[%d]: execute",
+              static_cast<int>(ts - g_thread_state));
     }
 
     grpc_core::ExecCtx::Get()->InvalidateNow();
@@ -188,7 +189,8 @@ static void executor_push(grpc_closure* closure, grpc_error* error,
   }
   do {
     retry_push = false;
-    size_t cur_thread_count = (size_t)gpr_atm_no_barrier_load(&g_cur_threads);
+    size_t cur_thread_count =
+        static_cast<size_t>(gpr_atm_no_barrier_load(&g_cur_threads));
     if (cur_thread_count == 0) {
       if (executor_trace.enabled()) {
 #ifndef NDEBUG
@@ -219,7 +221,7 @@ static void executor_push(grpc_closure* closure, grpc_error* error,
             GPR_DEBUG,
             "EXECUTOR: try to schedule %p (%s) (created %s:%d) to thread %d",
             closure, is_short ? "short" : "long", closure->file_created,
-            closure->line_created, (int)(ts - g_thread_state));
+            closure->line_created, static_cast<int>(ts - g_thread_state));
 #else
         gpr_log(GPR_DEBUG, "EXECUTOR: try to schedule %p (%s) to thread %d",
                 closure, is_short ? "short" : "long",
@@ -233,7 +235,7 @@ static void executor_push(grpc_closure* closure, grpc_error* error,
         // guarantee no starvation)
         // ... spin through queues and try again
         gpr_mu_unlock(&ts->mu);
-        size_t idx = (size_t)(ts - g_thread_state);
+        size_t idx = static_cast<size_t>(ts - g_thread_state);
         ts = &g_thread_state[(idx + 1) % cur_thread_count];
         if (ts == orig_ts) {
           retry_push = true;
@@ -255,7 +257,8 @@ static void executor_push(grpc_closure* closure, grpc_error* error,
       break;
     }
     if (try_new_thread && gpr_spinlock_trylock(&g_adding_thread_lock)) {
-      cur_thread_count = (size_t)gpr_atm_no_barrier_load(&g_cur_threads);
+      cur_thread_count =
+          static_cast<size_t>(gpr_atm_no_barrier_load(&g_cur_threads));
       if (cur_thread_count < g_max_threads) {
         gpr_atm_no_barrier_store(&g_cur_threads, cur_thread_count + 1);
 
diff --git a/src/core/lib/iomgr/gethostname_host_name_max.cc b/src/core/lib/iomgr/gethostname_host_name_max.cc
index 2487160916..ae95788a1e 100644
--- a/src/core/lib/iomgr/gethostname_host_name_max.cc
+++ b/src/core/lib/iomgr/gethostname_host_name_max.cc
@@ -27,7 +27,7 @@
 #include <grpc/support/alloc.h>
 
 char* grpc_gethostname() {
-  char* hostname = (char*)gpr_malloc(HOST_NAME_MAX);
+  char* hostname = static_cast<char*>(gpr_malloc(HOST_NAME_MAX));
   if (gethostname(hostname, HOST_NAME_MAX) != 0) {
     gpr_free(hostname);
     return nullptr;
diff --git a/src/core/lib/iomgr/is_epollexclusive_available.cc b/src/core/lib/iomgr/is_epollexclusive_available.cc
index 08f9cf2b69..542cc41e8f 100644
--- a/src/core/lib/iomgr/is_epollexclusive_available.cc
+++ b/src/core/lib/iomgr/is_epollexclusive_available.cc
@@ -61,7 +61,8 @@ bool grpc_is_epollexclusive_available(void) {
   /* choose events that should cause an error on
      EPOLLEXCLUSIVE enabled kernels - specifically the combination of
      EPOLLONESHOT and EPOLLEXCLUSIVE */
-  ev.events = (uint32_t)(EPOLLET | EPOLLIN | EPOLLEXCLUSIVE | EPOLLONESHOT);
+  ev.events =
+      static_cast<uint32_t>(EPOLLET | EPOLLIN | EPOLLEXCLUSIVE | EPOLLONESHOT);
   ev.data.ptr = nullptr;
   if (epoll_ctl(fd, EPOLL_CTL_ADD, evfd, &ev) != 0) {
     if (errno != EINVAL) {
diff --git a/src/core/lib/iomgr/load_file.cc b/src/core/lib/iomgr/load_file.cc
index b6586fbc73..7f5f642c98 100644
--- a/src/core/lib/iomgr/load_file.cc
+++ b/src/core/lib/iomgr/load_file.cc
@@ -45,10 +45,10 @@ grpc_error* grpc_load_file(const char* filename, int add_null_terminator,
   }
   fseek(file, 0, SEEK_END);
   /* Converting to size_t on the assumption that it will not fail */
-  contents_size = (size_t)ftell(file);
+  contents_size = static_cast<size_t>(ftell(file));
   fseek(file, 0, SEEK_SET);
-  contents =
-      (unsigned char*)gpr_malloc(contents_size + (add_null_terminator ? 1 : 0));
+  contents = static_cast<unsigned char*>(
+      gpr_malloc(contents_size + (add_null_terminator ? 1 : 0)));
   bytes_read = fread(contents, 1, contents_size, file);
   if (bytes_read < contents_size) {
     error = GRPC_OS_ERROR(errno, "fread");
diff --git a/src/core/lib/iomgr/resolve_address_posix.cc b/src/core/lib/iomgr/resolve_address_posix.cc
index 3eea709ce4..dd5363dc0a 100644
--- a/src/core/lib/iomgr/resolve_address_posix.cc
+++ b/src/core/lib/iomgr/resolve_address_posix.cc
@@ -114,14 +114,14 @@ static grpc_error* blocking_resolve_address_impl(
   }
 
   /* Success path: set addrs non-NULL, fill it in */
-  *addresses =
-      (grpc_resolved_addresses*)gpr_malloc(sizeof(grpc_resolved_addresses));
+  *addresses = static_cast<grpc_resolved_addresses*>(
+      gpr_malloc(sizeof(grpc_resolved_addresses)));
   (*addresses)->naddrs = 0;
   for (resp = result; resp != nullptr; resp = resp->ai_next) {
     (*addresses)->naddrs++;
   }
-  (*addresses)->addrs = (grpc_resolved_address*)gpr_malloc(
-      sizeof(grpc_resolved_address) * (*addresses)->naddrs);
+  (*addresses)->addrs = static_cast<grpc_resolved_address*>(
+      gpr_malloc(sizeof(grpc_resolved_address) * (*addresses)->naddrs));
   i = 0;
   for (resp = result; resp != nullptr; resp = resp->ai_next) {
     memcpy(&(*addresses)->addrs[i].addr, resp->ai_addr, resp->ai_addrlen);
@@ -155,7 +155,7 @@ typedef struct {
 /* Callback to be passed to grpc_executor to asynch-ify
  * grpc_blocking_resolve_address */
 static void do_request_thread(void* rp, grpc_error* error) {
-  request* r = (request*)rp;
+  request* r = static_cast<request*>(rp);
   GRPC_CLOSURE_SCHED(r->on_done, grpc_blocking_resolve_address(
                                      r->name, r->default_port, r->addrs_out));
   gpr_free(r->name);
@@ -174,7 +174,7 @@ static void resolve_address_impl(const char* name, const char* default_port,
                                  grpc_pollset_set* interested_parties,
                                  grpc_closure* on_done,
                                  grpc_resolved_addresses** addrs) {
-  request* r = (request*)gpr_malloc(sizeof(request));
+  request* r = static_cast<request*>(gpr_malloc(sizeof(request)));
   GRPC_CLOSURE_INIT(&r->request_closure, do_request_thread, r,
                     grpc_executor_scheduler(GRPC_EXECUTOR_SHORT));
   r->name = gpr_strdup(name);
diff --git a/src/core/lib/iomgr/resource_quota.cc b/src/core/lib/iomgr/resource_quota.cc
index e64d772a7d..c4763f3229 100644
--- a/src/core/lib/iomgr/resource_quota.cc
+++ b/src/core/lib/iomgr/resource_quota.cc
@@ -244,7 +244,7 @@ static bool rq_reclaim_from_per_user_free_pool(
 static bool rq_reclaim(grpc_resource_quota* resource_quota, bool destructive);
 
 static void rq_step(void* rq, grpc_error* error) {
-  grpc_resource_quota* resource_quota = (grpc_resource_quota*)rq;
+  grpc_resource_quota* resource_quota = static_cast<grpc_resource_quota*>(rq);
   resource_quota->step_scheduled = false;
   do {
     if (rq_alloc(resource_quota)) goto done;
@@ -303,7 +303,7 @@ static bool rq_alloc(grpc_resource_quota* resource_quota) {
       resource_user->free_pool += aborted_allocations;
       GRPC_CLOSURE_LIST_SCHED(&resource_user->on_allocated);
       gpr_mu_unlock(&resource_user->mu);
-      ru_unref_by(resource_user, (gpr_atm)aborted_allocations);
+      ru_unref_by(resource_user, static_cast<gpr_atm>(aborted_allocations));
       continue;
     }
     if (resource_user->free_pool < 0 &&
@@ -401,12 +401,12 @@ typedef struct {
 } ru_slice_refcount;
 
 static void ru_slice_ref(void* p) {
-  ru_slice_refcount* rc = (ru_slice_refcount*)p;
+  ru_slice_refcount* rc = static_cast<ru_slice_refcount*>(p);
   gpr_ref(&rc->refs);
 }
 
 static void ru_slice_unref(void* p) {
-  ru_slice_refcount* rc = (ru_slice_refcount*)p;
+  ru_slice_refcount* rc = static_cast<ru_slice_refcount*>(p);
   if (gpr_unref(&rc->refs)) {
     grpc_resource_user_free(rc->resource_user, rc->size);
     gpr_free(rc);
@@ -419,8 +419,8 @@ static const grpc_slice_refcount_vtable ru_slice_vtable = {
 
 static grpc_slice ru_slice_create(grpc_resource_user* resource_user,
                                   size_t size) {
-  ru_slice_refcount* rc =
-      (ru_slice_refcount*)gpr_malloc(sizeof(ru_slice_refcount) + size);
+  ru_slice_refcount* rc = static_cast<ru_slice_refcount*>(
+      gpr_malloc(sizeof(ru_slice_refcount) + size));
   rc->base.vtable = &ru_slice_vtable;
   rc->base.sub_refcount = &rc->base;
   gpr_ref_init(&rc->refs, 1);
@@ -428,7 +428,7 @@ static grpc_slice ru_slice_create(grpc_resource_user* resource_user,
   rc->size = size;
   grpc_slice slice;
   slice.refcount = &rc->base;
-  slice.data.refcounted.bytes = (uint8_t*)(rc + 1);
+  slice.data.refcounted.bytes = reinterpret_cast<uint8_t*>(rc + 1);
   slice.data.refcounted.length = size;
   return slice;
 }
@@ -439,7 +439,7 @@ static grpc_slice ru_slice_create(grpc_resource_user* resource_user,
  */
 
 static void ru_allocate(void* ru, grpc_error* error) {
-  grpc_resource_user* resource_user = (grpc_resource_user*)ru;
+  grpc_resource_user* resource_user = static_cast<grpc_resource_user*>(ru);
   if (rulist_empty(resource_user->resource_quota,
                    GRPC_RULIST_AWAITING_ALLOCATION)) {
     rq_step_sched(resource_user->resource_quota);
@@ -448,7 +448,7 @@ static void ru_allocate(void* ru, grpc_error* error) {
 }
 
 static void ru_add_to_free_pool(void* ru, grpc_error* error) {
-  grpc_resource_user* resource_user = (grpc_resource_user*)ru;
+  grpc_resource_user* resource_user = static_cast<grpc_resource_user*>(ru);
   if (!rulist_empty(resource_user->resource_quota,
                     GRPC_RULIST_AWAITING_ALLOCATION) &&
       rulist_empty(resource_user->resource_quota,
@@ -473,7 +473,7 @@ static bool ru_post_reclaimer(grpc_resource_user* resource_user,
 }
 
 static void ru_post_benign_reclaimer(void* ru, grpc_error* error) {
-  grpc_resource_user* resource_user = (grpc_resource_user*)ru;
+  grpc_resource_user* resource_user = static_cast<grpc_resource_user*>(ru);
   if (!ru_post_reclaimer(resource_user, false)) return;
   if (!rulist_empty(resource_user->resource_quota,
                     GRPC_RULIST_AWAITING_ALLOCATION) &&
@@ -487,7 +487,7 @@ static void ru_post_benign_reclaimer(void* ru, grpc_error* error) {
 }
 
 static void ru_post_destructive_reclaimer(void* ru, grpc_error* error) {
-  grpc_resource_user* resource_user = (grpc_resource_user*)ru;
+  grpc_resource_user* resource_user = static_cast<grpc_resource_user*>(ru);
   if (!ru_post_reclaimer(resource_user, true)) return;
   if (!rulist_empty(resource_user->resource_quota,
                     GRPC_RULIST_AWAITING_ALLOCATION) &&
@@ -506,7 +506,7 @@ static void ru_shutdown(void* ru, grpc_error* error) {
   if (grpc_resource_quota_trace.enabled()) {
     gpr_log(GPR_DEBUG, "RU shutdown %p", ru);
   }
-  grpc_resource_user* resource_user = (grpc_resource_user*)ru;
+  grpc_resource_user* resource_user = static_cast<grpc_resource_user*>(ru);
   gpr_mu_lock(&resource_user->mu);
   GRPC_CLOSURE_SCHED(resource_user->reclaimers[0], GRPC_ERROR_CANCELLED);
   GRPC_CLOSURE_SCHED(resource_user->reclaimers[1], GRPC_ERROR_CANCELLED);
@@ -521,10 +521,10 @@ static void ru_shutdown(void* ru, grpc_error* error) {
 }
 
 static void ru_destroy(void* ru, grpc_error* error) {
-  grpc_resource_user* resource_user = (grpc_resource_user*)ru;
+  grpc_resource_user* resource_user = static_cast<grpc_resource_user*>(ru);
   GPR_ASSERT(gpr_atm_no_barrier_load(&resource_user->refs) == 0);
   for (int i = 0; i < GRPC_RULIST_COUNT; i++) {
-    rulist_remove(resource_user, (grpc_rulist)i);
+    rulist_remove(resource_user, static_cast<grpc_rulist>(i));
   }
   GRPC_CLOSURE_SCHED(resource_user->reclaimers[0], GRPC_ERROR_CANCELLED);
   GRPC_CLOSURE_SCHED(resource_user->reclaimers[1], GRPC_ERROR_CANCELLED);
@@ -540,7 +540,7 @@ static void ru_destroy(void* ru, grpc_error* error) {
 
 static void ru_allocated_slices(void* arg, grpc_error* error) {
   grpc_resource_user_slice_allocator* slice_allocator =
-      (grpc_resource_user_slice_allocator*)arg;
+      static_cast<grpc_resource_user_slice_allocator*>(arg);
   if (error == GRPC_ERROR_NONE) {
     for (size_t i = 0; i < slice_allocator->count; i++) {
       grpc_slice_buffer_add_indexed(
@@ -563,7 +563,7 @@ typedef struct {
 } rq_resize_args;
 
 static void rq_resize(void* args, grpc_error* error) {
-  rq_resize_args* a = (rq_resize_args*)args;
+  rq_resize_args* a = static_cast<rq_resize_args*>(args);
   int64_t delta = a->size - a->resource_quota->size;
   a->resource_quota->size += delta;
   a->resource_quota->free_pool += delta;
@@ -574,7 +574,7 @@ static void rq_resize(void* args, grpc_error* error) {
 }
 
 static void rq_reclamation_done(void* rq, grpc_error* error) {
-  grpc_resource_quota* resource_quota = (grpc_resource_quota*)rq;
+  grpc_resource_quota* resource_quota = static_cast<grpc_resource_quota*>(rq);
   resource_quota->reclaiming = false;
   rq_step_sched(resource_quota);
   grpc_resource_quota_unref_internal(resource_quota);
@@ -587,7 +587,7 @@ static void rq_reclamation_done(void* rq, grpc_error* error) {
 /* Public API */
 grpc_resource_quota* grpc_resource_quota_create(const char* name) {
   grpc_resource_quota* resource_quota =
-      (grpc_resource_quota*)gpr_malloc(sizeof(*resource_quota));
+      static_cast<grpc_resource_quota*>(gpr_malloc(sizeof(*resource_quota)));
   gpr_ref_init(&resource_quota->refs, 1);
   resource_quota->combiner = grpc_combiner_create();
   resource_quota->free_pool = INT64_MAX;
@@ -640,18 +640,18 @@ void grpc_resource_quota_ref(grpc_resource_quota* resource_quota) {
 
 double grpc_resource_quota_get_memory_pressure(
     grpc_resource_quota* resource_quota) {
-  return ((double)(gpr_atm_no_barrier_load(
+  return (static_cast<double>(gpr_atm_no_barrier_load(
              &resource_quota->memory_usage_estimation))) /
-         ((double)MEMORY_USAGE_ESTIMATION_MAX);
+         (static_cast<double>(MEMORY_USAGE_ESTIMATION_MAX));
 }
 
 /* Public API */
 void grpc_resource_quota_resize(grpc_resource_quota* resource_quota,
                                 size_t size) {
   grpc_core::ExecCtx exec_ctx;
-  rq_resize_args* a = (rq_resize_args*)gpr_malloc(sizeof(*a));
+  rq_resize_args* a = static_cast<rq_resize_args*>(gpr_malloc(sizeof(*a)));
   a->resource_quota = grpc_resource_quota_ref_internal(resource_quota);
-  a->size = (int64_t)size;
+  a->size = static_cast<int64_t>(size);
   gpr_atm_no_barrier_store(&resource_quota->last_size,
                            (gpr_atm)GPR_MIN((size_t)GPR_ATM_MAX, size));
   GRPC_CLOSURE_INIT(&a->closure, rq_resize, a, grpc_schedule_on_exec_ctx);
@@ -659,7 +659,8 @@ void grpc_resource_quota_resize(grpc_resource_quota* resource_quota,
 }
 
 size_t grpc_resource_quota_peek_size(grpc_resource_quota* resource_quota) {
-  return (size_t)gpr_atm_no_barrier_load(&resource_quota->last_size);
+  return static_cast<size_t>(
+      gpr_atm_no_barrier_load(&resource_quota->last_size));
 }
 
 /*******************************************************************************
@@ -672,7 +673,8 @@ grpc_resource_quota* grpc_resource_quota_from_channel_args(
     if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) {
       if (channel_args->args[i].type == GRPC_ARG_POINTER) {
         return grpc_resource_quota_ref_internal(
-            (grpc_resource_quota*)channel_args->args[i].value.pointer.p);
+            static_cast<grpc_resource_quota*>(
+                channel_args->args[i].value.pointer.p));
       } else {
         gpr_log(GPR_DEBUG, GRPC_ARG_RESOURCE_QUOTA " should be a pointer");
       }
@@ -682,12 +684,12 @@ grpc_resource_quota* grpc_resource_quota_from_channel_args(
 }
 
 static void* rq_copy(void* rq) {
-  grpc_resource_quota_ref((grpc_resource_quota*)rq);
+  grpc_resource_quota_ref(static_cast<grpc_resource_quota*>(rq));
   return rq;
 }
 
 static void rq_destroy(void* rq) {
-  grpc_resource_quota_unref_internal((grpc_resource_quota*)rq);
+  grpc_resource_quota_unref_internal(static_cast<grpc_resource_quota*>(rq));
 }
 
 static int rq_cmp(void* a, void* b) { return GPR_ICMP(a, b); }
@@ -704,7 +706,7 @@ const grpc_arg_pointer_vtable* grpc_resource_quota_arg_vtable(void) {
 grpc_resource_user* grpc_resource_user_create(
     grpc_resource_quota* resource_quota, const char* name) {
   grpc_resource_user* resource_user =
-      (grpc_resource_user*)gpr_malloc(sizeof(*resource_user));
+      static_cast<grpc_resource_user*>(gpr_malloc(sizeof(*resource_user)));
   resource_user->resource_quota =
       grpc_resource_quota_ref_internal(resource_quota);
   GRPC_CLOSURE_INIT(&resource_user->allocate_closure, &ru_allocate,
@@ -785,9 +787,9 @@ void grpc_resource_user_shutdown(grpc_resource_user* resource_user) {
 void grpc_resource_user_alloc(grpc_resource_user* resource_user, size_t size,
                               grpc_closure* optional_on_done) {
   gpr_mu_lock(&resource_user->mu);
-  ru_ref_by(resource_user, (gpr_atm)size);
-  resource_user->free_pool -= (int64_t)size;
-  resource_user->outstanding_allocations += (int64_t)size;
+  ru_ref_by(resource_user, static_cast<gpr_atm>(size));
+  resource_user->free_pool -= static_cast<int64_t>(size);
+  resource_user->outstanding_allocations += static_cast<int64_t>(size);
   if (grpc_resource_quota_trace.enabled()) {
     gpr_log(GPR_DEBUG, "RQ %s %s: alloc %" PRIdPTR "; free_pool -> %" PRId64,
             resource_user->resource_quota->name, resource_user->name, size,
@@ -801,7 +803,7 @@ void grpc_resource_user_alloc(grpc_resource_user* resource_user, size_t size,
       GRPC_CLOSURE_SCHED(&resource_user->allocate_closure, GRPC_ERROR_NONE);
     }
   } else {
-    resource_user->outstanding_allocations -= (int64_t)size;
+    resource_user->outstanding_allocations -= static_cast<int64_t>(size);
     GRPC_CLOSURE_SCHED(optional_on_done, GRPC_ERROR_NONE);
   }
   gpr_mu_unlock(&resource_user->mu);
@@ -810,7 +812,7 @@ void grpc_resource_user_alloc(grpc_resource_user* resource_user, size_t size,
 void grpc_resource_user_free(grpc_resource_user* resource_user, size_t size) {
   gpr_mu_lock(&resource_user->mu);
   bool was_zero_or_negative = resource_user->free_pool <= 0;
-  resource_user->free_pool += (int64_t)size;
+  resource_user->free_pool += static_cast<int64_t>(size);
   if (grpc_resource_quota_trace.enabled()) {
     gpr_log(GPR_DEBUG, "RQ %s %s: free %" PRIdPTR "; free_pool -> %" PRId64,
             resource_user->resource_quota->name, resource_user->name, size,
@@ -824,7 +826,7 @@ void grpc_resource_user_free(grpc_resource_user* resource_user, size_t size) {
                        GRPC_ERROR_NONE);
   }
   gpr_mu_unlock(&resource_user->mu);
-  ru_unref_by(resource_user, (gpr_atm)size);
+  ru_unref_by(resource_user, static_cast<gpr_atm>(size));
 }
 
 void grpc_resource_user_post_reclaimer(grpc_resource_user* resource_user,
diff --git a/src/core/lib/iomgr/sockaddr_utils.cc b/src/core/lib/iomgr/sockaddr_utils.cc
index ac97af4dee..69be87168e 100644
--- a/src/core/lib/iomgr/sockaddr_utils.cc
+++ b/src/core/lib/iomgr/sockaddr_utils.cc
@@ -39,13 +39,15 @@ static const uint8_t kV4MappedPrefix[] = {0, 0, 0, 0, 0,    0,
 int grpc_sockaddr_is_v4mapped(const grpc_resolved_address* resolved_addr,
                               grpc_resolved_address* resolved_addr4_out) {
   GPR_ASSERT(resolved_addr != resolved_addr4_out);
-  const struct sockaddr* addr = (const struct sockaddr*)resolved_addr->addr;
+  const struct sockaddr* addr =
+      reinterpret_cast<const struct sockaddr*>(resolved_addr->addr);
   struct sockaddr_in* addr4_out =
       resolved_addr4_out == nullptr
           ? nullptr
-          : (struct sockaddr_in*)resolved_addr4_out->addr;
+          : reinterpret_cast<struct sockaddr_in*>(resolved_addr4_out->addr);
   if (addr->sa_family == AF_INET6) {
-    const struct sockaddr_in6* addr6 = (const struct sockaddr_in6*)addr;
+    const struct sockaddr_in6* addr6 =
+        reinterpret_cast<const struct sockaddr_in6*>(addr);
     if (memcmp(addr6->sin6_addr.s6_addr, kV4MappedPrefix,
                sizeof(kV4MappedPrefix)) == 0) {
       if (resolved_addr4_out != nullptr) {
@@ -66,11 +68,13 @@ int grpc_sockaddr_is_v4mapped(const grpc_resolved_address* resolved_addr,
 int grpc_sockaddr_to_v4mapped(const grpc_resolved_address* resolved_addr,
                               grpc_resolved_address* resolved_addr6_out) {
   GPR_ASSERT(resolved_addr != resolved_addr6_out);
-  const struct sockaddr* addr = (const struct sockaddr*)resolved_addr->addr;
+  const struct sockaddr* addr =
+      reinterpret_cast<const struct sockaddr*>(resolved_addr->addr);
   struct sockaddr_in6* addr6_out =
-      (struct sockaddr_in6*)resolved_addr6_out->addr;
+      reinterpret_cast<struct sockaddr_in6*>(resolved_addr6_out->addr);
   if (addr->sa_family == AF_INET) {
-    const struct sockaddr_in* addr4 = (const struct sockaddr_in*)addr;
+    const struct sockaddr_in* addr4 =
+        reinterpret_cast<const struct sockaddr_in*>(addr);
     memset(resolved_addr6_out, 0, sizeof(*resolved_addr6_out));
     addr6_out->sin6_family = AF_INET6;
     memcpy(&addr6_out->sin6_addr.s6_addr[0], kV4MappedPrefix, 12);
@@ -89,10 +93,11 @@ int grpc_sockaddr_is_wildcard(const grpc_resolved_address* resolved_addr,
   if (grpc_sockaddr_is_v4mapped(resolved_addr, &addr4_normalized)) {
     resolved_addr = &addr4_normalized;
   }
-  addr = (const struct sockaddr*)resolved_addr->addr;
+  addr = reinterpret_cast<const struct sockaddr*>(resolved_addr->addr);
   if (addr->sa_family == AF_INET) {
     /* Check for 0.0.0.0 */
-    const struct sockaddr_in* addr4 = (const struct sockaddr_in*)addr;
+    const struct sockaddr_in* addr4 =
+        reinterpret_cast<const struct sockaddr_in*>(addr);
     if (addr4->sin_addr.s_addr != 0) {
       return 0;
     }
@@ -100,7 +105,8 @@ int grpc_sockaddr_is_wildcard(const grpc_resolved_address* resolved_addr,
     return 1;
   } else if (addr->sa_family == AF_INET6) {
     /* Check for :: */
-    const struct sockaddr_in6* addr6 = (const struct sockaddr_in6*)addr;
+    const struct sockaddr_in6* addr6 =
+        reinterpret_cast<const struct sockaddr_in6*>(addr);
     int i;
     for (i = 0; i < 16; i++) {
       if (addr6->sin6_addr.s6_addr[i] != 0) {
@@ -122,21 +128,23 @@ void grpc_sockaddr_make_wildcards(int port, grpc_resolved_address* wild4_out,
 
 void grpc_sockaddr_make_wildcard4(int port,
                                   grpc_resolved_address* resolved_wild_out) {
-  struct sockaddr_in* wild_out = (struct sockaddr_in*)resolved_wild_out->addr;
+  struct sockaddr_in* wild_out =
+      reinterpret_cast<struct sockaddr_in*>(resolved_wild_out->addr);
   GPR_ASSERT(port >= 0 && port < 65536);
   memset(resolved_wild_out, 0, sizeof(*resolved_wild_out));
   wild_out->sin_family = AF_INET;
-  wild_out->sin_port = htons((uint16_t)port);
+  wild_out->sin_port = htons(static_cast<uint16_t>(port));
   resolved_wild_out->len = sizeof(struct sockaddr_in);
 }
 
 void grpc_sockaddr_make_wildcard6(int port,
                                   grpc_resolved_address* resolved_wild_out) {
-  struct sockaddr_in6* wild_out = (struct sockaddr_in6*)resolved_wild_out->addr;
+  struct sockaddr_in6* wild_out =
+      reinterpret_cast<struct sockaddr_in6*>(resolved_wild_out->addr);
   GPR_ASSERT(port >= 0 && port < 65536);
   memset(resolved_wild_out, 0, sizeof(*resolved_wild_out));
   wild_out->sin6_family = AF_INET6;
-  wild_out->sin6_port = htons((uint16_t)port);
+  wild_out->sin6_port = htons(static_cast<uint16_t>(port));
   resolved_wild_out->len = sizeof(struct sockaddr_in6);
 }
 
@@ -156,13 +164,15 @@ int grpc_sockaddr_to_string(char** out,
   if (normalize && grpc_sockaddr_is_v4mapped(resolved_addr, &addr_normalized)) {
     resolved_addr = &addr_normalized;
   }
-  addr = (const struct sockaddr*)resolved_addr->addr;
+  addr = reinterpret_cast<const struct sockaddr*>(resolved_addr->addr);
   if (addr->sa_family == AF_INET) {
-    const struct sockaddr_in* addr4 = (const struct sockaddr_in*)addr;
+    const struct sockaddr_in* addr4 =
+        reinterpret_cast<const struct sockaddr_in*>(addr);
     ip = &addr4->sin_addr;
     port = ntohs(addr4->sin_port);
   } else if (addr->sa_family == AF_INET6) {
-    const struct sockaddr_in6* addr6 = (const struct sockaddr_in6*)addr;
+    const struct sockaddr_in6* addr6 =
+        reinterpret_cast<const struct sockaddr_in6*>(addr);
     ip = &addr6->sin6_addr;
     port = ntohs(addr6->sin6_port);
     sin6_scope_id = addr6->sin6_scope_id;
@@ -208,7 +218,8 @@ char* grpc_sockaddr_to_uri(const grpc_resolved_address* resolved_addr) {
 
 const char* grpc_sockaddr_get_uri_scheme(
     const grpc_resolved_address* resolved_addr) {
-  const struct sockaddr* addr = (const struct sockaddr*)resolved_addr->addr;
+  const struct sockaddr* addr =
+      reinterpret_cast<const struct sockaddr*>(resolved_addr->addr);
   switch (addr->sa_family) {
     case AF_INET:
       return "ipv4";
@@ -221,12 +232,14 @@ const char* grpc_sockaddr_get_uri_scheme(
 }
 
 int grpc_sockaddr_get_family(const grpc_resolved_address* resolved_addr) {
-  const struct sockaddr* addr = (const struct sockaddr*)resolved_addr->addr;
+  const struct sockaddr* addr =
+      reinterpret_cast<const struct sockaddr*>(resolved_addr->addr);
   return addr->sa_family;
 }
 
 int grpc_sockaddr_get_port(const grpc_resolved_address* resolved_addr) {
-  const struct sockaddr* addr = (const struct sockaddr*)resolved_addr->addr;
+  const struct sockaddr* addr =
+      reinterpret_cast<const struct sockaddr*>(resolved_addr->addr);
   switch (addr->sa_family) {
     case AF_INET:
       return ntohs(((struct sockaddr_in*)addr)->sin_port);
@@ -244,15 +257,18 @@ int grpc_sockaddr_get_port(const grpc_resolved_address* resolved_addr) {
 
 int grpc_sockaddr_set_port(const grpc_resolved_address* resolved_addr,
                            int port) {
-  const struct sockaddr* addr = (const struct sockaddr*)resolved_addr->addr;
+  const struct sockaddr* addr =
+      reinterpret_cast<const struct sockaddr*>(resolved_addr->addr);
   switch (addr->sa_family) {
     case AF_INET:
       GPR_ASSERT(port >= 0 && port < 65536);
-      ((struct sockaddr_in*)addr)->sin_port = htons((uint16_t)port);
+      ((struct sockaddr_in*)addr)->sin_port =
+          htons(static_cast<uint16_t>(port));
       return 1;
     case AF_INET6:
       GPR_ASSERT(port >= 0 && port < 65536);
-      ((struct sockaddr_in6*)addr)->sin6_port = htons((uint16_t)port);
+      ((struct sockaddr_in6*)addr)->sin6_port =
+          htons(static_cast<uint16_t>(port));
       return 1;
     default:
       gpr_log(GPR_ERROR, "Unknown socket family %d in grpc_sockaddr_set_port",
diff --git a/src/core/lib/iomgr/socket_factory_posix.cc b/src/core/lib/iomgr/socket_factory_posix.cc
index 1c1b2fb270..3e696c2e10 100644
--- a/src/core/lib/iomgr/socket_factory_posix.cc
+++ b/src/core/lib/iomgr/socket_factory_posix.cc
@@ -69,16 +69,16 @@ void grpc_socket_factory_unref(grpc_socket_factory* factory) {
 }
 
 static void* socket_factory_arg_copy(void* p) {
-  return grpc_socket_factory_ref((grpc_socket_factory*)p);
+  return grpc_socket_factory_ref(static_cast<grpc_socket_factory*>(p));
 }
 
 static void socket_factory_arg_destroy(void* p) {
-  grpc_socket_factory_unref((grpc_socket_factory*)p);
+  grpc_socket_factory_unref(static_cast<grpc_socket_factory*>(p));
 }
 
 static int socket_factory_cmp(void* a, void* b) {
-  return grpc_socket_factory_compare((grpc_socket_factory*)a,
-                                     (grpc_socket_factory*)b);
+  return grpc_socket_factory_compare(static_cast<grpc_socket_factory*>(a),
+                                     static_cast<grpc_socket_factory*>(b));
 }
 
 static const grpc_arg_pointer_vtable socket_factory_arg_vtable = {
diff --git a/src/core/lib/iomgr/socket_mutator.cc b/src/core/lib/iomgr/socket_mutator.cc
index 8c8f0e56e1..eb219d7cb3 100644
--- a/src/core/lib/iomgr/socket_mutator.cc
+++ b/src/core/lib/iomgr/socket_mutator.cc
@@ -60,16 +60,16 @@ void grpc_socket_mutator_unref(grpc_socket_mutator* mutator) {
 }
 
 static void* socket_mutator_arg_copy(void* p) {
-  return grpc_socket_mutator_ref((grpc_socket_mutator*)p);
+  return grpc_socket_mutator_ref(static_cast<grpc_socket_mutator*>(p));
 }
 
 static void socket_mutator_arg_destroy(void* p) {
-  grpc_socket_mutator_unref((grpc_socket_mutator*)p);
+  grpc_socket_mutator_unref(static_cast<grpc_socket_mutator*>(p));
 }
 
 static int socket_mutator_cmp(void* a, void* b) {
-  return grpc_socket_mutator_compare((grpc_socket_mutator*)a,
-                                     (grpc_socket_mutator*)b);
+  return grpc_socket_mutator_compare(static_cast<grpc_socket_mutator*>(a),
+                                     static_cast<grpc_socket_mutator*>(b));
 }
 
 static const grpc_arg_pointer_vtable socket_mutator_arg_vtable = {
diff --git a/src/core/lib/iomgr/socket_utils_common_posix.cc b/src/core/lib/iomgr/socket_utils_common_posix.cc
index d02d77eb02..a0cca6195b 100644
--- a/src/core/lib/iomgr/socket_utils_common_posix.cc
+++ b/src/core/lib/iomgr/socket_utils_common_posix.cc
@@ -218,7 +218,8 @@ static void probe_ipv6_once(void) {
     memset(&addr, 0, sizeof(addr));
     addr.sin6_family = AF_INET6;
     addr.sin6_addr.s6_addr[15] = 1; /* [::1]:0 */
-    if (bind(fd, (struct sockaddr*)&addr, sizeof(addr)) == 0) {
+    if (bind(fd, reinterpret_cast<struct sockaddr*>(&addr), sizeof(addr)) ==
+        0) {
       g_ipv6_loopback_available = 1;
     } else {
       gpr_log(GPR_INFO,
@@ -278,7 +279,8 @@ static int create_socket(grpc_socket_factory* factory, int domain, int type,
 grpc_error* grpc_create_dualstack_socket_using_factory(
     grpc_socket_factory* factory, const grpc_resolved_address* resolved_addr,
     int type, int protocol, grpc_dualstack_mode* dsmode, int* newfd) {
-  const struct sockaddr* addr = (const struct sockaddr*)resolved_addr->addr;
+  const struct sockaddr* addr =
+      reinterpret_cast<const struct sockaddr*>(resolved_addr->addr);
   int family = addr->sa_family;
   if (family == AF_INET6) {
     if (grpc_ipv6_loopback_available()) {
@@ -310,7 +312,7 @@ grpc_error* grpc_create_dualstack_socket_using_factory(
 
 const char* grpc_inet_ntop(int af, const void* src, char* dst, size_t size) {
   GPR_ASSERT(size <= (socklen_t)-1);
-  return inet_ntop(af, src, dst, (socklen_t)size);
+  return inet_ntop(af, src, dst, static_cast<socklen_t>(size));
 }
 
 #endif
diff --git a/src/core/lib/iomgr/socket_utils_linux.cc b/src/core/lib/iomgr/socket_utils_linux.cc
index 12199c5c89..e8bf05c3a8 100644
--- a/src/core/lib/iomgr/socket_utils_linux.cc
+++ b/src/core/lib/iomgr/socket_utils_linux.cc
@@ -35,8 +35,9 @@ int grpc_accept4(int sockfd, grpc_resolved_address* resolved_addr, int nonblock,
   GPR_ASSERT(resolved_addr->len <= (socklen_t)-1);
   flags |= nonblock ? SOCK_NONBLOCK : 0;
   flags |= cloexec ? SOCK_CLOEXEC : 0;
-  return accept4(sockfd, (struct sockaddr*)resolved_addr->addr,
-                 (socklen_t*)&resolved_addr->len, flags);
+  return accept4(sockfd,
+                 reinterpret_cast<struct sockaddr*>(resolved_addr->addr),
+                 reinterpret_cast<socklen_t*>(&resolved_addr->len), flags);
 }
 
 #endif
diff --git a/src/core/lib/iomgr/tcp_client_posix.cc b/src/core/lib/iomgr/tcp_client_posix.cc
index 3dff624065..33a0b0404d 100644
--- a/src/core/lib/iomgr/tcp_client_posix.cc
+++ b/src/core/lib/iomgr/tcp_client_posix.cc
@@ -79,8 +79,8 @@ static grpc_error* prepare_socket(const grpc_resolved_address* addr, int fd,
     for (size_t i = 0; i < channel_args->num_args; i++) {
       if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_SOCKET_MUTATOR)) {
         GPR_ASSERT(channel_args->args[i].type == GRPC_ARG_POINTER);
-        grpc_socket_mutator* mutator =
-            (grpc_socket_mutator*)channel_args->args[i].value.pointer.p;
+        grpc_socket_mutator* mutator = static_cast<grpc_socket_mutator*>(
+            channel_args->args[i].value.pointer.p);
         err = grpc_set_socket_with_mutator(fd, mutator);
         if (err != GRPC_ERROR_NONE) goto error;
       }
@@ -98,7 +98,7 @@ done:
 
 static void tc_on_alarm(void* acp, grpc_error* error) {
   int done;
-  async_connect* ac = (async_connect*)acp;
+  async_connect* ac = static_cast<async_connect*>(acp);
   if (grpc_tcp_trace.enabled()) {
     const char* str = grpc_error_string(error);
     gpr_log(GPR_DEBUG, "CLIENT_CONNECT: %s: on_alarm: error=%s", ac->addr_str,
@@ -125,7 +125,7 @@ grpc_endpoint* grpc_tcp_client_create_from_fd(
 }
 
 static void on_writable(void* acp, grpc_error* error) {
-  async_connect* ac = (async_connect*)acp;
+  async_connect* ac = static_cast<async_connect*>(acp);
   int so_error = 0;
   socklen_t so_error_size;
   int err;
@@ -291,7 +291,8 @@ void grpc_tcp_client_create_from_prepared_fd(
   async_connect* ac;
   do {
     GPR_ASSERT(addr->len < ~(socklen_t)0);
-    err = connect(fd, (const struct sockaddr*)addr->addr, (socklen_t)addr->len);
+    err = connect(fd, reinterpret_cast<const struct sockaddr*>(addr->addr),
+                  static_cast<socklen_t>(addr->len));
   } while (err < 0 && errno == EINTR);
   if (err >= 0) {
     char* addr_str = grpc_sockaddr_to_uri(addr);
@@ -309,7 +310,7 @@ void grpc_tcp_client_create_from_prepared_fd(
 
   grpc_pollset_set_add_fd(interested_parties, fdobj);
 
-  ac = (async_connect*)gpr_malloc(sizeof(async_connect));
+  ac = static_cast<async_connect*>(gpr_malloc(sizeof(async_connect)));
   ac->closure = closure;
   ac->ep = ep;
   ac->fd = fdobj;
diff --git a/src/core/lib/iomgr/tcp_posix.cc b/src/core/lib/iomgr/tcp_posix.cc
index e78e19761a..50efd04382 100644
--- a/src/core/lib/iomgr/tcp_posix.cc
+++ b/src/core/lib/iomgr/tcp_posix.cc
@@ -116,7 +116,7 @@ static void tcp_drop_uncovered_then_handle_write(void* arg /* grpc_tcp */,
                                                  grpc_error* error);
 
 static void done_poller(void* bp, grpc_error* error_ignored) {
-  backup_poller* p = (backup_poller*)bp;
+  backup_poller* p = static_cast<backup_poller*>(bp);
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "BACKUP_POLLER:%p destroy", p);
   }
@@ -125,7 +125,7 @@ static void done_poller(void* bp, grpc_error* error_ignored) {
 }
 
 static void run_poller(void* bp, grpc_error* error_ignored) {
-  backup_poller* p = (backup_poller*)bp;
+  backup_poller* p = static_cast<backup_poller*>(bp);
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "BACKUP_POLLER:%p run", p);
   }
@@ -165,8 +165,8 @@ static void drop_uncovered(grpc_tcp* tcp) {
   gpr_atm old_count =
       gpr_atm_no_barrier_fetch_add(&g_uncovered_notifications_pending, -1);
   if (grpc_tcp_trace.enabled()) {
-    gpr_log(GPR_DEBUG, "BACKUP_POLLER:%p uncover cnt %d->%d", p, (int)old_count,
-            (int)old_count - 1);
+    gpr_log(GPR_DEBUG, "BACKUP_POLLER:%p uncover cnt %d->%d", p,
+            static_cast<int>(old_count), static_cast<int>(old_count) - 1);
   }
   GPR_ASSERT(old_count != 1);
 }
@@ -176,12 +176,13 @@ static void cover_self(grpc_tcp* tcp) {
   gpr_atm old_count =
       gpr_atm_no_barrier_fetch_add(&g_uncovered_notifications_pending, 2);
   if (grpc_tcp_trace.enabled()) {
-    gpr_log(GPR_DEBUG, "BACKUP_POLLER: cover cnt %d->%d", (int)old_count,
-            2 + (int)old_count);
+    gpr_log(GPR_DEBUG, "BACKUP_POLLER: cover cnt %d->%d",
+            static_cast<int>(old_count), 2 + static_cast<int>(old_count));
   }
   if (old_count == 0) {
     GRPC_STATS_INC_TCP_BACKUP_POLLERS_CREATED();
-    p = (backup_poller*)gpr_zalloc(sizeof(*p) + grpc_pollset_size());
+    p = static_cast<backup_poller*>(
+        gpr_zalloc(sizeof(*p) + grpc_pollset_size()));
     if (grpc_tcp_trace.enabled()) {
       gpr_log(GPR_DEBUG, "BACKUP_POLLER:%p create", p);
     }
@@ -230,12 +231,12 @@ static void tcp_drop_uncovered_then_handle_write(void* arg, grpc_error* error) {
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "TCP:%p got_write: %s", arg, grpc_error_string(error));
   }
-  drop_uncovered((grpc_tcp*)arg);
+  drop_uncovered(static_cast<grpc_tcp*>(arg));
   tcp_handle_write(arg, error);
 }
 
 static void add_to_estimate(grpc_tcp* tcp, size_t bytes) {
-  tcp->bytes_read_this_round += (double)bytes;
+  tcp->bytes_read_this_round += static_cast<double>(bytes);
 }
 
 static void finish_estimate(grpc_tcp* tcp) {
@@ -257,10 +258,10 @@ static size_t get_target_read_size(grpc_tcp* tcp) {
   double pressure = grpc_resource_quota_get_memory_pressure(rq);
   double target =
       tcp->target_length * (pressure > 0.8 ? (1.0 - pressure) / 0.2 : 1.0);
-  size_t sz = (((size_t)GPR_CLAMP(target, tcp->min_read_chunk_size,
-                                  tcp->max_read_chunk_size)) +
+  size_t sz = ((static_cast<size_t> GPR_CLAMP(target, tcp->min_read_chunk_size,
+                                              tcp->max_read_chunk_size)) +
                255) &
-              ~(size_t)255;
+              ~static_cast<size_t>(255);
   /* don't use more than 1/16th of the overall resource quota for a single read
    * alloc */
   size_t rqmax = grpc_resource_quota_peek_size(rq);
@@ -285,7 +286,7 @@ static void tcp_handle_read(void* arg /* grpc_tcp */, grpc_error* error);
 static void tcp_handle_write(void* arg /* grpc_tcp */, grpc_error* error);
 
 static void tcp_shutdown(grpc_endpoint* ep, grpc_error* why) {
-  grpc_tcp* tcp = (grpc_tcp*)ep;
+  grpc_tcp* tcp = reinterpret_cast<grpc_tcp*>(ep);
   grpc_fd_shutdown(tcp->em_fd, why);
   grpc_resource_user_shutdown(tcp->resource_user);
 }
@@ -339,7 +340,7 @@ static void tcp_ref(grpc_tcp* tcp) { gpr_ref(&tcp->refcount); }
 
 static void tcp_destroy(grpc_endpoint* ep) {
   grpc_network_status_unregister_endpoint(ep);
-  grpc_tcp* tcp = (grpc_tcp*)ep;
+  grpc_tcp* tcp = reinterpret_cast<grpc_tcp*>(ep);
   grpc_slice_buffer_reset_and_unref_internal(&tcp->last_read_buffer);
   TCP_UNREF(tcp, "destroy");
 }
@@ -385,7 +386,7 @@ static void tcp_do_read(grpc_tcp* tcp) {
   msg.msg_name = nullptr;
   msg.msg_namelen = 0;
   msg.msg_iov = iov;
-  msg.msg_iovlen = (msg_iovlen_type)tcp->incoming_buffer->count;
+  msg.msg_iovlen = static_cast<msg_iovlen_type>(tcp->incoming_buffer->count);
   msg.msg_control = nullptr;
   msg.msg_controllen = 0;
   msg.msg_flags = 0;
@@ -421,12 +422,12 @@ static void tcp_do_read(grpc_tcp* tcp) {
     TCP_UNREF(tcp, "read");
   } else {
     GRPC_STATS_INC_TCP_READ_SIZE(read_bytes);
-    add_to_estimate(tcp, (size_t)read_bytes);
+    add_to_estimate(tcp, static_cast<size_t>(read_bytes));
     GPR_ASSERT((size_t)read_bytes <= tcp->incoming_buffer->length);
-    if ((size_t)read_bytes < tcp->incoming_buffer->length) {
+    if (static_cast<size_t>(read_bytes) < tcp->incoming_buffer->length) {
       grpc_slice_buffer_trim_end(
           tcp->incoming_buffer,
-          tcp->incoming_buffer->length - (size_t)read_bytes,
+          tcp->incoming_buffer->length - static_cast<size_t>(read_bytes),
           &tcp->last_read_buffer);
     }
     GPR_ASSERT((size_t)read_bytes == tcp->incoming_buffer->length);
@@ -436,7 +437,7 @@ static void tcp_do_read(grpc_tcp* tcp) {
 }
 
 static void tcp_read_allocation_done(void* tcpp, grpc_error* error) {
-  grpc_tcp* tcp = (grpc_tcp*)tcpp;
+  grpc_tcp* tcp = static_cast<grpc_tcp*>(tcpp);
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "TCP:%p read_allocation_done: %s", tcp,
             grpc_error_string(error));
@@ -469,7 +470,7 @@ static void tcp_continue_read(grpc_tcp* tcp) {
 }
 
 static void tcp_handle_read(void* arg /* grpc_tcp */, grpc_error* error) {
-  grpc_tcp* tcp = (grpc_tcp*)arg;
+  grpc_tcp* tcp = static_cast<grpc_tcp*>(arg);
   GPR_ASSERT(!tcp->finished_edge);
   if (grpc_tcp_trace.enabled()) {
     gpr_log(GPR_DEBUG, "TCP:%p got_read: %s", tcp, grpc_error_string(error));
@@ -487,7 +488,7 @@ static void tcp_handle_read(void* arg /* grpc_tcp */, grpc_error* error) {
 
 static void tcp_read(grpc_endpoint* ep, grpc_slice_buffer* incoming_buffer,
                      grpc_closure* cb) {
-  grpc_tcp* tcp = (grpc_tcp*)ep;
+  grpc_tcp* tcp = reinterpret_cast<grpc_tcp*>(ep);
   GPR_ASSERT(tcp->read_cb == nullptr);
   tcp->read_cb = cb;
   tcp->incoming_buffer = incoming_buffer;
@@ -578,7 +579,7 @@ static bool tcp_flush(grpc_tcp* tcp, grpc_error** error) {
     }
 
     GPR_ASSERT(tcp->outgoing_byte_idx == 0);
-    trailing = sending_length - (size_t)sent_length;
+    trailing = sending_length - static_cast<size_t>(sent_length);
     while (trailing > 0) {
       size_t slice_length;
 
@@ -602,7 +603,7 @@ static bool tcp_flush(grpc_tcp* tcp, grpc_error** error) {
 }
 
 static void tcp_handle_write(void* arg /* grpc_tcp */, grpc_error* error) {
-  grpc_tcp* tcp = (grpc_tcp*)arg;
+  grpc_tcp* tcp = static_cast<grpc_tcp*>(arg);
   grpc_closure* cb;
 
   if (error != GRPC_ERROR_NONE) {
@@ -634,7 +635,7 @@ static void tcp_handle_write(void* arg /* grpc_tcp */, grpc_error* error) {
 static void tcp_write(grpc_endpoint* ep, grpc_slice_buffer* buf,
                       grpc_closure* cb) {
   GPR_TIMER_SCOPE("tcp_write", 0);
-  grpc_tcp* tcp = (grpc_tcp*)ep;
+  grpc_tcp* tcp = reinterpret_cast<grpc_tcp*>(ep);
   grpc_error* error = GRPC_ERROR_NONE;
 
   if (grpc_tcp_trace.enabled()) {
@@ -678,34 +679,34 @@ static void tcp_write(grpc_endpoint* ep, grpc_slice_buffer* buf,
 }
 
 static void tcp_add_to_pollset(grpc_endpoint* ep, grpc_pollset* pollset) {
-  grpc_tcp* tcp = (grpc_tcp*)ep;
+  grpc_tcp* tcp = reinterpret_cast<grpc_tcp*>(ep);
   grpc_pollset_add_fd(pollset, tcp->em_fd);
 }
 
 static void tcp_add_to_pollset_set(grpc_endpoint* ep,
                                    grpc_pollset_set* pollset_set) {
-  grpc_tcp* tcp = (grpc_tcp*)ep;
+  grpc_tcp* tcp = reinterpret_cast<grpc_tcp*>(ep);
   grpc_pollset_set_add_fd(pollset_set, tcp->em_fd);
 }
 
 static void tcp_delete_from_pollset_set(grpc_endpoint* ep,
                                         grpc_pollset_set* pollset_set) {
-  grpc_tcp* tcp = (grpc_tcp*)ep;
+  grpc_tcp* tcp = reinterpret_cast<grpc_tcp*>(ep);
   grpc_pollset_set_del_fd(pollset_set, tcp->em_fd);
 }
 
 static char* tcp_get_peer(grpc_endpoint* ep) {
-  grpc_tcp* tcp = (grpc_tcp*)ep;
+  grpc_tcp* tcp = reinterpret_cast<grpc_tcp*>(ep);
   return gpr_strdup(tcp->peer_string);
 }
 
 static int tcp_get_fd(grpc_endpoint* ep) {
-  grpc_tcp* tcp = (grpc_tcp*)ep;
+  grpc_tcp* tcp = reinterpret_cast<grpc_tcp*>(ep);
   return tcp->fd;
 }
 
 static grpc_resource_user* tcp_get_resource_user(grpc_endpoint* ep) {
-  grpc_tcp* tcp = (grpc_tcp*)ep;
+  grpc_tcp* tcp = reinterpret_cast<grpc_tcp*>(ep);
   return tcp->resource_user;
 }
 
@@ -733,27 +734,25 @@ grpc_endpoint* grpc_tcp_create(grpc_fd* em_fd,
     for (size_t i = 0; i < channel_args->num_args; i++) {
       if (0 ==
           strcmp(channel_args->args[i].key, GRPC_ARG_TCP_READ_CHUNK_SIZE)) {
-        grpc_integer_options options = {(int)tcp_read_chunk_size, 1,
-                                        MAX_CHUNK_SIZE};
+        grpc_integer_options options = {tcp_read_chunk_size, 1, MAX_CHUNK_SIZE};
         tcp_read_chunk_size =
             grpc_channel_arg_get_integer(&channel_args->args[i], options);
       } else if (0 == strcmp(channel_args->args[i].key,
                              GRPC_ARG_TCP_MIN_READ_CHUNK_SIZE)) {
-        grpc_integer_options options = {(int)tcp_read_chunk_size, 1,
-                                        MAX_CHUNK_SIZE};
+        grpc_integer_options options = {tcp_read_chunk_size, 1, MAX_CHUNK_SIZE};
         tcp_min_read_chunk_size =
             grpc_channel_arg_get_integer(&channel_args->args[i], options);
       } else if (0 == strcmp(channel_args->args[i].key,
                              GRPC_ARG_TCP_MAX_READ_CHUNK_SIZE)) {
-        grpc_integer_options options = {(int)tcp_read_chunk_size, 1,
-                                        MAX_CHUNK_SIZE};
+        grpc_integer_options options = {tcp_read_chunk_size, 1, MAX_CHUNK_SIZE};
         tcp_max_read_chunk_size =
             grpc_channel_arg_get_integer(&channel_args->args[i], options);
       } else if (0 ==
                  strcmp(channel_args->args[i].key, GRPC_ARG_RESOURCE_QUOTA)) {
         grpc_resource_quota_unref_internal(resource_quota);
-        resource_quota = grpc_resource_quota_ref_internal(
-            (grpc_resource_quota*)channel_args->args[i].value.pointer.p);
+        resource_quota =
+            grpc_resource_quota_ref_internal(static_cast<grpc_resource_quota*>(
+                channel_args->args[i].value.pointer.p));
       }
     }
   }
@@ -764,7 +763,7 @@ grpc_endpoint* grpc_tcp_create(grpc_fd* em_fd,
   tcp_read_chunk_size = GPR_CLAMP(tcp_read_chunk_size, tcp_min_read_chunk_size,
                                   tcp_max_read_chunk_size);
 
-  grpc_tcp* tcp = (grpc_tcp*)gpr_malloc(sizeof(grpc_tcp));
+  grpc_tcp* tcp = static_cast<grpc_tcp*>(gpr_malloc(sizeof(grpc_tcp)));
   tcp->base.vtable = &vtable;
   tcp->peer_string = gpr_strdup(peer_string);
   tcp->fd = grpc_fd_wrapped_fd(em_fd);
@@ -773,7 +772,7 @@ grpc_endpoint* grpc_tcp_create(grpc_fd* em_fd,
   tcp->release_fd_cb = nullptr;
   tcp->release_fd = nullptr;
   tcp->incoming_buffer = nullptr;
-  tcp->target_length = (double)tcp_read_chunk_size;
+  tcp->target_length = static_cast<double>(tcp_read_chunk_size);
   tcp->min_read_chunk_size = tcp_min_read_chunk_size;
   tcp->max_read_chunk_size = tcp_max_read_chunk_size;
   tcp->bytes_read_this_round = 0;
@@ -794,7 +793,7 @@ grpc_endpoint* grpc_tcp_create(grpc_fd* em_fd,
 }
 
 int grpc_tcp_fd(grpc_endpoint* ep) {
-  grpc_tcp* tcp = (grpc_tcp*)ep;
+  grpc_tcp* tcp = reinterpret_cast<grpc_tcp*>(ep);
   GPR_ASSERT(ep->vtable == &vtable);
   return grpc_fd_wrapped_fd(tcp->em_fd);
 }
@@ -802,7 +801,7 @@ int grpc_tcp_fd(grpc_endpoint* ep) {
 void grpc_tcp_destroy_and_release_fd(grpc_endpoint* ep, int* fd,
                                      grpc_closure* done) {
   grpc_network_status_unregister_endpoint(ep);
-  grpc_tcp* tcp = (grpc_tcp*)ep;
+  grpc_tcp* tcp = reinterpret_cast<grpc_tcp*>(ep);
   GPR_ASSERT(ep->vtable == &vtable);
   tcp->release_fd = fd;
   tcp->release_fd_cb = done;
diff --git a/src/core/lib/iomgr/tcp_server_posix.cc b/src/core/lib/iomgr/tcp_server_posix.cc
index 89d9160e02..fe6108e4ac 100644
--- a/src/core/lib/iomgr/tcp_server_posix.cc
+++ b/src/core/lib/iomgr/tcp_server_posix.cc
@@ -72,7 +72,8 @@ grpc_error* grpc_tcp_server_create(grpc_closure* shutdown_complete,
                                    grpc_tcp_server** server) {
   gpr_once_init(&check_init, init);
 
-  grpc_tcp_server* s = (grpc_tcp_server*)gpr_zalloc(sizeof(grpc_tcp_server));
+  grpc_tcp_server* s =
+      static_cast<grpc_tcp_server*>(gpr_zalloc(sizeof(grpc_tcp_server)));
   s->so_reuseport = has_so_reuseport;
   s->expand_wildcard_addrs = false;
   for (size_t i = 0; i < (args == nullptr ? 0 : args->num_args); i++) {
@@ -135,7 +136,7 @@ static void finish_shutdown(grpc_tcp_server* s) {
 }
 
 static void destroyed_port(void* server, grpc_error* error) {
-  grpc_tcp_server* s = (grpc_tcp_server*)server;
+  grpc_tcp_server* s = static_cast<grpc_tcp_server*>(server);
   gpr_mu_lock(&s->mu);
   s->destroyed_ports++;
   if (s->destroyed_ports == s->nports) {
@@ -194,15 +195,15 @@ static void tcp_server_destroy(grpc_tcp_server* s) {
 
 /* event manager callback when reads are ready */
 static void on_read(void* arg, grpc_error* err) {
-  grpc_tcp_listener* sp = (grpc_tcp_listener*)arg;
+  grpc_tcp_listener* sp = static_cast<grpc_tcp_listener*>(arg);
   grpc_pollset* read_notifier_pollset;
   if (err != GRPC_ERROR_NONE) {
     goto error;
   }
 
   read_notifier_pollset =
-      sp->server->pollsets[(size_t)gpr_atm_no_barrier_fetch_add(
-                               &sp->server->next_pollset_to_assign, 1) %
+      sp->server->pollsets[static_cast<size_t>(gpr_atm_no_barrier_fetch_add(
+                               &sp->server->next_pollset_to_assign, 1)) %
                            sp->server->pollset_count];
 
   /* loop until accept4 returns EAGAIN, and then re-arm notification */
@@ -249,7 +250,7 @@ static void on_read(void* arg, grpc_error* err) {
 
     // Create acceptor.
     grpc_tcp_server_acceptor* acceptor =
-        (grpc_tcp_server_acceptor*)gpr_malloc(sizeof(*acceptor));
+        static_cast<grpc_tcp_server_acceptor*>(gpr_malloc(sizeof(*acceptor)));
     acceptor->from_server = sp->server;
     acceptor->port_index = sp->port_index;
     acceptor->fd_index = sp->fd_index;
@@ -363,7 +364,7 @@ static grpc_error* clone_port(grpc_tcp_listener* listener, unsigned count) {
     listener->server->nports++;
     grpc_sockaddr_to_string(&addr_str, &listener->addr, 1);
     gpr_asprintf(&name, "tcp-server-listener:%s/clone-%d", addr_str, i);
-    sp = (grpc_tcp_listener*)gpr_malloc(sizeof(grpc_tcp_listener));
+    sp = static_cast<grpc_tcp_listener*>(gpr_malloc(sizeof(grpc_tcp_listener)));
     sp->next = listener->next;
     listener->next = sp;
     /* sp (the new listener) is a sibling of 'listener' (the original
@@ -410,8 +411,10 @@ grpc_error* grpc_tcp_server_add_port(grpc_tcp_server* s,
   if (requested_port == 0) {
     for (sp = s->head; sp; sp = sp->next) {
       sockname_temp.len = sizeof(struct sockaddr_storage);
-      if (0 == getsockname(sp->fd, (struct sockaddr*)&sockname_temp.addr,
-                           (socklen_t*)&sockname_temp.len)) {
+      if (0 ==
+          getsockname(sp->fd,
+                      reinterpret_cast<struct sockaddr*>(&sockname_temp.addr),
+                      reinterpret_cast<socklen_t*>(&sockname_temp.len))) {
         int used_port = grpc_sockaddr_get_port(&sockname_temp);
         if (used_port > 0) {
           memcpy(&sockname_temp, addr, sizeof(grpc_resolved_address));
diff --git a/src/core/lib/iomgr/tcp_server_utils_posix_common.cc b/src/core/lib/iomgr/tcp_server_utils_posix_common.cc
index 5139760634..be2a00a9dc 100644
--- a/src/core/lib/iomgr/tcp_server_utils_posix_common.cc
+++ b/src/core/lib/iomgr/tcp_server_utils_posix_common.cc
@@ -56,7 +56,7 @@ static void init_max_accept_queue_size(void) {
     char* end;
     long i = strtol(buf, &end, 10);
     if (i > 0 && i <= INT_MAX && end && *end == '\n') {
-      n = (int)i;
+      n = static_cast<int>(i);
     }
   }
   fclose(fp);
@@ -93,7 +93,7 @@ static grpc_error* add_socket_to_server(grpc_tcp_server* s, int fd,
     gpr_mu_lock(&s->mu);
     s->nports++;
     GPR_ASSERT(!s->on_accept_cb && "must add ports before starting server");
-    sp = (grpc_tcp_listener*)gpr_malloc(sizeof(grpc_tcp_listener));
+    sp = static_cast<grpc_tcp_listener*>(gpr_malloc(sizeof(grpc_tcp_listener)));
     sp->next = nullptr;
     if (s->head == nullptr) {
       s->head = sp;
@@ -169,7 +169,9 @@ grpc_error* grpc_tcp_server_prepare_socket(int fd,
   if (err != GRPC_ERROR_NONE) goto error;
 
   GPR_ASSERT(addr->len < ~(socklen_t)0);
-  if (bind(fd, (struct sockaddr*)addr->addr, (socklen_t)addr->len) < 0) {
+  if (bind(fd,
+           reinterpret_cast<struct sockaddr*>(const_cast<char*>(addr->addr)),
+           static_cast<socklen_t>(addr->len)) < 0) {
     err = GRPC_OS_ERROR(errno, "bind");
     goto error;
   }
@@ -181,8 +183,8 @@ grpc_error* grpc_tcp_server_prepare_socket(int fd,
 
   sockname_temp.len = sizeof(struct sockaddr_storage);
 
-  if (getsockname(fd, (struct sockaddr*)sockname_temp.addr,
-                  (socklen_t*)&sockname_temp.len) < 0) {
+  if (getsockname(fd, reinterpret_cast<struct sockaddr*>(sockname_temp.addr),
+                  reinterpret_cast<socklen_t*>(&sockname_temp.len)) < 0) {
     err = GRPC_OS_ERROR(errno, "getsockname");
     goto error;
   }
diff --git a/src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.cc b/src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.cc
index 227bf94aa7..612c2584bc 100644
--- a/src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.cc
+++ b/src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.cc
@@ -66,13 +66,14 @@ static grpc_error* get_unused_port(int* port) {
   if (dsmode == GRPC_DSMODE_IPV4) {
     grpc_sockaddr_make_wildcard4(0, &wild);
   }
-  if (bind(fd, (const struct sockaddr*)wild.addr, (socklen_t)wild.len) != 0) {
+  if (bind(fd, reinterpret_cast<const struct sockaddr*>(wild.addr),
+           static_cast<socklen_t>(wild.len)) != 0) {
     err = GRPC_OS_ERROR(errno, "bind");
     close(fd);
     return err;
   }
-  if (getsockname(fd, (struct sockaddr*)wild.addr, (socklen_t*)&wild.len) !=
-      0) {
+  if (getsockname(fd, reinterpret_cast<struct sockaddr*>(wild.addr),
+                  reinterpret_cast<socklen_t*>(&wild.len)) != 0) {
     err = GRPC_OS_ERROR(errno, "getsockname");
     close(fd);
     return err;
diff --git a/src/core/lib/iomgr/timer_generic.cc b/src/core/lib/iomgr/timer_generic.cc
index ef86d237d3..697162f7a8 100644
--- a/src/core/lib/iomgr/timer_generic.cc
+++ b/src/core/lib/iomgr/timer_generic.cc
@@ -240,9 +240,10 @@ void grpc_timer_list_init() {
   uint32_t i;
 
   g_num_shards = GPR_MIN(1, 2 * gpr_cpu_num_cores());
-  g_shards = (timer_shard*)gpr_zalloc(g_num_shards * sizeof(*g_shards));
-  g_shard_queue =
-      (timer_shard**)gpr_zalloc(g_num_shards * sizeof(*g_shard_queue));
+  g_shards =
+      static_cast<timer_shard*>(gpr_zalloc(g_num_shards * sizeof(*g_shards)));
+  g_shard_queue = static_cast<timer_shard**>(
+      gpr_zalloc(g_num_shards * sizeof(*g_shard_queue)));
 
   g_shared_mutables.initialized = true;
   g_shared_mutables.checker_mu = GPR_SPINLOCK_INITIALIZER;
@@ -359,8 +360,8 @@ void grpc_timer_init(grpc_timer* timer, grpc_millis deadline,
     return;
   }
 
-  grpc_time_averaged_stats_add_sample(&shard->stats,
-                                      (double)(deadline - now) / 1000.0);
+  grpc_time_averaged_stats_add_sample(
+      &shard->stats, static_cast<double>(deadline - now) / 1000.0);
 
   ADD_TO_HASH_TABLE(timer);
 
@@ -374,7 +375,7 @@ void grpc_timer_init(grpc_timer* timer, grpc_millis deadline,
     gpr_log(GPR_DEBUG,
             "  .. add to shard %d with queue_deadline_cap=%" PRIdPTR
             " => is_first_timer=%s",
-            (int)(shard - g_shards), shard->queue_deadline_cap,
+            static_cast<int>(shard - g_shards), shard->queue_deadline_cap,
             is_first_timer ? "true" : "false");
   }
   gpr_mu_unlock(&shard->mu);
@@ -461,11 +462,11 @@ static int refill_heap(timer_shard* shard, gpr_atm now) {
   /* Compute the new cap and put all timers under it into the queue: */
   shard->queue_deadline_cap =
       saturating_add(GPR_MAX(now, shard->queue_deadline_cap),
-                     (gpr_atm)(deadline_delta * 1000.0));
+                     static_cast<gpr_atm>(deadline_delta * 1000.0));
 
   if (grpc_timer_check_trace.enabled()) {
     gpr_log(GPR_DEBUG, "  .. shard[%d]->queue_deadline_cap --> %" PRIdPTR,
-            (int)(shard - g_shards), shard->queue_deadline_cap);
+            static_cast<int>(shard - g_shards), shard->queue_deadline_cap);
   }
   for (timer = shard->list.next; timer != &shard->list; timer = next) {
     next = timer->next;
@@ -490,7 +491,7 @@ static grpc_timer* pop_one(timer_shard* shard, gpr_atm now) {
   for (;;) {
     if (grpc_timer_check_trace.enabled()) {
       gpr_log(GPR_DEBUG, "  .. shard[%d]: heap_empty=%s",
-              (int)(shard - g_shards),
+              static_cast<int>(shard - g_shards),
               grpc_timer_heap_is_empty(&shard->heap) ? "true" : "false");
     }
     if (grpc_timer_heap_is_empty(&shard->heap)) {
@@ -530,7 +531,7 @@ static size_t pop_timers(timer_shard* shard, gpr_atm now,
   gpr_mu_unlock(&shard->mu);
   if (grpc_timer_check_trace.enabled()) {
     gpr_log(GPR_DEBUG, "  .. shard[%d] popped %" PRIdPTR,
-            (int)(shard - g_shards), n);
+            static_cast<int>(shard - g_shards), n);
   }
   return n;
 }
@@ -553,7 +554,7 @@ static grpc_timer_check_result run_some_expired_timers(gpr_atm now,
 
     if (grpc_timer_check_trace.enabled()) {
       gpr_log(GPR_DEBUG, "  .. shard[%d]->min_deadline = %" PRIdPTR,
-              (int)(g_shard_queue[0] - g_shards),
+              static_cast<int>(g_shard_queue[0] - g_shards),
               g_shard_queue[0]->min_deadline);
     }
 
@@ -573,7 +574,7 @@ static grpc_timer_check_result run_some_expired_timers(gpr_atm now,
                 "  .. result --> %d"
                 ", shard[%d]->min_deadline %" PRIdPTR " --> %" PRIdPTR
                 ", now=%" PRIdPTR,
-                result, (int)(g_shard_queue[0] - g_shards),
+                result, static_cast<int>(g_shard_queue[0] - g_shards),
                 g_shard_queue[0]->min_deadline, new_min_deadline, now);
       }
 
diff --git a/src/core/lib/iomgr/timer_heap.cc b/src/core/lib/iomgr/timer_heap.cc
index 632928fafa..c26896ee4a 100644
--- a/src/core/lib/iomgr/timer_heap.cc
+++ b/src/core/lib/iomgr/timer_heap.cc
@@ -35,7 +35,7 @@
    its argument. */
 static void adjust_upwards(grpc_timer** first, uint32_t i, grpc_timer* t) {
   while (i > 0) {
-    uint32_t parent = (uint32_t)(((int)i - 1) / 2);
+    uint32_t parent = static_cast<uint32_t>((static_cast<int>(i) - 1) / 2);
     if (first[parent]->deadline <= t->deadline) break;
     first[i] = first[parent];
     first[i]->heap_index = i;
@@ -74,14 +74,14 @@ static void maybe_shrink(grpc_timer_heap* heap) {
   if (heap->timer_count >= 8 &&
       heap->timer_count <= heap->timer_capacity / SHRINK_FULLNESS_FACTOR / 2) {
     heap->timer_capacity = heap->timer_count * SHRINK_FULLNESS_FACTOR;
-    heap->timers = (grpc_timer**)gpr_realloc(
-        heap->timers, heap->timer_capacity * sizeof(grpc_timer*));
+    heap->timers = static_cast<grpc_timer**>(
+        gpr_realloc(heap->timers, heap->timer_capacity * sizeof(grpc_timer*)));
   }
 }
 
 static void note_changed_priority(grpc_timer_heap* heap, grpc_timer* timer) {
   uint32_t i = timer->heap_index;
-  uint32_t parent = (uint32_t)(((int)i - 1) / 2);
+  uint32_t parent = static_cast<uint32_t>((static_cast<int>(i) - 1) / 2);
   if (heap->timers[parent]->deadline > timer->deadline) {
     adjust_upwards(heap->timers, i, timer);
   } else {
@@ -99,8 +99,8 @@ int grpc_timer_heap_add(grpc_timer_heap* heap, grpc_timer* timer) {
   if (heap->timer_count == heap->timer_capacity) {
     heap->timer_capacity =
         GPR_MAX(heap->timer_capacity + 1, heap->timer_capacity * 3 / 2);
-    heap->timers = (grpc_timer**)gpr_realloc(
-        heap->timers, heap->timer_capacity * sizeof(grpc_timer*));
+    heap->timers = static_cast<grpc_timer**>(
+        gpr_realloc(heap->timers, heap->timer_capacity * sizeof(grpc_timer*)));
   }
   timer->heap_index = heap->timer_count;
   adjust_upwards(heap->timers, heap->timer_count, timer);
diff --git a/src/core/lib/iomgr/timer_manager.cc b/src/core/lib/iomgr/timer_manager.cc
index 7fb068f10f..a528c22264 100644
--- a/src/core/lib/iomgr/timer_manager.cc
+++ b/src/core/lib/iomgr/timer_manager.cc
@@ -86,7 +86,8 @@ static void start_timer_thread_and_unlock(void) {
   }
   gpr_thd_options opt = gpr_thd_options_default();
   gpr_thd_options_set_joinable(&opt);
-  completed_thread* ct = (completed_thread*)gpr_malloc(sizeof(*ct));
+  completed_thread* ct =
+      static_cast<completed_thread*>(gpr_malloc(sizeof(*ct)));
   // The call to gpr_thd_new() has to be under the same lock used by
   // gc_completed_threads(), particularly due to ct->t, which is written here
   // (internally by gpr_thd_new) and read there. Otherwise it's possible for ct
@@ -276,7 +277,7 @@ static void timer_thread(void* completed_thread_ptr) {
   grpc_core::ExecCtx exec_ctx(0);
   timer_main_loop();
 
-  timer_thread_cleanup((completed_thread*)completed_thread_ptr);
+  timer_thread_cleanup(static_cast<completed_thread*>(completed_thread_ptr));
 }
 
 static void start_threads(void) {
diff --git a/src/core/lib/iomgr/udp_server.cc b/src/core/lib/iomgr/udp_server.cc
index 27d32c59ae..eecb3b09d9 100644
--- a/src/core/lib/iomgr/udp_server.cc
+++ b/src/core/lib/iomgr/udp_server.cc
@@ -132,14 +132,15 @@ static grpc_socket_factory* get_socket_factory(const grpc_channel_args* args) {
     const grpc_arg* arg = grpc_channel_args_find(args, GRPC_ARG_SOCKET_FACTORY);
     if (arg) {
       GPR_ASSERT(arg->type == GRPC_ARG_POINTER);
-      return (grpc_socket_factory*)arg->value.pointer.p;
+      return static_cast<grpc_socket_factory*>(arg->value.pointer.p);
     }
   }
   return nullptr;
 }
 
 grpc_udp_server* grpc_udp_server_create(const grpc_channel_args* args) {
-  grpc_udp_server* s = (grpc_udp_server*)gpr_malloc(sizeof(grpc_udp_server));
+  grpc_udp_server* s =
+      static_cast<grpc_udp_server*>(gpr_malloc(sizeof(grpc_udp_server)));
   gpr_mu_init(&s->mu);
   s->socket_factory = get_socket_factory(args);
   if (s->socket_factory) {
@@ -156,7 +157,8 @@ grpc_udp_server* grpc_udp_server_create(const grpc_channel_args* args) {
 }
 
 static void shutdown_fd(void* args, grpc_error* error) {
-  struct shutdown_fd_args* shutdown_args = (struct shutdown_fd_args*)args;
+  struct shutdown_fd_args* shutdown_args =
+      static_cast<struct shutdown_fd_args*>(args);
   grpc_udp_listener* sp = shutdown_args->sp;
   gpr_log(GPR_DEBUG, "shutdown fd %d", sp->fd);
   gpr_mu_lock(shutdown_args->server_mu);
@@ -198,7 +200,7 @@ static void finish_shutdown(grpc_udp_server* s) {
 }
 
 static void destroyed_port(void* server, grpc_error* error) {
-  grpc_udp_server* s = (grpc_udp_server*)server;
+  grpc_udp_server* s = static_cast<grpc_udp_server*>(server);
   gpr_mu_lock(&s->mu);
   s->destroyed_ports++;
   if (s->destroyed_ports == s->nports) {
@@ -260,7 +262,7 @@ void grpc_udp_server_destroy(grpc_udp_server* s, grpc_closure* on_done) {
     for (sp = s->head; sp; sp = sp->next) {
       GPR_ASSERT(sp->orphan_cb);
       struct shutdown_fd_args* args =
-          (struct shutdown_fd_args*)gpr_malloc(sizeof(*args));
+          static_cast<struct shutdown_fd_args*>(gpr_malloc(sizeof(*args)));
       args->sp = sp;
       args->server_mu = &s->mu;
       GRPC_CLOSURE_INIT(&sp->orphan_fd_closure, shutdown_fd, args,
@@ -279,7 +281,10 @@ static int bind_socket(grpc_socket_factory* socket_factory, int sockfd,
                        const grpc_resolved_address* addr) {
   return (socket_factory != nullptr)
              ? grpc_socket_factory_bind(socket_factory, sockfd, addr)
-             : bind(sockfd, (struct sockaddr*)addr->addr, (socklen_t)addr->len);
+             : bind(sockfd,
+                    reinterpret_cast<struct sockaddr*>(
+                        const_cast<char*>(addr->addr)),
+                    static_cast<socklen_t>(addr->len));
 }
 
 /* Prepare a recently-created socket for listening. */
@@ -287,7 +292,8 @@ static int prepare_socket(grpc_socket_factory* socket_factory, int fd,
                           const grpc_resolved_address* addr, int rcv_buf_size,
                           int snd_buf_size) {
   grpc_resolved_address sockname_temp;
-  struct sockaddr* addr_ptr = (struct sockaddr*)addr->addr;
+  struct sockaddr* addr_ptr =
+      reinterpret_cast<struct sockaddr*>(const_cast<char*>(addr->addr));
 
   if (fd < 0) {
     goto error;
@@ -323,8 +329,8 @@ static int prepare_socket(grpc_socket_factory* socket_factory, int fd,
 
   sockname_temp.len = sizeof(struct sockaddr_storage);
 
-  if (getsockname(fd, (struct sockaddr*)sockname_temp.addr,
-                  (socklen_t*)&sockname_temp.len) < 0) {
+  if (getsockname(fd, reinterpret_cast<struct sockaddr*>(sockname_temp.addr),
+                  reinterpret_cast<socklen_t*>(&sockname_temp.len)) < 0) {
     goto error;
   }
 
@@ -379,7 +385,7 @@ static void do_read(void* arg, grpc_error* error) {
 
 /* event manager callback when reads are ready */
 static void on_read(void* arg, grpc_error* error) {
-  grpc_udp_listener* sp = (grpc_udp_listener*)arg;
+  grpc_udp_listener* sp = static_cast<grpc_udp_listener*>(arg);
 
   gpr_mu_lock(&sp->server->mu);
   if (error != GRPC_ERROR_NONE) {
@@ -438,7 +444,7 @@ static void do_write(void* arg, grpc_error* error) {
 }
 
 static void on_write(void* arg, grpc_error* error) {
-  grpc_udp_listener* sp = (grpc_udp_listener*)arg;
+  grpc_udp_listener* sp = static_cast<grpc_udp_listener*>(arg);
 
   gpr_mu_lock(&sp->server->mu);
   if (error != GRPC_ERROR_NONE) {
@@ -479,7 +485,7 @@ static int add_socket_to_server(grpc_udp_server* s, int fd,
     gpr_free(addr_str);
     gpr_mu_lock(&s->mu);
     s->nports++;
-    sp = (grpc_udp_listener*)gpr_malloc(sizeof(grpc_udp_listener));
+    sp = static_cast<grpc_udp_listener*>(gpr_malloc(sizeof(grpc_udp_listener)));
     sp->next = nullptr;
     if (s->head == nullptr) {
       s->head = sp;
@@ -530,12 +536,14 @@ int grpc_udp_server_add_port(grpc_udp_server* s,
   if (grpc_sockaddr_get_port(addr) == 0) {
     for (sp = s->head; sp; sp = sp->next) {
       sockname_temp.len = sizeof(struct sockaddr_storage);
-      if (0 == getsockname(sp->fd, (struct sockaddr*)sockname_temp.addr,
-                           (socklen_t*)&sockname_temp.len)) {
+      if (0 ==
+          getsockname(sp->fd,
+                      reinterpret_cast<struct sockaddr*>(sockname_temp.addr),
+                      reinterpret_cast<socklen_t*>(&sockname_temp.len))) {
         port = grpc_sockaddr_get_port(&sockname_temp);
         if (port > 0) {
-          allocated_addr =
-              (grpc_resolved_address*)gpr_malloc(sizeof(grpc_resolved_address));
+          allocated_addr = static_cast<grpc_resolved_address*>(
+              gpr_malloc(sizeof(grpc_resolved_address)));
           memcpy(allocated_addr, addr, sizeof(grpc_resolved_address));
           grpc_sockaddr_set_port(allocated_addr, port);
           addr = allocated_addr;
diff --git a/src/core/lib/iomgr/unix_sockets_posix.cc b/src/core/lib/iomgr/unix_sockets_posix.cc
index 91b7cb1e59..b603916c47 100644
--- a/src/core/lib/iomgr/unix_sockets_posix.cc
+++ b/src/core/lib/iomgr/unix_sockets_posix.cc
@@ -51,12 +51,12 @@ grpc_error* grpc_resolve_unix_domain_address(const char* name,
     gpr_free(err_msg);
     return err;
   }
-  *addrs =
-      (grpc_resolved_addresses*)gpr_malloc(sizeof(grpc_resolved_addresses));
+  *addrs = static_cast<grpc_resolved_addresses*>(
+      gpr_malloc(sizeof(grpc_resolved_addresses)));
   (*addrs)->naddrs = 1;
-  (*addrs)->addrs =
-      (grpc_resolved_address*)gpr_malloc(sizeof(grpc_resolved_address));
-  un = (struct sockaddr_un*)(*addrs)->addrs->addr;
+  (*addrs)->addrs = static_cast<grpc_resolved_address*>(
+      gpr_malloc(sizeof(grpc_resolved_address)));
+  un = reinterpret_cast<struct sockaddr_un*>((*addrs)->addrs->addr);
   un->sun_family = AF_UNIX;
   strncpy(un->sun_path, name, sizeof(un->sun_path));
   (*addrs)->addrs->len = strlen(un->sun_path) + sizeof(un->sun_family) + 1;
@@ -64,17 +64,20 @@ grpc_error* grpc_resolve_unix_domain_address(const char* name,
 }
 
 int grpc_is_unix_socket(const grpc_resolved_address* resolved_addr) {
-  const struct sockaddr* addr = (const struct sockaddr*)resolved_addr->addr;
+  const struct sockaddr* addr =
+      reinterpret_cast<const struct sockaddr*>(resolved_addr->addr);
   return addr->sa_family == AF_UNIX;
 }
 
 void grpc_unlink_if_unix_domain_socket(
     const grpc_resolved_address* resolved_addr) {
-  const struct sockaddr* addr = (const struct sockaddr*)resolved_addr->addr;
+  const struct sockaddr* addr =
+      reinterpret_cast<const struct sockaddr*>(resolved_addr->addr);
   if (addr->sa_family != AF_UNIX) {
     return;
   }
-  struct sockaddr_un* un = (struct sockaddr_un*)resolved_addr->addr;
+  struct sockaddr_un* un = reinterpret_cast<struct sockaddr_un*>(
+      const_cast<char*>(resolved_addr->addr));
   struct stat st;
 
   if (stat(un->sun_path, &st) == 0 && (st.st_mode & S_IFMT) == S_IFSOCK) {
@@ -84,7 +87,8 @@ void grpc_unlink_if_unix_domain_socket(
 
 char* grpc_sockaddr_to_uri_unix_if_possible(
     const grpc_resolved_address* resolved_addr) {
-  const struct sockaddr* addr = (const struct sockaddr*)resolved_addr->addr;
+  const struct sockaddr* addr =
+      reinterpret_cast<const struct sockaddr*>(resolved_addr->addr);
   if (addr->sa_family != AF_UNIX) {
     return nullptr;
   }
diff --git a/src/core/lib/iomgr/wakeup_fd_cv.cc b/src/core/lib/iomgr/wakeup_fd_cv.cc
index 4818cafe3d..59718243e0 100644
--- a/src/core/lib/iomgr/wakeup_fd_cv.cc
+++ b/src/core/lib/iomgr/wakeup_fd_cv.cc
@@ -43,8 +43,8 @@ static grpc_error* cv_fd_init(grpc_wakeup_fd* fd_info) {
   gpr_mu_lock(&g_cvfds.mu);
   if (!g_cvfds.free_fds) {
     newsize = GPR_MIN(g_cvfds.size * 2, g_cvfds.size + MAX_TABLE_RESIZE);
-    g_cvfds.cvfds = (grpc_fd_node*)gpr_realloc(g_cvfds.cvfds,
-                                               sizeof(grpc_fd_node) * newsize);
+    g_cvfds.cvfds = static_cast<grpc_fd_node*>(
+        gpr_realloc(g_cvfds.cvfds, sizeof(grpc_fd_node) * newsize));
     for (i = g_cvfds.size; i < newsize; i++) {
       g_cvfds.cvfds[i].is_set = 0;
       g_cvfds.cvfds[i].cvs = nullptr;
@@ -54,7 +54,7 @@ static grpc_error* cv_fd_init(grpc_wakeup_fd* fd_info) {
     g_cvfds.size = newsize;
   }
 
-  idx = (int)(g_cvfds.free_fds - g_cvfds.cvfds);
+  idx = static_cast<int>(g_cvfds.free_fds - g_cvfds.cvfds);
   g_cvfds.free_fds = g_cvfds.free_fds->next_free;
   g_cvfds.cvfds[idx].cvs = nullptr;
   g_cvfds.cvfds[idx].is_set = 0;
diff --git a/src/core/lib/json/json.cc b/src/core/lib/json/json.cc
index 4ad51f662a..adf35b9088 100644
--- a/src/core/lib/json/json.cc
+++ b/src/core/lib/json/json.cc
@@ -23,7 +23,7 @@
 #include "src/core/lib/json/json.h"
 
 grpc_json* grpc_json_create(grpc_json_type type) {
-  grpc_json* json = (grpc_json*)gpr_zalloc(sizeof(*json));
+  grpc_json* json = static_cast<grpc_json*>(gpr_zalloc(sizeof(*json)));
   json->type = type;
 
   return json;
diff --git a/src/core/lib/json/json_reader.cc b/src/core/lib/json/json_reader.cc
index 30039419b1..6dadea5006 100644
--- a/src/core/lib/json/json_reader.cc
+++ b/src/core/lib/json/json_reader.cc
@@ -138,7 +138,7 @@ grpc_json_reader_status grpc_json_reader_run(grpc_json_reader* reader) {
           case GRPC_JSON_STATE_VALUE_NUMBER_WITH_DECIMAL:
           case GRPC_JSON_STATE_VALUE_NUMBER_ZERO:
           case GRPC_JSON_STATE_VALUE_NUMBER_EPM:
-            success = (uint32_t)json_reader_set_number(reader);
+            success = static_cast<uint32_t>(json_reader_set_number(reader));
             if (!success) return GRPC_JSON_PARSE_ERROR;
             json_reader_string_clear(reader);
             reader->state = GRPC_JSON_STATE_VALUE_END;
@@ -173,7 +173,7 @@ grpc_json_reader_status grpc_json_reader_run(grpc_json_reader* reader) {
             } else if ((c == ']') && !reader->in_array) {
               return GRPC_JSON_PARSE_ERROR;
             }
-            success = (uint32_t)json_reader_set_number(reader);
+            success = static_cast<uint32_t>(json_reader_set_number(reader));
             if (!success) return GRPC_JSON_PARSE_ERROR;
             json_reader_string_clear(reader);
             reader->state = GRPC_JSON_STATE_VALUE_END;
@@ -417,8 +417,10 @@ grpc_json_reader_status grpc_json_reader_run(grpc_json_reader* reader) {
             } else {
               return GRPC_JSON_PARSE_ERROR;
             }
-            reader->unicode_char = (uint16_t)(reader->unicode_char << 4);
-            reader->unicode_char = (uint16_t)(reader->unicode_char | c);
+            reader->unicode_char =
+                static_cast<uint16_t>(reader->unicode_char << 4);
+            reader->unicode_char =
+                static_cast<uint16_t>(reader->unicode_char | c);
 
             switch (reader->state) {
               case GRPC_JSON_STATE_STRING_ESCAPE_U1:
@@ -445,9 +447,9 @@ grpc_json_reader_status grpc_json_reader_run(grpc_json_reader* reader) {
                   if (reader->unicode_high_surrogate == 0)
                     return GRPC_JSON_PARSE_ERROR;
                   utf32 = 0x10000;
-                  utf32 += (uint32_t)(
+                  utf32 += static_cast<uint32_t>(
                       (reader->unicode_high_surrogate - 0xd800) * 0x400);
-                  utf32 += (uint32_t)(reader->unicode_char - 0xdc00);
+                  utf32 += static_cast<uint32_t>(reader->unicode_char - 0xdc00);
                   json_reader_string_add_utf32(reader, utf32);
                   reader->unicode_high_surrogate = 0;
                 } else {
diff --git a/src/core/lib/json/json_string.cc b/src/core/lib/json/json_string.cc
index a339eec81b..8200900956 100644
--- a/src/core/lib/json/json_string.cc
+++ b/src/core/lib/json/json_string.cc
@@ -63,19 +63,20 @@ typedef struct {
  * bytes at a time (or multiples thereof).
  */
 static void json_writer_output_check(void* userdata, size_t needed) {
-  json_writer_userdata* state = (json_writer_userdata*)userdata;
+  json_writer_userdata* state = static_cast<json_writer_userdata*>(userdata);
   if (state->free_space >= needed) return;
   needed -= state->free_space;
   /* Round up by 256 bytes. */
   needed = (needed + 0xff) & ~0xffU;
-  state->output = (char*)gpr_realloc(state->output, state->allocated + needed);
+  state->output =
+      static_cast<char*>(gpr_realloc(state->output, state->allocated + needed));
   state->free_space += needed;
   state->allocated += needed;
 }
 
 /* These are needed by the writer's implementation. */
 static void json_writer_output_char(void* userdata, char c) {
-  json_writer_userdata* state = (json_writer_userdata*)userdata;
+  json_writer_userdata* state = static_cast<json_writer_userdata*>(userdata);
   json_writer_output_check(userdata, 1);
   state->output[state->string_len++] = c;
   state->free_space--;
@@ -83,7 +84,7 @@ static void json_writer_output_char(void* userdata, char c) {
 
 static void json_writer_output_string_with_len(void* userdata, const char* str,
                                                size_t len) {
-  json_writer_userdata* state = (json_writer_userdata*)userdata;
+  json_writer_userdata* state = static_cast<json_writer_userdata*>(userdata);
   json_writer_output_check(userdata, len);
   memcpy(state->output + state->string_len, str, len);
   state->string_len += len;
@@ -99,7 +100,7 @@ static void json_writer_output_string(void* userdata, const char* str) {
  * the end of the current string, and advance our output pointer.
  */
 static void json_reader_string_clear(void* userdata) {
-  json_reader_userdata* state = (json_reader_userdata*)userdata;
+  json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata);
   if (state->string) {
     GPR_ASSERT(state->string_ptr < state->input);
     *state->string_ptr++ = 0;
@@ -108,10 +109,10 @@ static void json_reader_string_clear(void* userdata) {
 }
 
 static void json_reader_string_add_char(void* userdata, uint32_t c) {
-  json_reader_userdata* state = (json_reader_userdata*)userdata;
+  json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata);
   GPR_ASSERT(state->string_ptr < state->input);
   GPR_ASSERT(c <= 0xff);
-  *state->string_ptr++ = (uint8_t)c;
+  *state->string_ptr++ = static_cast<uint8_t>(c);
 }
 
 /* We are converting a UTF-32 character into UTF-8 here,
@@ -149,7 +150,7 @@ static void json_reader_string_add_utf32(void* userdata, uint32_t c) {
  */
 static uint32_t json_reader_read_char(void* userdata) {
   uint32_t r;
-  json_reader_userdata* state = (json_reader_userdata*)userdata;
+  json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata);
 
   if (state->remaining_input == 0) return GRPC_JSON_READ_CHAR_EOF;
 
@@ -168,7 +169,7 @@ static uint32_t json_reader_read_char(void* userdata) {
  * our tree-in-progress inside our opaque structure.
  */
 static grpc_json* json_create_and_link(void* userdata, grpc_json_type type) {
-  json_reader_userdata* state = (json_reader_userdata*)userdata;
+  json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata);
   grpc_json* json = grpc_json_create(type);
 
   json->parent = state->current_container;
@@ -183,7 +184,7 @@ static grpc_json* json_create_and_link(void* userdata, grpc_json_type type) {
       json->parent->child = json;
     }
     if (json->parent->type == GRPC_JSON_OBJECT) {
-      json->key = (char*)state->key;
+      json->key = reinterpret_cast<char*>(state->key);
     }
   }
   if (!state->top) {
@@ -194,7 +195,7 @@ static grpc_json* json_create_and_link(void* userdata, grpc_json_type type) {
 }
 
 static void json_reader_container_begins(void* userdata, grpc_json_type type) {
-  json_reader_userdata* state = (json_reader_userdata*)userdata;
+  json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata);
   grpc_json* container;
 
   GPR_ASSERT(type == GRPC_JSON_ARRAY || type == GRPC_JSON_OBJECT);
@@ -215,7 +216,7 @@ static void json_reader_container_begins(void* userdata, grpc_json_type type) {
  */
 static grpc_json_type json_reader_container_ends(void* userdata) {
   grpc_json_type container_type = GRPC_JSON_TOP_LEVEL;
-  json_reader_userdata* state = (json_reader_userdata*)userdata;
+  json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata);
 
   GPR_ASSERT(state->current_container);
 
@@ -236,20 +237,20 @@ static grpc_json_type json_reader_container_ends(void* userdata) {
  * We'll keep it as a string, and leave it to the caller to evaluate it.
  */
 static void json_reader_set_key(void* userdata) {
-  json_reader_userdata* state = (json_reader_userdata*)userdata;
+  json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata);
   state->key = state->string;
 }
 
 static void json_reader_set_string(void* userdata) {
-  json_reader_userdata* state = (json_reader_userdata*)userdata;
+  json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata);
   grpc_json* json = json_create_and_link(userdata, GRPC_JSON_STRING);
-  json->value = (char*)state->string;
+  json->value = reinterpret_cast<char*>(state->string);
 }
 
 static int json_reader_set_number(void* userdata) {
-  json_reader_userdata* state = (json_reader_userdata*)userdata;
+  json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata);
   grpc_json* json = json_create_and_link(userdata, GRPC_JSON_NUMBER);
-  json->value = (char*)state->string;
+  json->value = reinterpret_cast<char*>(state->string);
   return 1;
 }
 
@@ -287,7 +288,7 @@ grpc_json* grpc_json_parse_string_with_len(char* input, size_t size) {
 
   state.top = state.current_container = state.current_value = nullptr;
   state.string = state.key = nullptr;
-  state.string_ptr = state.input = (uint8_t*)input;
+  state.string_ptr = state.input = reinterpret_cast<uint8_t*>(input);
   state.remaining_input = size;
   grpc_json_reader_init(&reader, &reader_vtable, &state);
 
diff --git a/src/core/lib/json/json_writer.cc b/src/core/lib/json/json_writer.cc
index 0b9c7c30ea..6d442b8716 100644
--- a/src/core/lib/json/json_writer.cc
+++ b/src/core/lib/json/json_writer.cc
@@ -52,7 +52,7 @@ static void json_writer_output_indent(grpc_json_writer* writer) {
       "                "
       "                ";
 
-  unsigned spaces = (unsigned)(writer->depth * writer->indent);
+  unsigned spaces = static_cast<unsigned>(writer->depth * writer->indent);
 
   if (writer->indent == 0) return;
 
@@ -64,7 +64,7 @@ static void json_writer_output_indent(grpc_json_writer* writer) {
   while (spaces >= (sizeof(spacesstr) - 1)) {
     json_writer_output_string_with_len(writer, spacesstr,
                                        sizeof(spacesstr) - 1);
-    spaces -= (unsigned)(sizeof(spacesstr) - 1);
+    spaces -= static_cast<unsigned>(sizeof(spacesstr) - 1);
   }
 
   if (spaces == 0) return;
@@ -100,12 +100,12 @@ static void json_writer_escape_string(grpc_json_writer* writer,
   json_writer_output_char(writer, '"');
 
   for (;;) {
-    uint8_t c = (uint8_t)*string++;
+    uint8_t c = static_cast<uint8_t>(*string++);
     if (c == 0) {
       break;
     } else if ((c >= 32) && (c <= 126)) {
       if ((c == '\\') || (c == '"')) json_writer_output_char(writer, '\\');
-      json_writer_output_char(writer, (char)c);
+      json_writer_output_char(writer, static_cast<char>(c));
     } else if ((c < 32) || (c == 127)) {
       switch (c) {
         case '\b':
@@ -146,7 +146,7 @@ static void json_writer_escape_string(grpc_json_writer* writer,
       }
       for (i = 0; i < extra; i++) {
         utf32 <<= 6;
-        c = (uint8_t)(*string++);
+        c = static_cast<uint8_t>(*string++);
         /* Breaks out and bail on any invalid UTF-8 sequence, including \0. */
         if ((c & 0xc0) != 0x80) {
           valid = 0;
@@ -179,10 +179,12 @@ static void json_writer_escape_string(grpc_json_writer* writer,
          * That range is exactly 20 bits.
          */
         utf32 -= 0x10000;
-        json_writer_escape_utf16(writer, (uint16_t)(0xd800 | (utf32 >> 10)));
-        json_writer_escape_utf16(writer, (uint16_t)(0xdc00 | (utf32 & 0x3ff)));
+        json_writer_escape_utf16(writer,
+                                 static_cast<uint16_t>(0xd800 | (utf32 >> 10)));
+        json_writer_escape_utf16(
+            writer, static_cast<uint16_t>(0xdc00 | (utf32 & 0x3ff)));
       } else {
-        json_writer_escape_utf16(writer, (uint16_t)utf32);
+        json_writer_escape_utf16(writer, static_cast<uint16_t>(utf32));
       }
     }
   }
diff --git a/src/core/lib/security/context/security_context.cc b/src/core/lib/security/context/security_context.cc
index 63ec42cf86..c7e212bb21 100644
--- a/src/core/lib/security/context/security_context.cc
+++ b/src/core/lib/security/context/security_context.cc
@@ -44,8 +44,8 @@ grpc_call_error grpc_call_set_credentials(grpc_call* call,
     gpr_log(GPR_ERROR, "Method is client-side only.");
     return GRPC_CALL_ERROR_NOT_ON_SERVER;
   }
-  ctx = (grpc_client_security_context*)grpc_call_context_get(
-      call, GRPC_CONTEXT_SECURITY);
+  ctx = static_cast<grpc_client_security_context*>(
+      grpc_call_context_get(call, GRPC_CONTEXT_SECURITY));
   if (ctx == nullptr) {
     ctx = grpc_client_security_context_create();
     ctx->creds = grpc_call_credentials_ref(creds);
@@ -80,13 +80,14 @@ void grpc_auth_context_release(grpc_auth_context* context) {
 /* --- grpc_client_security_context --- */
 
 grpc_client_security_context* grpc_client_security_context_create(void) {
-  return (grpc_client_security_context*)gpr_zalloc(
-      sizeof(grpc_client_security_context));
+  return static_cast<grpc_client_security_context*>(
+      gpr_zalloc(sizeof(grpc_client_security_context)));
 }
 
 void grpc_client_security_context_destroy(void* ctx) {
   grpc_core::ExecCtx exec_ctx;
-  grpc_client_security_context* c = (grpc_client_security_context*)ctx;
+  grpc_client_security_context* c =
+      static_cast<grpc_client_security_context*>(ctx);
   grpc_call_credentials_unref(c->creds);
   GRPC_AUTH_CONTEXT_UNREF(c->auth_context, "client_security_context");
   if (c->extension.instance != nullptr && c->extension.destroy != nullptr) {
@@ -98,12 +99,13 @@ void grpc_client_security_context_destroy(void* ctx) {
 /* --- grpc_server_security_context --- */
 
 grpc_server_security_context* grpc_server_security_context_create(void) {
-  return (grpc_server_security_context*)gpr_zalloc(
-      sizeof(grpc_server_security_context));
+  return static_cast<grpc_server_security_context*>(
+      gpr_zalloc(sizeof(grpc_server_security_context)));
 }
 
 void grpc_server_security_context_destroy(void* ctx) {
-  grpc_server_security_context* c = (grpc_server_security_context*)ctx;
+  grpc_server_security_context* c =
+      static_cast<grpc_server_security_context*>(ctx);
   GRPC_AUTH_CONTEXT_UNREF(c->auth_context, "server_security_context");
   if (c->extension.instance != nullptr && c->extension.destroy != nullptr) {
     c->extension.destroy(c->extension.instance);
@@ -117,7 +119,7 @@ static grpc_auth_property_iterator empty_iterator = {nullptr, 0, nullptr};
 
 grpc_auth_context* grpc_auth_context_create(grpc_auth_context* chained) {
   grpc_auth_context* ctx =
-      (grpc_auth_context*)gpr_zalloc(sizeof(grpc_auth_context));
+      static_cast<grpc_auth_context*>(gpr_zalloc(sizeof(grpc_auth_context)));
   gpr_ref_init(&ctx->refcount, 1);
   if (chained != nullptr) {
     ctx->chained = GRPC_AUTH_CONTEXT_REF(chained, "chained");
@@ -258,9 +260,9 @@ static void ensure_auth_context_capacity(grpc_auth_context* ctx) {
   if (ctx->properties.count == ctx->properties.capacity) {
     ctx->properties.capacity =
         GPR_MAX(ctx->properties.capacity + 8, ctx->properties.capacity * 2);
-    ctx->properties.array = (grpc_auth_property*)gpr_realloc(
-        ctx->properties.array,
-        ctx->properties.capacity * sizeof(grpc_auth_property));
+    ctx->properties.array = static_cast<grpc_auth_property*>(
+        gpr_realloc(ctx->properties.array,
+                    ctx->properties.capacity * sizeof(grpc_auth_property)));
   }
 }
 
@@ -276,7 +278,7 @@ void grpc_auth_context_add_property(grpc_auth_context* ctx, const char* name,
   ensure_auth_context_capacity(ctx);
   prop = &ctx->properties.array[ctx->properties.count++];
   prop->name = gpr_strdup(name);
-  prop->value = (char*)gpr_malloc(value_length + 1);
+  prop->value = static_cast<char*>(gpr_malloc(value_length + 1));
   memcpy(prop->value, value, value_length);
   prop->value[value_length] = '\0';
   prop->value_length = value_length;
@@ -329,7 +331,7 @@ grpc_auth_context* grpc_auth_context_from_arg(const grpc_arg* arg) {
             GRPC_AUTH_CONTEXT_ARG);
     return nullptr;
   }
-  return (grpc_auth_context*)arg->value.pointer.p;
+  return static_cast<grpc_auth_context*>(arg->value.pointer.p);
 }
 
 grpc_auth_context* grpc_find_auth_context_in_args(
diff --git a/src/core/lib/security/credentials/composite/composite_credentials.cc b/src/core/lib/security/credentials/composite/composite_credentials.cc
index e4c1604795..ea2c4e208f 100644
--- a/src/core/lib/security/credentials/composite/composite_credentials.cc
+++ b/src/core/lib/security/credentials/composite/composite_credentials.cc
@@ -40,7 +40,8 @@ typedef struct {
 } grpc_composite_call_credentials_metadata_context;
 
 static void composite_call_destruct(grpc_call_credentials* creds) {
-  grpc_composite_call_credentials* c = (grpc_composite_call_credentials*)creds;
+  grpc_composite_call_credentials* c =
+      reinterpret_cast<grpc_composite_call_credentials*>(creds);
   for (size_t i = 0; i < c->inner.num_creds; i++) {
     grpc_call_credentials_unref(c->inner.creds_array[i]);
   }
@@ -49,7 +50,7 @@ static void composite_call_destruct(grpc_call_credentials* creds) {
 
 static void composite_call_metadata_cb(void* arg, grpc_error* error) {
   grpc_composite_call_credentials_metadata_context* ctx =
-      (grpc_composite_call_credentials_metadata_context*)arg;
+      static_cast<grpc_composite_call_credentials_metadata_context*>(arg);
   if (error == GRPC_ERROR_NONE) {
     /* See if we need to get some more metadata. */
     if (ctx->creds_index < ctx->composite_creds->inner.num_creds) {
@@ -75,10 +76,11 @@ static bool composite_call_get_request_metadata(
     grpc_auth_metadata_context auth_md_context,
     grpc_credentials_mdelem_array* md_array, grpc_closure* on_request_metadata,
     grpc_error** error) {
-  grpc_composite_call_credentials* c = (grpc_composite_call_credentials*)creds;
+  grpc_composite_call_credentials* c =
+      reinterpret_cast<grpc_composite_call_credentials*>(creds);
   grpc_composite_call_credentials_metadata_context* ctx;
-  ctx = (grpc_composite_call_credentials_metadata_context*)gpr_zalloc(
-      sizeof(grpc_composite_call_credentials_metadata_context));
+  ctx = static_cast<grpc_composite_call_credentials_metadata_context*>(
+      gpr_zalloc(sizeof(grpc_composite_call_credentials_metadata_context)));
   ctx->composite_creds = c;
   ctx->pollent = pollent;
   ctx->auth_md_context = auth_md_context;
@@ -106,7 +108,8 @@ static bool composite_call_get_request_metadata(
 static void composite_call_cancel_get_request_metadata(
     grpc_call_credentials* creds, grpc_credentials_mdelem_array* md_array,
     grpc_error* error) {
-  grpc_composite_call_credentials* c = (grpc_composite_call_credentials*)creds;
+  grpc_composite_call_credentials* c =
+      reinterpret_cast<grpc_composite_call_credentials*>(creds);
   for (size_t i = 0; i < c->inner.num_creds; ++i) {
     grpc_call_credentials_cancel_get_request_metadata(
         c->inner.creds_array[i], md_array, GRPC_ERROR_REF(error));
@@ -145,8 +148,8 @@ grpc_call_credentials* grpc_composite_call_credentials_create(
   GPR_ASSERT(reserved == nullptr);
   GPR_ASSERT(creds1 != nullptr);
   GPR_ASSERT(creds2 != nullptr);
-  c = (grpc_composite_call_credentials*)gpr_zalloc(
-      sizeof(grpc_composite_call_credentials));
+  c = static_cast<grpc_composite_call_credentials*>(
+      gpr_zalloc(sizeof(grpc_composite_call_credentials)));
   c->base.type = GRPC_CALL_CREDENTIALS_TYPE_COMPOSITE;
   c->base.vtable = &composite_call_credentials_vtable;
   gpr_ref_init(&c->base.refcount, 1);
@@ -155,7 +158,7 @@ grpc_call_credentials* grpc_composite_call_credentials_create(
   c->inner.num_creds = creds1_array.num_creds + creds2_array.num_creds;
   creds_array_byte_size = c->inner.num_creds * sizeof(grpc_call_credentials*);
   c->inner.creds_array =
-      (grpc_call_credentials**)gpr_zalloc(creds_array_byte_size);
+      static_cast<grpc_call_credentials**>(gpr_zalloc(creds_array_byte_size));
   for (i = 0; i < creds1_array.num_creds; i++) {
     grpc_call_credentials* cur_creds = creds1_array.creds_array[i];
     c->inner.creds_array[i] = grpc_call_credentials_ref(cur_creds);
@@ -171,7 +174,7 @@ grpc_call_credentials* grpc_composite_call_credentials_create(
 const grpc_call_credentials_array*
 grpc_composite_call_credentials_get_credentials(grpc_call_credentials* creds) {
   const grpc_composite_call_credentials* c =
-      (const grpc_composite_call_credentials*)creds;
+      reinterpret_cast<const grpc_composite_call_credentials*>(creds);
   GPR_ASSERT(strcmp(creds->type, GRPC_CALL_CREDENTIALS_TYPE_COMPOSITE) == 0);
   return &c->inner;
 }
@@ -200,7 +203,7 @@ grpc_call_credentials* grpc_credentials_contains_type(
 
 static void composite_channel_destruct(grpc_channel_credentials* creds) {
   grpc_composite_channel_credentials* c =
-      (grpc_composite_channel_credentials*)creds;
+      reinterpret_cast<grpc_composite_channel_credentials*>(creds);
   grpc_channel_credentials_unref(c->inner_creds);
   grpc_call_credentials_unref(c->call_creds);
 }
@@ -210,7 +213,7 @@ static grpc_security_status composite_channel_create_security_connector(
     const char* target, const grpc_channel_args* args,
     grpc_channel_security_connector** sc, grpc_channel_args** new_args) {
   grpc_composite_channel_credentials* c =
-      (grpc_composite_channel_credentials*)creds;
+      reinterpret_cast<grpc_composite_channel_credentials*>(creds);
   grpc_security_status status = GRPC_SECURITY_ERROR;
 
   GPR_ASSERT(c->inner_creds != nullptr && c->call_creds != nullptr &&
@@ -236,7 +239,7 @@ static grpc_channel_credentials*
 composite_channel_duplicate_without_call_credentials(
     grpc_channel_credentials* creds) {
   grpc_composite_channel_credentials* c =
-      (grpc_composite_channel_credentials*)creds;
+      reinterpret_cast<grpc_composite_channel_credentials*>(creds);
   return grpc_channel_credentials_ref(c->inner_creds);
 }
 
@@ -248,7 +251,7 @@ grpc_channel_credentials* grpc_composite_channel_credentials_create(
     grpc_channel_credentials* channel_creds, grpc_call_credentials* call_creds,
     void* reserved) {
   grpc_composite_channel_credentials* c =
-      (grpc_composite_channel_credentials*)gpr_zalloc(sizeof(*c));
+      static_cast<grpc_composite_channel_credentials*>(gpr_zalloc(sizeof(*c)));
   GPR_ASSERT(channel_creds != nullptr && call_creds != nullptr &&
              reserved == nullptr);
   GRPC_API_TRACE(
diff --git a/src/core/lib/security/credentials/credentials.cc b/src/core/lib/security/credentials/credentials.cc
index 009a5ce4ec..17f7de58be 100644
--- a/src/core/lib/security/credentials/credentials.cc
+++ b/src/core/lib/security/credentials/credentials.cc
@@ -40,8 +40,8 @@
 grpc_credentials_metadata_request* grpc_credentials_metadata_request_create(
     grpc_call_credentials* creds) {
   grpc_credentials_metadata_request* r =
-      (grpc_credentials_metadata_request*)gpr_zalloc(
-          sizeof(grpc_credentials_metadata_request));
+      static_cast<grpc_credentials_metadata_request*>(
+          gpr_zalloc(sizeof(grpc_credentials_metadata_request)));
   r->creds = grpc_call_credentials_ref(creds);
   return r;
 }
@@ -145,11 +145,12 @@ grpc_channel_credentials_duplicate_without_call_credentials(
 }
 
 static void credentials_pointer_arg_destroy(void* p) {
-  grpc_channel_credentials_unref((grpc_channel_credentials*)p);
+  grpc_channel_credentials_unref(static_cast<grpc_channel_credentials*>(p));
 }
 
 static void* credentials_pointer_arg_copy(void* p) {
-  return grpc_channel_credentials_ref((grpc_channel_credentials*)p);
+  return grpc_channel_credentials_ref(
+      static_cast<grpc_channel_credentials*>(p));
 }
 
 static int credentials_pointer_cmp(void* a, void* b) { return GPR_ICMP(a, b); }
@@ -173,7 +174,7 @@ grpc_channel_credentials* grpc_channel_credentials_from_arg(
             GRPC_ARG_CHANNEL_CREDENTIALS);
     return nullptr;
   }
-  return (grpc_channel_credentials*)arg->value.pointer.p;
+  return static_cast<grpc_channel_credentials*>(arg->value.pointer.p);
 }
 
 grpc_channel_credentials* grpc_channel_credentials_find_in_args(
@@ -240,11 +241,11 @@ void grpc_server_credentials_set_auth_metadata_processor(
 }
 
 static void server_credentials_pointer_arg_destroy(void* p) {
-  grpc_server_credentials_unref((grpc_server_credentials*)p);
+  grpc_server_credentials_unref(static_cast<grpc_server_credentials*>(p));
 }
 
 static void* server_credentials_pointer_arg_copy(void* p) {
-  return grpc_server_credentials_ref((grpc_server_credentials*)p);
+  return grpc_server_credentials_ref(static_cast<grpc_server_credentials*>(p));
 }
 
 static int server_credentials_pointer_cmp(void* a, void* b) {
@@ -267,7 +268,7 @@ grpc_server_credentials* grpc_server_credentials_from_arg(const grpc_arg* arg) {
             GRPC_SERVER_CREDENTIALS_ARG);
     return nullptr;
   }
-  return (grpc_server_credentials*)arg->value.pointer.p;
+  return static_cast<grpc_server_credentials*>(arg->value.pointer.p);
 }
 
 grpc_server_credentials* grpc_find_server_credentials_in_args(
diff --git a/src/core/lib/security/credentials/credentials_metadata.cc b/src/core/lib/security/credentials/credentials_metadata.cc
index 9ceaf21139..250e384155 100644
--- a/src/core/lib/security/credentials/credentials_metadata.cc
+++ b/src/core/lib/security/credentials/credentials_metadata.cc
@@ -33,8 +33,8 @@ static void mdelem_list_ensure_capacity(grpc_credentials_mdelem_array* list,
   while (new_size < target_size) {
     new_size *= 2;
   }
-  list->md =
-      (grpc_mdelem*)gpr_realloc(list->md, sizeof(grpc_mdelem) * new_size);
+  list->md = static_cast<grpc_mdelem*>(
+      gpr_realloc(list->md, sizeof(grpc_mdelem) * new_size));
 }
 
 void grpc_credentials_mdelem_array_add(grpc_credentials_mdelem_array* list,
diff --git a/src/core/lib/security/credentials/fake/fake_credentials.cc b/src/core/lib/security/credentials/fake/fake_credentials.cc
index 9065325cdd..3b29db2efa 100644
--- a/src/core/lib/security/credentials/fake/fake_credentials.cc
+++ b/src/core/lib/security/credentials/fake/fake_credentials.cc
@@ -59,8 +59,8 @@ static grpc_server_credentials_vtable
 
 grpc_channel_credentials* grpc_fake_transport_security_credentials_create(
     void) {
-  grpc_channel_credentials* c =
-      (grpc_channel_credentials*)gpr_zalloc(sizeof(grpc_channel_credentials));
+  grpc_channel_credentials* c = static_cast<grpc_channel_credentials*>(
+      gpr_zalloc(sizeof(grpc_channel_credentials)));
   c->type = GRPC_CHANNEL_CREDENTIALS_TYPE_FAKE_TRANSPORT_SECURITY;
   c->vtable = &fake_transport_security_credentials_vtable;
   gpr_ref_init(&c->refcount, 1);
@@ -69,8 +69,8 @@ grpc_channel_credentials* grpc_fake_transport_security_credentials_create(
 
 grpc_server_credentials* grpc_fake_transport_security_server_credentials_create(
     void) {
-  grpc_server_credentials* c =
-      (grpc_server_credentials*)gpr_malloc(sizeof(grpc_server_credentials));
+  grpc_server_credentials* c = static_cast<grpc_server_credentials*>(
+      gpr_malloc(sizeof(grpc_server_credentials)));
   memset(c, 0, sizeof(grpc_server_credentials));
   c->type = GRPC_CHANNEL_CREDENTIALS_TYPE_FAKE_TRANSPORT_SECURITY;
   gpr_ref_init(&c->refcount, 1);
@@ -97,7 +97,8 @@ const char* grpc_fake_transport_get_expected_targets(
 /* -- Metadata-only test credentials. -- */
 
 static void md_only_test_destruct(grpc_call_credentials* creds) {
-  grpc_md_only_test_credentials* c = (grpc_md_only_test_credentials*)creds;
+  grpc_md_only_test_credentials* c =
+      reinterpret_cast<grpc_md_only_test_credentials*>(creds);
   GRPC_MDELEM_UNREF(c->md);
 }
 
@@ -105,7 +106,8 @@ static bool md_only_test_get_request_metadata(
     grpc_call_credentials* creds, grpc_polling_entity* pollent,
     grpc_auth_metadata_context context, grpc_credentials_mdelem_array* md_array,
     grpc_closure* on_request_metadata, grpc_error** error) {
-  grpc_md_only_test_credentials* c = (grpc_md_only_test_credentials*)creds;
+  grpc_md_only_test_credentials* c =
+      reinterpret_cast<grpc_md_only_test_credentials*>(creds);
   grpc_credentials_mdelem_array_add(md_array, c->md);
   if (c->is_async) {
     GRPC_CLOSURE_SCHED(on_request_metadata, GRPC_ERROR_NONE);
@@ -126,8 +128,9 @@ static grpc_call_credentials_vtable md_only_test_vtable = {
 
 grpc_call_credentials* grpc_md_only_test_credentials_create(
     const char* md_key, const char* md_value, bool is_async) {
-  grpc_md_only_test_credentials* c = (grpc_md_only_test_credentials*)gpr_zalloc(
-      sizeof(grpc_md_only_test_credentials));
+  grpc_md_only_test_credentials* c =
+      static_cast<grpc_md_only_test_credentials*>(
+          gpr_zalloc(sizeof(grpc_md_only_test_credentials)));
   c->base.type = GRPC_CALL_CREDENTIALS_TYPE_OAUTH2;
   c->base.vtable = &md_only_test_vtable;
   gpr_ref_init(&c->base.refcount, 1);
diff --git a/src/core/lib/security/credentials/google_default/google_default_credentials.cc b/src/core/lib/security/credentials/google_default/google_default_credentials.cc
index dc19202033..65455f94b3 100644
--- a/src/core/lib/security/credentials/google_default/google_default_credentials.cc
+++ b/src/core/lib/security/credentials/google_default/google_default_credentials.cc
@@ -60,7 +60,8 @@ typedef struct {
 
 static void on_compute_engine_detection_http_response(void* user_data,
                                                       grpc_error* error) {
-  compute_engine_detector* detector = (compute_engine_detector*)user_data;
+  compute_engine_detector* detector =
+      static_cast<compute_engine_detector*>(user_data);
   if (error == GRPC_ERROR_NONE && detector->response.status == 200 &&
       detector->response.hdr_count > 0) {
     /* Internet providers can return a generic response to all requests, so
@@ -85,7 +86,7 @@ static void on_compute_engine_detection_http_response(void* user_data,
 }
 
 static void destroy_pollset(void* p, grpc_error* e) {
-  grpc_pollset_destroy((grpc_pollset*)p);
+  grpc_pollset_destroy(static_cast<grpc_pollset*>(p));
 }
 
 static int is_stack_running_on_compute_engine() {
@@ -98,7 +99,8 @@ static int is_stack_running_on_compute_engine() {
      on compute engine. */
   grpc_millis max_detection_delay = GPR_MS_PER_SEC;
 
-  grpc_pollset* pollset = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
+  grpc_pollset* pollset =
+      static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(pollset, &g_polling_mu);
   detector.pollent = grpc_polling_entity_create_from_pollset(pollset);
   detector.is_done = 0;
@@ -171,7 +173,8 @@ static grpc_error* create_default_creds_from_path(
     goto end;
   }
   json = grpc_json_parse_string_with_len(
-      (char*)GRPC_SLICE_START_PTR(creds_data), GRPC_SLICE_LENGTH(creds_data));
+      reinterpret_cast<char*> GRPC_SLICE_START_PTR(creds_data),
+      GRPC_SLICE_LENGTH(creds_data));
   if (json == nullptr) {
     error = grpc_error_set_str(
         GRPC_ERROR_CREATE_FROM_STATIC_STRING("Failed to parse JSON"),
diff --git a/src/core/lib/security/credentials/iam/iam_credentials.cc b/src/core/lib/security/credentials/iam/iam_credentials.cc
index 75acb2a58e..7f19fbc785 100644
--- a/src/core/lib/security/credentials/iam/iam_credentials.cc
+++ b/src/core/lib/security/credentials/iam/iam_credentials.cc
@@ -28,7 +28,8 @@
 #include <grpc/support/sync.h>
 
 static void iam_destruct(grpc_call_credentials* creds) {
-  grpc_google_iam_credentials* c = (grpc_google_iam_credentials*)creds;
+  grpc_google_iam_credentials* c =
+      reinterpret_cast<grpc_google_iam_credentials*>(creds);
   grpc_credentials_mdelem_array_destroy(&c->md_array);
 }
 
@@ -38,7 +39,8 @@ static bool iam_get_request_metadata(grpc_call_credentials* creds,
                                      grpc_credentials_mdelem_array* md_array,
                                      grpc_closure* on_request_metadata,
                                      grpc_error** error) {
-  grpc_google_iam_credentials* c = (grpc_google_iam_credentials*)creds;
+  grpc_google_iam_credentials* c =
+      reinterpret_cast<grpc_google_iam_credentials*>(creds);
   grpc_credentials_mdelem_array_append(md_array, &c->md_array);
   return true;
 }
@@ -63,7 +65,7 @@ grpc_call_credentials* grpc_google_iam_credentials_create(
   GPR_ASSERT(token != nullptr);
   GPR_ASSERT(authority_selector != nullptr);
   grpc_google_iam_credentials* c =
-      (grpc_google_iam_credentials*)gpr_zalloc(sizeof(*c));
+      static_cast<grpc_google_iam_credentials*>(gpr_zalloc(sizeof(*c)));
   c->base.type = GRPC_CALL_CREDENTIALS_TYPE_IAM;
   c->base.vtable = &iam_vtable;
   gpr_ref_init(&c->base.refcount, 1);
diff --git a/src/core/lib/security/credentials/jwt/json_token.cc b/src/core/lib/security/credentials/jwt/json_token.cc
index 078f04ed11..f7c9f57808 100644
--- a/src/core/lib/security/credentials/jwt/json_token.cc
+++ b/src/core/lib/security/credentials/jwt/json_token.cc
@@ -96,7 +96,7 @@ grpc_auth_json_key grpc_auth_json_key_create_from_json(const grpc_json* json) {
   }
   bio = BIO_new(BIO_s_mem());
   success = BIO_puts(bio, prop_value);
-  if ((success < 0) || ((size_t)success != strlen(prop_value))) {
+  if ((success < 0) || (static_cast<size_t>(success) != strlen(prop_value))) {
     gpr_log(GPR_ERROR, "Could not write into openssl BIO.");
     goto end;
   }
@@ -219,7 +219,8 @@ static char* dot_concat_and_free_strings(char* str1, char* str2) {
   size_t str1_len = strlen(str1);
   size_t str2_len = strlen(str2);
   size_t result_len = str1_len + 1 /* dot */ + str2_len;
-  char* result = (char*)gpr_malloc(result_len + 1 /* NULL terminated */);
+  char* result =
+      static_cast<char*>(gpr_malloc(result_len + 1 /* NULL terminated */));
   char* current = result;
   memcpy(current, str1, str1_len);
   current += str1_len;
@@ -271,7 +272,7 @@ char* compute_and_encode_signature(const grpc_auth_json_key* json_key,
     gpr_log(GPR_ERROR, "DigestFinal (get signature length) failed.");
     goto end;
   }
-  sig = (unsigned char*)gpr_malloc(sig_len);
+  sig = static_cast<unsigned char*>(gpr_malloc(sig_len));
   if (EVP_DigestSignFinal(md_ctx, sig, &sig_len) != 1) {
     gpr_log(GPR_ERROR, "DigestFinal (signature compute) failed.");
     goto end;
diff --git a/src/core/lib/security/credentials/jwt/jwt_credentials.cc b/src/core/lib/security/credentials/jwt/jwt_credentials.cc
index 2404e860e4..05c08a68b0 100644
--- a/src/core/lib/security/credentials/jwt/jwt_credentials.cc
+++ b/src/core/lib/security/credentials/jwt/jwt_credentials.cc
@@ -42,7 +42,7 @@ static void jwt_reset_cache(grpc_service_account_jwt_access_credentials* c) {
 
 static void jwt_destruct(grpc_call_credentials* creds) {
   grpc_service_account_jwt_access_credentials* c =
-      (grpc_service_account_jwt_access_credentials*)creds;
+      reinterpret_cast<grpc_service_account_jwt_access_credentials*>(creds);
   grpc_auth_json_key_destruct(&c->key);
   jwt_reset_cache(c);
   gpr_mu_destroy(&c->cache_mu);
@@ -55,7 +55,7 @@ static bool jwt_get_request_metadata(grpc_call_credentials* creds,
                                      grpc_closure* on_request_metadata,
                                      grpc_error** error) {
   grpc_service_account_jwt_access_credentials* c =
-      (grpc_service_account_jwt_access_credentials*)creds;
+      reinterpret_cast<grpc_service_account_jwt_access_credentials*>(creds);
   gpr_timespec refresh_threshold = gpr_time_from_seconds(
       GRPC_SECURE_TOKEN_REFRESH_THRESHOLD_SECS, GPR_TIMESPAN);
 
@@ -123,8 +123,8 @@ grpc_service_account_jwt_access_credentials_create_from_auth_json_key(
     gpr_log(GPR_ERROR, "Invalid input for jwt credentials creation");
     return nullptr;
   }
-  c = (grpc_service_account_jwt_access_credentials*)gpr_zalloc(
-      sizeof(grpc_service_account_jwt_access_credentials));
+  c = static_cast<grpc_service_account_jwt_access_credentials*>(
+      gpr_zalloc(sizeof(grpc_service_account_jwt_access_credentials)));
   c->base.type = GRPC_CALL_CREDENTIALS_TYPE_JWT;
   gpr_ref_init(&c->base.refcount, 1);
   c->base.vtable = &jwt_vtable;
@@ -133,7 +133,7 @@ grpc_service_account_jwt_access_credentials_create_from_auth_json_key(
   if (gpr_time_cmp(token_lifetime, max_token_lifetime) > 0) {
     gpr_log(GPR_INFO,
             "Cropping token lifetime to maximum allowed value (%d secs).",
-            (int)max_token_lifetime.tv_sec);
+            static_cast<int>(max_token_lifetime.tv_sec));
     token_lifetime = grpc_max_auth_token_lifetime();
   }
   c->jwt_lifetime = token_lifetime;
@@ -154,7 +154,7 @@ static char* redact_private_key(const char* json_key) {
   while (current) {
     if (current->type == GRPC_JSON_STRING &&
         strcmp(current->key, "private_key") == 0) {
-      current->value = (char*)redacted;
+      current->value = const_cast<char*>(redacted);
       break;
     }
     current = current->next;
@@ -177,7 +177,7 @@ grpc_call_credentials* grpc_service_account_jwt_access_credentials_create(
             ", tv_nsec: %d, clock_type: %d }, "
             "reserved=%p)",
             clean_json, token_lifetime.tv_sec, token_lifetime.tv_nsec,
-            (int)token_lifetime.clock_type, reserved);
+            static_cast<int>(token_lifetime.clock_type), reserved);
     gpr_free(clean_json);
   }
   GPR_ASSERT(reserved == nullptr);
diff --git a/src/core/lib/security/credentials/jwt/jwt_verifier.cc b/src/core/lib/security/credentials/jwt/jwt_verifier.cc
index 8b22307944..f5c1ada6ca 100644
--- a/src/core/lib/security/credentials/jwt/jwt_verifier.cc
+++ b/src/core/lib/security/credentials/jwt/jwt_verifier.cc
@@ -82,8 +82,9 @@ static grpc_json* parse_json_part_from_jwt(const char* str, size_t len,
     gpr_log(GPR_ERROR, "Invalid base64.");
     return nullptr;
   }
-  json = grpc_json_parse_string_with_len((char*)GRPC_SLICE_START_PTR(*buffer),
-                                         GRPC_SLICE_LENGTH(*buffer));
+  json = grpc_json_parse_string_with_len(
+      reinterpret_cast<char*> GRPC_SLICE_START_PTR(*buffer),
+      GRPC_SLICE_LENGTH(*buffer));
   if (json == nullptr) {
     grpc_slice_unref_internal(*buffer);
     gpr_log(GPR_ERROR, "JSON parsing error.");
@@ -129,7 +130,7 @@ static void jose_header_destroy(jose_header* h) {
 /* Takes ownership of json and buffer. */
 static jose_header* jose_header_from_json(grpc_json* json, grpc_slice buffer) {
   grpc_json* cur;
-  jose_header* h = (jose_header*)gpr_zalloc(sizeof(jose_header));
+  jose_header* h = static_cast<jose_header*>(gpr_zalloc(sizeof(jose_header)));
   h->buffer = buffer;
   for (cur = json->child; cur != nullptr; cur = cur->next) {
     if (strcmp(cur->key, "alg") == 0) {
@@ -231,7 +232,7 @@ gpr_timespec grpc_jwt_claims_not_before(const grpc_jwt_claims* claims) {
 grpc_jwt_claims* grpc_jwt_claims_from_json(grpc_json* json, grpc_slice buffer) {
   grpc_json* cur;
   grpc_jwt_claims* claims =
-      (grpc_jwt_claims*)gpr_malloc(sizeof(grpc_jwt_claims));
+      static_cast<grpc_jwt_claims*>(gpr_malloc(sizeof(grpc_jwt_claims)));
   memset(claims, 0, sizeof(grpc_jwt_claims));
   claims->json = json;
   claims->buffer = buffer;
@@ -347,7 +348,8 @@ static verifier_cb_ctx* verifier_cb_ctx_create(
     const char* signed_jwt, size_t signed_jwt_len, void* user_data,
     grpc_jwt_verification_done_cb cb) {
   grpc_core::ExecCtx exec_ctx;
-  verifier_cb_ctx* ctx = (verifier_cb_ctx*)gpr_zalloc(sizeof(verifier_cb_ctx));
+  verifier_cb_ctx* ctx =
+      static_cast<verifier_cb_ctx*>(gpr_zalloc(sizeof(verifier_cb_ctx)));
   ctx->verifier = verifier;
   ctx->pollent = grpc_polling_entity_create_from_pollset(pollset);
   ctx->header = header;
@@ -429,7 +431,7 @@ static EVP_PKEY* extract_pkey_from_x509(const char* x509_str) {
   BIO* bio = BIO_new(BIO_s_mem());
   size_t len = strlen(x509_str);
   GPR_ASSERT(len < INT_MAX);
-  BIO_write(bio, x509_str, (int)len);
+  BIO_write(bio, x509_str, static_cast<int>(len));
   x509 = PEM_read_bio_X509(bio, nullptr, nullptr, nullptr);
   if (x509 == nullptr) {
     gpr_log(GPR_ERROR, "Unable to parse x509 cert.");
@@ -625,7 +627,7 @@ end:
 }
 
 static void on_keys_retrieved(void* user_data, grpc_error* error) {
-  verifier_cb_ctx* ctx = (verifier_cb_ctx*)user_data;
+  verifier_cb_ctx* ctx = static_cast<verifier_cb_ctx*>(user_data);
   grpc_json* json = json_from_http(&ctx->responses[HTTP_RESPONSE_KEYS]);
   EVP_PKEY* verification_key = nullptr;
   grpc_jwt_verifier_status status = GRPC_JWT_VERIFIER_GENERIC_ERROR;
@@ -666,7 +668,7 @@ end:
 
 static void on_openid_config_retrieved(void* user_data, grpc_error* error) {
   const grpc_json* cur;
-  verifier_cb_ctx* ctx = (verifier_cb_ctx*)user_data;
+  verifier_cb_ctx* ctx = static_cast<verifier_cb_ctx*>(user_data);
   const grpc_http_response* response = &ctx->responses[HTTP_RESPONSE_OPENID];
   grpc_json* json = json_from_http(response);
   grpc_httpcli_request req;
@@ -689,7 +691,7 @@ static void on_openid_config_retrieved(void* user_data, grpc_error* error) {
   jwks_uri += 8;
   req.handshaker = &grpc_httpcli_ssl;
   req.host = gpr_strdup(jwks_uri);
-  req.http.path = (char*)strchr(jwks_uri, '/');
+  req.http.path = const_cast<char*>(strchr(jwks_uri, '/'));
   if (req.http.path == nullptr) {
     req.http.path = (char*)"";
   } else {
@@ -754,8 +756,8 @@ const char* grpc_jwt_issuer_email_domain(const char* issuer) {
   if (dot == nullptr || dot == email_domain) return email_domain;
   GPR_ASSERT(dot > email_domain);
   /* There may be a subdomain, we just want the domain. */
-  dot = (const char*)gpr_memrchr((void*)email_domain, '.',
-                                 (size_t)(dot - email_domain));
+  dot = static_cast<const char*>(gpr_memrchr(
+      (void*)email_domain, '.', static_cast<size_t>(dot - email_domain)));
   if (dot == nullptr) return email_domain;
   return dot + 1;
 }
@@ -861,7 +863,8 @@ void grpc_jwt_verifier_verify(grpc_jwt_verifier* verifier,
              cb != nullptr);
   dot = strchr(cur, '.');
   if (dot == nullptr) goto error;
-  json = parse_json_part_from_jwt(cur, (size_t)(dot - cur), &header_buffer);
+  json = parse_json_part_from_jwt(cur, static_cast<size_t>(dot - cur),
+                                  &header_buffer);
   if (json == nullptr) goto error;
   header = jose_header_from_json(json, header_buffer);
   if (header == nullptr) goto error;
@@ -869,12 +872,13 @@ void grpc_jwt_verifier_verify(grpc_jwt_verifier* verifier,
   cur = dot + 1;
   dot = strchr(cur, '.');
   if (dot == nullptr) goto error;
-  json = parse_json_part_from_jwt(cur, (size_t)(dot - cur), &claims_buffer);
+  json = parse_json_part_from_jwt(cur, static_cast<size_t>(dot - cur),
+                                  &claims_buffer);
   if (json == nullptr) goto error;
   claims = grpc_jwt_claims_from_json(json, claims_buffer);
   if (claims == nullptr) goto error;
 
-  signed_jwt_len = (size_t)(dot - jwt);
+  signed_jwt_len = static_cast<size_t>(dot - jwt);
   cur = dot + 1;
   signature = grpc_base64_decode(cur, 1);
   if (GRPC_SLICE_IS_EMPTY(signature)) goto error;
@@ -893,13 +897,13 @@ grpc_jwt_verifier* grpc_jwt_verifier_create(
     const grpc_jwt_verifier_email_domain_key_url_mapping* mappings,
     size_t num_mappings) {
   grpc_jwt_verifier* v =
-      (grpc_jwt_verifier*)gpr_zalloc(sizeof(grpc_jwt_verifier));
+      static_cast<grpc_jwt_verifier*>(gpr_zalloc(sizeof(grpc_jwt_verifier)));
   grpc_httpcli_context_init(&v->http_ctx);
 
   /* We know at least of one mapping. */
   v->allocated_mappings = 1 + num_mappings;
-  v->mappings = (email_key_mapping*)gpr_malloc(v->allocated_mappings *
-                                               sizeof(email_key_mapping));
+  v->mappings = static_cast<email_key_mapping*>(
+      gpr_malloc(v->allocated_mappings * sizeof(email_key_mapping)));
   verifier_put_mapping(v, GRPC_GOOGLE_SERVICE_ACCOUNTS_EMAIL_DOMAIN,
                        GRPC_GOOGLE_SERVICE_ACCOUNTS_KEY_URL_PREFIX);
   /* User-Provided mappings. */
diff --git a/src/core/lib/security/credentials/oauth2/oauth2_credentials.cc b/src/core/lib/security/credentials/oauth2/oauth2_credentials.cc
index e243ea52c6..afae7d8f2f 100644
--- a/src/core/lib/security/credentials/oauth2/oauth2_credentials.cc
+++ b/src/core/lib/security/credentials/oauth2/oauth2_credentials.cc
@@ -105,7 +105,7 @@ void grpc_auth_refresh_token_destruct(grpc_auth_refresh_token* refresh_token) {
 
 static void oauth2_token_fetcher_destruct(grpc_call_credentials* creds) {
   grpc_oauth2_token_fetcher_credentials* c =
-      (grpc_oauth2_token_fetcher_credentials*)creds;
+      reinterpret_cast<grpc_oauth2_token_fetcher_credentials*>(creds);
   GRPC_MDELEM_UNREF(c->access_token_md);
   gpr_mu_destroy(&c->mu);
   grpc_pollset_set_destroy(grpc_polling_entity_pollset_set(&c->pollent));
@@ -128,7 +128,8 @@ grpc_oauth2_token_fetcher_credentials_parse_server_response(
   }
 
   if (response->body_length > 0) {
-    null_terminated_body = (char*)gpr_malloc(response->body_length + 1);
+    null_terminated_body =
+        static_cast<char*>(gpr_malloc(response->body_length + 1));
     null_terminated_body[response->body_length] = '\0';
     memcpy(null_terminated_body, response->body, response->body_length);
   }
@@ -204,9 +205,9 @@ static void on_oauth2_token_fetcher_http_response(void* user_data,
                                                   grpc_error* error) {
   GRPC_LOG_IF_ERROR("oauth_fetch", GRPC_ERROR_REF(error));
   grpc_credentials_metadata_request* r =
-      (grpc_credentials_metadata_request*)user_data;
+      static_cast<grpc_credentials_metadata_request*>(user_data);
   grpc_oauth2_token_fetcher_credentials* c =
-      (grpc_oauth2_token_fetcher_credentials*)r->creds;
+      reinterpret_cast<grpc_oauth2_token_fetcher_credentials*>(r->creds);
   grpc_mdelem access_token_md = GRPC_MDNULL;
   grpc_millis token_lifetime;
   grpc_credentials_status status =
@@ -249,7 +250,7 @@ static bool oauth2_token_fetcher_get_request_metadata(
     grpc_auth_metadata_context context, grpc_credentials_mdelem_array* md_array,
     grpc_closure* on_request_metadata, grpc_error** error) {
   grpc_oauth2_token_fetcher_credentials* c =
-      (grpc_oauth2_token_fetcher_credentials*)creds;
+      reinterpret_cast<grpc_oauth2_token_fetcher_credentials*>(creds);
   // Check if we can use the cached token.
   grpc_millis refresh_threshold =
       GRPC_SECURE_TOKEN_REFRESH_THRESHOLD_SECS * GPR_MS_PER_SEC;
@@ -269,8 +270,8 @@ static bool oauth2_token_fetcher_get_request_metadata(
   // Couldn't get the token from the cache.
   // Add request to c->pending_requests and start a new fetch if needed.
   grpc_oauth2_pending_get_request_metadata* pending_request =
-      (grpc_oauth2_pending_get_request_metadata*)gpr_malloc(
-          sizeof(*pending_request));
+      static_cast<grpc_oauth2_pending_get_request_metadata*>(
+          gpr_malloc(sizeof(*pending_request)));
   pending_request->md_array = md_array;
   pending_request->on_request_metadata = on_request_metadata;
   pending_request->pollent = pollent;
@@ -298,7 +299,7 @@ static void oauth2_token_fetcher_cancel_get_request_metadata(
     grpc_call_credentials* creds, grpc_credentials_mdelem_array* md_array,
     grpc_error* error) {
   grpc_oauth2_token_fetcher_credentials* c =
-      (grpc_oauth2_token_fetcher_credentials*)creds;
+      reinterpret_cast<grpc_oauth2_token_fetcher_credentials*>(creds);
   gpr_mu_lock(&c->mu);
   grpc_oauth2_pending_get_request_metadata* prev = nullptr;
   grpc_oauth2_pending_get_request_metadata* pending_request =
@@ -371,8 +372,8 @@ static void compute_engine_fetch_oauth2(
 grpc_call_credentials* grpc_google_compute_engine_credentials_create(
     void* reserved) {
   grpc_oauth2_token_fetcher_credentials* c =
-      (grpc_oauth2_token_fetcher_credentials*)gpr_malloc(
-          sizeof(grpc_oauth2_token_fetcher_credentials));
+      static_cast<grpc_oauth2_token_fetcher_credentials*>(
+          gpr_malloc(sizeof(grpc_oauth2_token_fetcher_credentials)));
   GRPC_API_TRACE("grpc_compute_engine_credentials_create(reserved=%p)", 1,
                  (reserved));
   GPR_ASSERT(reserved == nullptr);
@@ -387,7 +388,7 @@ grpc_call_credentials* grpc_google_compute_engine_credentials_create(
 
 static void refresh_token_destruct(grpc_call_credentials* creds) {
   grpc_google_refresh_token_credentials* c =
-      (grpc_google_refresh_token_credentials*)creds;
+      reinterpret_cast<grpc_google_refresh_token_credentials*>(creds);
   grpc_auth_refresh_token_destruct(&c->refresh_token);
   oauth2_token_fetcher_destruct(&c->base.base);
 }
@@ -401,7 +402,8 @@ static void refresh_token_fetch_oauth2(
     grpc_httpcli_context* httpcli_context, grpc_polling_entity* pollent,
     grpc_iomgr_cb_func response_cb, grpc_millis deadline) {
   grpc_google_refresh_token_credentials* c =
-      (grpc_google_refresh_token_credentials*)metadata_req->creds;
+      reinterpret_cast<grpc_google_refresh_token_credentials*>(
+          metadata_req->creds);
   grpc_http_header header = {(char*)"Content-Type",
                              (char*)"application/x-www-form-urlencoded"};
   grpc_httpcli_request request;
@@ -437,8 +439,8 @@ grpc_refresh_token_credentials_create_from_auth_refresh_token(
     gpr_log(GPR_ERROR, "Invalid input for refresh token credentials creation");
     return nullptr;
   }
-  c = (grpc_google_refresh_token_credentials*)gpr_zalloc(
-      sizeof(grpc_google_refresh_token_credentials));
+  c = static_cast<grpc_google_refresh_token_credentials*>(
+      gpr_zalloc(sizeof(grpc_google_refresh_token_credentials)));
   init_oauth2_token_fetcher(&c->base, refresh_token_fetch_oauth2);
   c->base.base.vtable = &refresh_token_vtable;
   c->refresh_token = refresh_token;
@@ -478,7 +480,8 @@ grpc_call_credentials* grpc_google_refresh_token_credentials_create(
 //
 
 static void access_token_destruct(grpc_call_credentials* creds) {
-  grpc_access_token_credentials* c = (grpc_access_token_credentials*)creds;
+  grpc_access_token_credentials* c =
+      reinterpret_cast<grpc_access_token_credentials*>(creds);
   GRPC_MDELEM_UNREF(c->access_token_md);
 }
 
@@ -486,7 +489,8 @@ static bool access_token_get_request_metadata(
     grpc_call_credentials* creds, grpc_polling_entity* pollent,
     grpc_auth_metadata_context context, grpc_credentials_mdelem_array* md_array,
     grpc_closure* on_request_metadata, grpc_error** error) {
-  grpc_access_token_credentials* c = (grpc_access_token_credentials*)creds;
+  grpc_access_token_credentials* c =
+      reinterpret_cast<grpc_access_token_credentials*>(creds);
   grpc_credentials_mdelem_array_add(md_array, c->access_token_md);
   return true;
 }
@@ -503,8 +507,9 @@ static grpc_call_credentials_vtable access_token_vtable = {
 
 grpc_call_credentials* grpc_access_token_credentials_create(
     const char* access_token, void* reserved) {
-  grpc_access_token_credentials* c = (grpc_access_token_credentials*)gpr_zalloc(
-      sizeof(grpc_access_token_credentials));
+  grpc_access_token_credentials* c =
+      static_cast<grpc_access_token_credentials*>(
+          gpr_zalloc(sizeof(grpc_access_token_credentials)));
   GRPC_API_TRACE(
       "grpc_access_token_credentials_create(access_token=<redacted>, "
       "reserved=%p)",
diff --git a/src/core/lib/security/credentials/plugin/plugin_credentials.cc b/src/core/lib/security/credentials/plugin/plugin_credentials.cc
index 203ba58c67..ddb86e153b 100644
--- a/src/core/lib/security/credentials/plugin/plugin_credentials.cc
+++ b/src/core/lib/security/credentials/plugin/plugin_credentials.cc
@@ -34,7 +34,8 @@
 grpc_core::TraceFlag grpc_plugin_credentials_trace(false, "plugin_credentials");
 
 static void plugin_destruct(grpc_call_credentials* creds) {
-  grpc_plugin_credentials* c = (grpc_plugin_credentials*)creds;
+  grpc_plugin_credentials* c =
+      reinterpret_cast<grpc_plugin_credentials*>(creds);
   gpr_mu_destroy(&c->mu);
   if (c->plugin.state != nullptr && c->plugin.destroy != nullptr) {
     c->plugin.destroy(c->plugin.state);
@@ -118,7 +119,7 @@ static void plugin_md_request_metadata_ready(void* request,
   grpc_core::ExecCtx exec_ctx(GRPC_EXEC_CTX_FLAG_IS_FINISHED |
                               GRPC_EXEC_CTX_FLAG_THREAD_RESOURCE_LOOP);
   grpc_plugin_credentials_pending_request* r =
-      (grpc_plugin_credentials_pending_request*)request;
+      static_cast<grpc_plugin_credentials_pending_request*>(request);
   if (grpc_plugin_credentials_trace.enabled()) {
     gpr_log(GPR_INFO,
             "plugin_credentials[%p]: request %p: plugin returned "
@@ -147,13 +148,14 @@ static bool plugin_get_request_metadata(grpc_call_credentials* creds,
                                         grpc_credentials_mdelem_array* md_array,
                                         grpc_closure* on_request_metadata,
                                         grpc_error** error) {
-  grpc_plugin_credentials* c = (grpc_plugin_credentials*)creds;
+  grpc_plugin_credentials* c =
+      reinterpret_cast<grpc_plugin_credentials*>(creds);
   bool retval = true;  // Synchronous return.
   if (c->plugin.get_metadata != nullptr) {
     // Create pending_request object.
     grpc_plugin_credentials_pending_request* pending_request =
-        (grpc_plugin_credentials_pending_request*)gpr_zalloc(
-            sizeof(*pending_request));
+        static_cast<grpc_plugin_credentials_pending_request*>(
+            gpr_zalloc(sizeof(*pending_request)));
     pending_request->creds = c;
     pending_request->md_array = md_array;
     pending_request->on_request_metadata = on_request_metadata;
@@ -225,7 +227,8 @@ static bool plugin_get_request_metadata(grpc_call_credentials* creds,
 static void plugin_cancel_get_request_metadata(
     grpc_call_credentials* creds, grpc_credentials_mdelem_array* md_array,
     grpc_error* error) {
-  grpc_plugin_credentials* c = (grpc_plugin_credentials*)creds;
+  grpc_plugin_credentials* c =
+      reinterpret_cast<grpc_plugin_credentials*>(creds);
   gpr_mu_lock(&c->mu);
   for (grpc_plugin_credentials_pending_request* pending_request =
            c->pending_requests;
@@ -252,7 +255,8 @@ static grpc_call_credentials_vtable plugin_vtable = {
 
 grpc_call_credentials* grpc_metadata_credentials_create_from_plugin(
     grpc_metadata_credentials_plugin plugin, void* reserved) {
-  grpc_plugin_credentials* c = (grpc_plugin_credentials*)gpr_zalloc(sizeof(*c));
+  grpc_plugin_credentials* c =
+      static_cast<grpc_plugin_credentials*>(gpr_zalloc(sizeof(*c)));
   GRPC_API_TRACE("grpc_metadata_credentials_create_from_plugin(reserved=%p)", 1,
                  (reserved));
   GPR_ASSERT(reserved == nullptr);
diff --git a/src/core/lib/security/credentials/ssl/ssl_credentials.cc b/src/core/lib/security/credentials/ssl/ssl_credentials.cc
index d8546441c9..a4fce25f3a 100644
--- a/src/core/lib/security/credentials/ssl/ssl_credentials.cc
+++ b/src/core/lib/security/credentials/ssl/ssl_credentials.cc
@@ -42,7 +42,7 @@ void grpc_tsi_ssl_pem_key_cert_pairs_destroy(tsi_ssl_pem_key_cert_pair* kp,
 }
 
 static void ssl_destruct(grpc_channel_credentials* creds) {
-  grpc_ssl_credentials* c = (grpc_ssl_credentials*)creds;
+  grpc_ssl_credentials* c = reinterpret_cast<grpc_ssl_credentials*>(creds);
   gpr_free(c->config.pem_root_certs);
   grpc_tsi_ssl_pem_key_cert_pairs_destroy(c->config.pem_key_cert_pair, 1);
 }
@@ -51,7 +51,7 @@ static grpc_security_status ssl_create_security_connector(
     grpc_channel_credentials* creds, grpc_call_credentials* call_creds,
     const char* target, const grpc_channel_args* args,
     grpc_channel_security_connector** sc, grpc_channel_args** new_args) {
-  grpc_ssl_credentials* c = (grpc_ssl_credentials*)creds;
+  grpc_ssl_credentials* c = reinterpret_cast<grpc_ssl_credentials*>(creds);
   grpc_security_status status = GRPC_SECURITY_OK;
   const char* overridden_target_name = nullptr;
   for (size_t i = 0; args && i < args->num_args; i++) {
@@ -85,8 +85,8 @@ static void ssl_build_config(const char* pem_root_certs,
   if (pem_key_cert_pair != nullptr) {
     GPR_ASSERT(pem_key_cert_pair->private_key != nullptr);
     GPR_ASSERT(pem_key_cert_pair->cert_chain != nullptr);
-    config->pem_key_cert_pair = (tsi_ssl_pem_key_cert_pair*)gpr_zalloc(
-        sizeof(tsi_ssl_pem_key_cert_pair));
+    config->pem_key_cert_pair = static_cast<tsi_ssl_pem_key_cert_pair*>(
+        gpr_zalloc(sizeof(tsi_ssl_pem_key_cert_pair)));
     config->pem_key_cert_pair->cert_chain =
         gpr_strdup(pem_key_cert_pair->cert_chain);
     config->pem_key_cert_pair->private_key =
@@ -97,8 +97,8 @@ static void ssl_build_config(const char* pem_root_certs,
 grpc_channel_credentials* grpc_ssl_credentials_create(
     const char* pem_root_certs, grpc_ssl_pem_key_cert_pair* pem_key_cert_pair,
     void* reserved) {
-  grpc_ssl_credentials* c =
-      (grpc_ssl_credentials*)gpr_zalloc(sizeof(grpc_ssl_credentials));
+  grpc_ssl_credentials* c = static_cast<grpc_ssl_credentials*>(
+      gpr_zalloc(sizeof(grpc_ssl_credentials)));
   GRPC_API_TRACE(
       "grpc_ssl_credentials_create(pem_root_certs=%s, "
       "pem_key_cert_pair=%p, "
@@ -123,7 +123,8 @@ struct grpc_ssl_server_credentials_options {
 };
 
 static void ssl_server_destruct(grpc_server_credentials* creds) {
-  grpc_ssl_server_credentials* c = (grpc_ssl_server_credentials*)creds;
+  grpc_ssl_server_credentials* c =
+      reinterpret_cast<grpc_ssl_server_credentials*>(creds);
   grpc_tsi_ssl_pem_key_cert_pairs_destroy(c->config.pem_key_cert_pairs,
                                           c->config.num_key_cert_pairs);
   gpr_free(c->config.pem_root_certs);
@@ -143,8 +144,8 @@ tsi_ssl_pem_key_cert_pair* grpc_convert_grpc_to_tsi_cert_pairs(
   tsi_ssl_pem_key_cert_pair* tsi_pairs = nullptr;
   if (num_key_cert_pairs > 0) {
     GPR_ASSERT(pem_key_cert_pairs != nullptr);
-    tsi_pairs = (tsi_ssl_pem_key_cert_pair*)gpr_zalloc(
-        num_key_cert_pairs * sizeof(tsi_ssl_pem_key_cert_pair));
+    tsi_pairs = static_cast<tsi_ssl_pem_key_cert_pair*>(
+        gpr_zalloc(num_key_cert_pairs * sizeof(tsi_ssl_pem_key_cert_pair)));
   }
   for (size_t i = 0; i < num_key_cert_pairs; i++) {
     GPR_ASSERT(pem_key_cert_pairs[i].private_key != nullptr);
@@ -174,15 +175,15 @@ grpc_ssl_server_certificate_config* grpc_ssl_server_certificate_config_create(
     const grpc_ssl_pem_key_cert_pair* pem_key_cert_pairs,
     size_t num_key_cert_pairs) {
   grpc_ssl_server_certificate_config* config =
-      (grpc_ssl_server_certificate_config*)gpr_zalloc(
-          sizeof(grpc_ssl_server_certificate_config));
+      static_cast<grpc_ssl_server_certificate_config*>(
+          gpr_zalloc(sizeof(grpc_ssl_server_certificate_config)));
   if (pem_root_certs != nullptr) {
     config->pem_root_certs = gpr_strdup(pem_root_certs);
   }
   if (num_key_cert_pairs > 0) {
     GPR_ASSERT(pem_key_cert_pairs != nullptr);
-    config->pem_key_cert_pairs = (grpc_ssl_pem_key_cert_pair*)gpr_zalloc(
-        num_key_cert_pairs * sizeof(grpc_ssl_pem_key_cert_pair));
+    config->pem_key_cert_pairs = static_cast<grpc_ssl_pem_key_cert_pair*>(
+        gpr_zalloc(num_key_cert_pairs * sizeof(grpc_ssl_pem_key_cert_pair)));
   }
   config->num_key_cert_pairs = num_key_cert_pairs;
   for (size_t i = 0; i < num_key_cert_pairs; i++) {
@@ -217,8 +218,8 @@ grpc_ssl_server_credentials_create_options_using_config(
     gpr_log(GPR_ERROR, "Certificate config must not be NULL.");
     goto done;
   }
-  options = (grpc_ssl_server_credentials_options*)gpr_zalloc(
-      sizeof(grpc_ssl_server_credentials_options));
+  options = static_cast<grpc_ssl_server_credentials_options*>(
+      gpr_zalloc(sizeof(grpc_ssl_server_credentials_options)));
   options->client_certificate_request = client_certificate_request;
   options->certificate_config = config;
 done:
@@ -235,14 +236,14 @@ grpc_ssl_server_credentials_create_options_using_config_fetcher(
   }
 
   grpc_ssl_server_certificate_config_fetcher* fetcher =
-      (grpc_ssl_server_certificate_config_fetcher*)gpr_zalloc(
-          sizeof(grpc_ssl_server_certificate_config_fetcher));
+      static_cast<grpc_ssl_server_certificate_config_fetcher*>(
+          gpr_zalloc(sizeof(grpc_ssl_server_certificate_config_fetcher)));
   fetcher->cb = cb;
   fetcher->user_data = user_data;
 
   grpc_ssl_server_credentials_options* options =
-      (grpc_ssl_server_credentials_options*)gpr_zalloc(
-          sizeof(grpc_ssl_server_credentials_options));
+      static_cast<grpc_ssl_server_credentials_options*>(
+          gpr_zalloc(sizeof(grpc_ssl_server_credentials_options)));
   options->client_certificate_request = client_certificate_request;
   options->certificate_config_fetcher = fetcher;
 
@@ -307,8 +308,8 @@ grpc_server_credentials* grpc_ssl_server_credentials_create_with_options(
     goto done;
   }
 
-  c = (grpc_ssl_server_credentials*)gpr_zalloc(
-      sizeof(grpc_ssl_server_credentials));
+  c = static_cast<grpc_ssl_server_credentials*>(
+      gpr_zalloc(sizeof(grpc_ssl_server_credentials)));
   c->base.type = GRPC_CHANNEL_CREDENTIALS_TYPE_SSL;
   gpr_ref_init(&c->base.refcount, 1);
   c->base.vtable = &ssl_server_vtable;
diff --git a/src/core/lib/security/transport/client_auth_filter.cc b/src/core/lib/security/transport/client_auth_filter.cc
index 802503c868..d2313807ff 100644
--- a/src/core/lib/security/transport/client_auth_filter.cc
+++ b/src/core/lib/security/transport/client_auth_filter.cc
@@ -70,11 +70,11 @@ struct channel_data {
 void grpc_auth_metadata_context_reset(
     grpc_auth_metadata_context* auth_md_context) {
   if (auth_md_context->service_url != nullptr) {
-    gpr_free((char*)auth_md_context->service_url);
+    gpr_free(const_cast<char*>(auth_md_context->service_url));
     auth_md_context->service_url = nullptr;
   }
   if (auth_md_context->method_name != nullptr) {
-    gpr_free((char*)auth_md_context->method_name);
+    gpr_free(const_cast<char*>(auth_md_context->method_name));
     auth_md_context->method_name = nullptr;
   }
   GRPC_AUTH_CONTEXT_UNREF(
@@ -93,10 +93,11 @@ static void add_error(grpc_error** combined, grpc_error* error) {
 }
 
 static void on_credentials_metadata(void* arg, grpc_error* input_error) {
-  grpc_transport_stream_op_batch* batch = (grpc_transport_stream_op_batch*)arg;
+  grpc_transport_stream_op_batch* batch =
+      static_cast<grpc_transport_stream_op_batch*>(arg);
   grpc_call_element* elem =
-      (grpc_call_element*)batch->handler_private.extra_arg;
-  call_data* calld = (call_data*)elem->call_data;
+      static_cast<grpc_call_element*>(batch->handler_private.extra_arg);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   grpc_auth_metadata_context_reset(&calld->auth_md_context);
   grpc_error* error = GRPC_ERROR_REF(input_error);
   if (error == GRPC_ERROR_NONE) {
@@ -159,8 +160,8 @@ void grpc_auth_metadata_context_build(
 }
 
 static void cancel_get_request_metadata(void* arg, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)arg;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(arg);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (error != GRPC_ERROR_NONE) {
     grpc_call_credentials_cancel_get_request_metadata(
         calld->creds, &calld->md_array, GRPC_ERROR_REF(error));
@@ -170,12 +171,11 @@ static void cancel_get_request_metadata(void* arg, grpc_error* error) {
 
 static void send_security_metadata(grpc_call_element* elem,
                                    grpc_transport_stream_op_batch* batch) {
-  call_data* calld = (call_data*)elem->call_data;
-  channel_data* chand = (channel_data*)elem->channel_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   grpc_client_security_context* ctx =
-      (grpc_client_security_context*)batch->payload
-          ->context[GRPC_CONTEXT_SECURITY]
-          .value;
+      static_cast<grpc_client_security_context*>(
+          batch->payload->context[GRPC_CONTEXT_SECURITY].value);
   grpc_call_credentials* channel_call_creds =
       chand->security_connector->request_metadata_creds;
   int call_creds_has_md = (ctx != nullptr) && (ctx->creds != nullptr);
@@ -231,10 +231,11 @@ static void send_security_metadata(grpc_call_element* elem,
 }
 
 static void on_host_checked(void* arg, grpc_error* error) {
-  grpc_transport_stream_op_batch* batch = (grpc_transport_stream_op_batch*)arg;
+  grpc_transport_stream_op_batch* batch =
+      static_cast<grpc_transport_stream_op_batch*>(arg);
   grpc_call_element* elem =
-      (grpc_call_element*)batch->handler_private.extra_arg;
-  call_data* calld = (call_data*)elem->call_data;
+      static_cast<grpc_call_element*>(batch->handler_private.extra_arg);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (error == GRPC_ERROR_NONE) {
     send_security_metadata(elem, batch);
   } else {
@@ -255,9 +256,9 @@ static void on_host_checked(void* arg, grpc_error* error) {
 }
 
 static void cancel_check_call_host(void* arg, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)arg;
-  call_data* calld = (call_data*)elem->call_data;
-  channel_data* chand = (channel_data*)elem->channel_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(arg);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   if (error != GRPC_ERROR_NONE) {
     grpc_channel_security_connector_cancel_check_call_host(
         chand->security_connector, &calld->async_result_closure,
@@ -271,8 +272,8 @@ static void auth_start_transport_stream_op_batch(
   GPR_TIMER_SCOPE("auth_start_transport_stream_op_batch", 0);
 
   /* grab pointers to our data from the call element */
-  call_data* calld = (call_data*)elem->call_data;
-  channel_data* chand = (channel_data*)elem->channel_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
 
   if (!batch->cancel_stream) {
     GPR_ASSERT(batch->payload->context != nullptr);
@@ -283,9 +284,8 @@ static void auth_start_transport_stream_op_batch(
           grpc_client_security_context_destroy;
     }
     grpc_client_security_context* sec_ctx =
-        (grpc_client_security_context*)batch->payload
-            ->context[GRPC_CONTEXT_SECURITY]
-            .value;
+        static_cast<grpc_client_security_context*>(
+            batch->payload->context[GRPC_CONTEXT_SECURITY].value);
     GRPC_AUTH_CONTEXT_UNREF(sec_ctx->auth_context, "client auth filter");
     sec_ctx->auth_context =
         GRPC_AUTH_CONTEXT_REF(chand->auth_context, "client_auth_filter");
@@ -346,7 +346,7 @@ static void auth_start_transport_stream_op_batch(
 /* Constructor for call_data */
 static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   calld->owning_call = args->call_stack;
   calld->call_combiner = args->call_combiner;
   return GRPC_ERROR_NONE;
@@ -354,7 +354,7 @@ static grpc_error* init_call_elem(grpc_call_element* elem,
 
 static void set_pollset_or_pollset_set(grpc_call_element* elem,
                                        grpc_polling_entity* pollent) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   calld->pollent = pollent;
 }
 
@@ -362,7 +362,7 @@ static void set_pollset_or_pollset_set(grpc_call_element* elem,
 static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   grpc_credentials_mdelem_array_destroy(&calld->md_array);
   grpc_call_credentials_unref(calld->creds);
   if (calld->have_host) {
@@ -391,7 +391,7 @@ static grpc_error* init_channel_elem(grpc_channel_element* elem,
   }
 
   /* grab pointers to our data from the channel element */
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
 
   /* The first and the last filters tend to be implemented differently to
      handle the case that there's no 'next' filter to call on the up or down
@@ -400,8 +400,8 @@ static grpc_error* init_channel_elem(grpc_channel_element* elem,
 
   /* initialize members */
   chand->security_connector =
-      (grpc_channel_security_connector*)GRPC_SECURITY_CONNECTOR_REF(
-          sc, "client_auth_filter");
+      reinterpret_cast<grpc_channel_security_connector*>(
+          GRPC_SECURITY_CONNECTOR_REF(sc, "client_auth_filter"));
   chand->auth_context =
       GRPC_AUTH_CONTEXT_REF(auth_context, "client_auth_filter");
   return GRPC_ERROR_NONE;
@@ -410,7 +410,7 @@ static grpc_error* init_channel_elem(grpc_channel_element* elem,
 /* Destructor for channel data */
 static void destroy_channel_elem(grpc_channel_element* elem) {
   /* grab pointers to our data from the channel element */
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   grpc_channel_security_connector* sc = chand->security_connector;
   if (sc != nullptr) {
     GRPC_SECURITY_CONNECTOR_UNREF(&sc->base, "client_auth_filter");
diff --git a/src/core/lib/security/transport/lb_targets_info.cc b/src/core/lib/security/transport/lb_targets_info.cc
index 183b1ebf35..67a3c7449d 100644
--- a/src/core/lib/security/transport/lb_targets_info.cc
+++ b/src/core/lib/security/transport/lb_targets_info.cc
@@ -26,14 +26,15 @@
 #define GRPC_ARG_LB_SECURE_NAMING_MAP "grpc.lb_secure_naming_map"
 
 static void* targets_info_copy(void* p) {
-  return grpc_slice_hash_table_ref((grpc_slice_hash_table*)p);
+  return grpc_slice_hash_table_ref(static_cast<grpc_slice_hash_table*>(p));
 }
 static void targets_info_destroy(void* p) {
-  grpc_slice_hash_table_unref((grpc_slice_hash_table*)p);
+  grpc_slice_hash_table_unref(static_cast<grpc_slice_hash_table*>(p));
 }
 static int targets_info_cmp(void* a, void* b) {
-  return grpc_slice_hash_table_cmp((const grpc_slice_hash_table*)a,
-                                   (const grpc_slice_hash_table*)b);
+  return grpc_slice_hash_table_cmp(
+      static_cast<const grpc_slice_hash_table*>(a),
+      static_cast<const grpc_slice_hash_table*>(b));
 }
 static const grpc_arg_pointer_vtable server_to_balancer_names_vtable = {
     targets_info_copy, targets_info_destroy, targets_info_cmp};
@@ -51,7 +52,8 @@ grpc_slice_hash_table* grpc_lb_targets_info_find_in_args(
       grpc_channel_args_find(args, GRPC_ARG_LB_SECURE_NAMING_MAP);
   if (targets_info_arg != nullptr) {
     GPR_ASSERT(targets_info_arg->type == GRPC_ARG_POINTER);
-    return (grpc_slice_hash_table*)targets_info_arg->value.pointer.p;
+    return static_cast<grpc_slice_hash_table*>(
+        targets_info_arg->value.pointer.p);
   }
   return nullptr;
 }
diff --git a/src/core/lib/security/transport/secure_endpoint.cc b/src/core/lib/security/transport/secure_endpoint.cc
index 9eaa299897..f72f8b6121 100644
--- a/src/core/lib/security/transport/secure_endpoint.cc
+++ b/src/core/lib/security/transport/secure_endpoint.cc
@@ -144,7 +144,7 @@ static void on_read(void* user_data, grpc_error* error) {
   unsigned i;
   uint8_t keep_looping = 0;
   tsi_result result = TSI_OK;
-  secure_endpoint* ep = (secure_endpoint*)user_data;
+  secure_endpoint* ep = static_cast<secure_endpoint*>(user_data);
   uint8_t* cur = GRPC_SLICE_START_PTR(ep->read_staging_buffer);
   uint8_t* end = GRPC_SLICE_END_PTR(ep->read_staging_buffer);
 
@@ -168,7 +168,7 @@ static void on_read(void* user_data, grpc_error* error) {
       size_t message_size = GRPC_SLICE_LENGTH(encrypted);
 
       while (message_size > 0 || keep_looping) {
-        size_t unprotected_buffer_size_written = (size_t)(end - cur);
+        size_t unprotected_buffer_size_written = static_cast<size_t>(end - cur);
         size_t processed_message_size = message_size;
         gpr_mu_lock(&ep->protector_mu);
         result = tsi_frame_protector_unprotect(
@@ -205,7 +205,8 @@ static void on_read(void* user_data, grpc_error* error) {
           ep->read_buffer,
           grpc_slice_split_head(
               &ep->read_staging_buffer,
-              (size_t)(cur - GRPC_SLICE_START_PTR(ep->read_staging_buffer))));
+              static_cast<size_t>(
+                  cur - GRPC_SLICE_START_PTR(ep->read_staging_buffer))));
     }
   }
 
@@ -226,7 +227,7 @@ static void on_read(void* user_data, grpc_error* error) {
 
 static void endpoint_read(grpc_endpoint* secure_ep, grpc_slice_buffer* slices,
                           grpc_closure* cb) {
-  secure_endpoint* ep = (secure_endpoint*)secure_ep;
+  secure_endpoint* ep = reinterpret_cast<secure_endpoint*>(secure_ep);
   ep->read_cb = cb;
   ep->read_buffer = slices;
   grpc_slice_buffer_reset_and_unref_internal(ep->read_buffer);
@@ -256,7 +257,7 @@ static void endpoint_write(grpc_endpoint* secure_ep, grpc_slice_buffer* slices,
 
   unsigned i;
   tsi_result result = TSI_OK;
-  secure_endpoint* ep = (secure_endpoint*)secure_ep;
+  secure_endpoint* ep = reinterpret_cast<secure_endpoint*>(secure_ep);
   uint8_t* cur = GRPC_SLICE_START_PTR(ep->write_staging_buffer);
   uint8_t* end = GRPC_SLICE_END_PTR(ep->write_staging_buffer);
 
@@ -282,7 +283,7 @@ static void endpoint_write(grpc_endpoint* secure_ep, grpc_slice_buffer* slices,
       uint8_t* message_bytes = GRPC_SLICE_START_PTR(plain);
       size_t message_size = GRPC_SLICE_LENGTH(plain);
       while (message_size > 0) {
-        size_t protected_buffer_size_to_send = (size_t)(end - cur);
+        size_t protected_buffer_size_to_send = static_cast<size_t>(end - cur);
         size_t processed_message_size = message_size;
         gpr_mu_lock(&ep->protector_mu);
         result = tsi_frame_protector_protect(ep->protector, message_bytes,
@@ -307,7 +308,7 @@ static void endpoint_write(grpc_endpoint* secure_ep, grpc_slice_buffer* slices,
     if (result == TSI_OK) {
       size_t still_pending_size;
       do {
-        size_t protected_buffer_size_to_send = (size_t)(end - cur);
+        size_t protected_buffer_size_to_send = static_cast<size_t>(end - cur);
         gpr_mu_lock(&ep->protector_mu);
         result = tsi_frame_protector_protect_flush(
             ep->protector, cur, &protected_buffer_size_to_send,
@@ -324,8 +325,8 @@ static void endpoint_write(grpc_endpoint* secure_ep, grpc_slice_buffer* slices,
             &ep->output_buffer,
             grpc_slice_split_head(
                 &ep->write_staging_buffer,
-                (size_t)(cur -
-                         GRPC_SLICE_START_PTR(ep->write_staging_buffer))));
+                static_cast<size_t>(
+                    cur - GRPC_SLICE_START_PTR(ep->write_staging_buffer))));
       }
     }
   }
@@ -343,46 +344,46 @@ static void endpoint_write(grpc_endpoint* secure_ep, grpc_slice_buffer* slices,
 }
 
 static void endpoint_shutdown(grpc_endpoint* secure_ep, grpc_error* why) {
-  secure_endpoint* ep = (secure_endpoint*)secure_ep;
+  secure_endpoint* ep = reinterpret_cast<secure_endpoint*>(secure_ep);
   grpc_endpoint_shutdown(ep->wrapped_ep, why);
 }
 
 static void endpoint_destroy(grpc_endpoint* secure_ep) {
-  secure_endpoint* ep = (secure_endpoint*)secure_ep;
+  secure_endpoint* ep = reinterpret_cast<secure_endpoint*>(secure_ep);
   SECURE_ENDPOINT_UNREF(ep, "destroy");
 }
 
 static void endpoint_add_to_pollset(grpc_endpoint* secure_ep,
                                     grpc_pollset* pollset) {
-  secure_endpoint* ep = (secure_endpoint*)secure_ep;
+  secure_endpoint* ep = reinterpret_cast<secure_endpoint*>(secure_ep);
   grpc_endpoint_add_to_pollset(ep->wrapped_ep, pollset);
 }
 
 static void endpoint_add_to_pollset_set(grpc_endpoint* secure_ep,
                                         grpc_pollset_set* pollset_set) {
-  secure_endpoint* ep = (secure_endpoint*)secure_ep;
+  secure_endpoint* ep = reinterpret_cast<secure_endpoint*>(secure_ep);
   grpc_endpoint_add_to_pollset_set(ep->wrapped_ep, pollset_set);
 }
 
 static void endpoint_delete_from_pollset_set(grpc_endpoint* secure_ep,
                                              grpc_pollset_set* pollset_set) {
-  secure_endpoint* ep = (secure_endpoint*)secure_ep;
+  secure_endpoint* ep = reinterpret_cast<secure_endpoint*>(secure_ep);
   grpc_endpoint_delete_from_pollset_set(ep->wrapped_ep, pollset_set);
 }
 
 static char* endpoint_get_peer(grpc_endpoint* secure_ep) {
-  secure_endpoint* ep = (secure_endpoint*)secure_ep;
+  secure_endpoint* ep = reinterpret_cast<secure_endpoint*>(secure_ep);
   return grpc_endpoint_get_peer(ep->wrapped_ep);
 }
 
 static int endpoint_get_fd(grpc_endpoint* secure_ep) {
-  secure_endpoint* ep = (secure_endpoint*)secure_ep;
+  secure_endpoint* ep = reinterpret_cast<secure_endpoint*>(secure_ep);
   return grpc_endpoint_get_fd(ep->wrapped_ep);
 }
 
 static grpc_resource_user* endpoint_get_resource_user(
     grpc_endpoint* secure_ep) {
-  secure_endpoint* ep = (secure_endpoint*)secure_ep;
+  secure_endpoint* ep = reinterpret_cast<secure_endpoint*>(secure_ep);
   return grpc_endpoint_get_resource_user(ep->wrapped_ep);
 }
 
@@ -403,7 +404,8 @@ grpc_endpoint* grpc_secure_endpoint_create(
     grpc_endpoint* transport, grpc_slice* leftover_slices,
     size_t leftover_nslices) {
   size_t i;
-  secure_endpoint* ep = (secure_endpoint*)gpr_malloc(sizeof(secure_endpoint));
+  secure_endpoint* ep =
+      static_cast<secure_endpoint*>(gpr_malloc(sizeof(secure_endpoint)));
   ep->base.vtable = &vtable;
   ep->wrapped_ep = transport;
   ep->protector = protector;
diff --git a/src/core/lib/security/transport/security_connector.cc b/src/core/lib/security/transport/security_connector.cc
index fd632bdbab..bd5da1bbd2 100644
--- a/src/core/lib/security/transport/security_connector.cc
+++ b/src/core/lib/security/transport/security_connector.cc
@@ -239,8 +239,8 @@ static void* connector_arg_copy(void* p) {
 }
 
 static int connector_cmp(void* a, void* b) {
-  return grpc_security_connector_cmp((grpc_security_connector*)a,
-                                     (grpc_security_connector*)b);
+  return grpc_security_connector_cmp(static_cast<grpc_security_connector*>(a),
+                                     static_cast<grpc_security_connector*>(b));
 }
 
 static const grpc_arg_pointer_vtable connector_arg_vtable = {
@@ -258,7 +258,7 @@ grpc_security_connector* grpc_security_connector_from_arg(const grpc_arg* arg) {
             GRPC_ARG_SECURITY_CONNECTOR);
     return nullptr;
   }
-  return (grpc_security_connector*)arg->value.pointer.p;
+  return static_cast<grpc_security_connector*>(arg->value.pointer.p);
 }
 
 grpc_security_connector* grpc_security_connector_find_in_args(
@@ -308,7 +308,7 @@ typedef struct {
 
 static void fake_channel_destroy(grpc_security_connector* sc) {
   grpc_fake_channel_security_connector* c =
-      (grpc_fake_channel_security_connector*)sc;
+      reinterpret_cast<grpc_fake_channel_security_connector*>(sc);
   grpc_call_credentials_unref(c->base.request_metadata_creds);
   gpr_free(c->target);
   gpr_free(c->expected_targets);
@@ -420,7 +420,7 @@ static void fake_channel_check_peer(grpc_security_connector* sc, tsi_peer peer,
                                     grpc_closure* on_peer_checked) {
   fake_check_peer(sc, peer, auth_context, on_peer_checked);
   grpc_fake_channel_security_connector* c =
-      (grpc_fake_channel_security_connector*)sc;
+      reinterpret_cast<grpc_fake_channel_security_connector*>(sc);
   fake_secure_name_check(c->target, c->expected_targets, c->is_lb_channel);
 }
 
@@ -433,9 +433,9 @@ static void fake_server_check_peer(grpc_security_connector* sc, tsi_peer peer,
 static int fake_channel_cmp(grpc_security_connector* sc1,
                             grpc_security_connector* sc2) {
   grpc_fake_channel_security_connector* c1 =
-      (grpc_fake_channel_security_connector*)sc1;
+      reinterpret_cast<grpc_fake_channel_security_connector*>(sc1);
   grpc_fake_channel_security_connector* c2 =
-      (grpc_fake_channel_security_connector*)sc2;
+      reinterpret_cast<grpc_fake_channel_security_connector*>(sc2);
   int c = grpc_channel_security_connector_cmp(&c1->base, &c2->base);
   if (c != 0) return c;
   c = strcmp(c1->target, c2->target);
@@ -452,8 +452,8 @@ static int fake_channel_cmp(grpc_security_connector* sc1,
 static int fake_server_cmp(grpc_security_connector* sc1,
                            grpc_security_connector* sc2) {
   return grpc_server_security_connector_cmp(
-      (grpc_server_security_connector*)sc1,
-      (grpc_server_security_connector*)sc2);
+      reinterpret_cast<grpc_server_security_connector*>(sc1),
+      reinterpret_cast<grpc_server_security_connector*>(sc2));
 }
 
 static bool fake_channel_check_call_host(grpc_channel_security_connector* sc,
@@ -498,7 +498,8 @@ grpc_channel_security_connector* grpc_fake_channel_security_connector_create(
     grpc_call_credentials* request_metadata_creds, const char* target,
     const grpc_channel_args* args) {
   grpc_fake_channel_security_connector* c =
-      (grpc_fake_channel_security_connector*)gpr_zalloc(sizeof(*c));
+      static_cast<grpc_fake_channel_security_connector*>(
+          gpr_zalloc(sizeof(*c)));
   gpr_ref_init(&c->base.base.refcount, 1);
   c->base.base.url_scheme = GRPC_FAKE_SECURITY_URL_SCHEME;
   c->base.base.vtable = &fake_channel_vtable;
@@ -518,8 +519,8 @@ grpc_channel_security_connector* grpc_fake_channel_security_connector_create(
 grpc_server_security_connector* grpc_fake_server_security_connector_create(
     grpc_server_credentials* server_creds) {
   grpc_server_security_connector* c =
-      (grpc_server_security_connector*)gpr_zalloc(
-          sizeof(grpc_server_security_connector));
+      static_cast<grpc_server_security_connector*>(
+          gpr_zalloc(sizeof(grpc_server_security_connector)));
   gpr_ref_init(&c->base.refcount, 1);
   c->base.vtable = &fake_server_vtable;
   c->base.url_scheme = GRPC_FAKE_SECURITY_URL_SCHEME;
@@ -546,14 +547,14 @@ static bool server_connector_has_cert_config_fetcher(
     grpc_ssl_server_security_connector* c) {
   GPR_ASSERT(c != nullptr);
   grpc_ssl_server_credentials* server_creds =
-      (grpc_ssl_server_credentials*)c->base.server_creds;
+      reinterpret_cast<grpc_ssl_server_credentials*>(c->base.server_creds);
   GPR_ASSERT(server_creds != nullptr);
   return server_creds->certificate_config_fetcher.cb != nullptr;
 }
 
 static void ssl_channel_destroy(grpc_security_connector* sc) {
   grpc_ssl_channel_security_connector* c =
-      (grpc_ssl_channel_security_connector*)sc;
+      reinterpret_cast<grpc_ssl_channel_security_connector*>(sc);
   grpc_channel_credentials_unref(c->base.channel_creds);
   grpc_call_credentials_unref(c->base.request_metadata_creds);
   tsi_ssl_client_handshaker_factory_unref(c->client_handshaker_factory);
@@ -565,7 +566,7 @@ static void ssl_channel_destroy(grpc_security_connector* sc) {
 
 static void ssl_server_destroy(grpc_security_connector* sc) {
   grpc_ssl_server_security_connector* c =
-      (grpc_ssl_server_security_connector*)sc;
+      reinterpret_cast<grpc_ssl_server_security_connector*>(sc);
   grpc_server_credentials_unref(c->base.server_creds);
   tsi_ssl_server_handshaker_factory_unref(c->server_handshaker_factory);
   c->server_handshaker_factory = nullptr;
@@ -575,7 +576,7 @@ static void ssl_server_destroy(grpc_security_connector* sc) {
 static void ssl_channel_add_handshakers(grpc_channel_security_connector* sc,
                                         grpc_handshake_manager* handshake_mgr) {
   grpc_ssl_channel_security_connector* c =
-      (grpc_ssl_channel_security_connector*)sc;
+      reinterpret_cast<grpc_ssl_channel_security_connector*>(sc);
   // Instantiate TSI handshaker.
   tsi_handshaker* tsi_hs = nullptr;
   tsi_result result = tsi_ssl_client_handshaker_factory_create_handshaker(
@@ -597,8 +598,8 @@ static void ssl_channel_add_handshakers(grpc_channel_security_connector* sc,
 static const char** fill_alpn_protocol_strings(size_t* num_alpn_protocols) {
   GPR_ASSERT(num_alpn_protocols != nullptr);
   *num_alpn_protocols = grpc_chttp2_num_alpn_versions();
-  const char** alpn_protocol_strings =
-      (const char**)gpr_malloc(sizeof(const char*) * (*num_alpn_protocols));
+  const char** alpn_protocol_strings = static_cast<const char**>(
+      gpr_malloc(sizeof(const char*) * (*num_alpn_protocols)));
   for (size_t i = 0; i < *num_alpn_protocols; i++) {
     alpn_protocol_strings[i] = grpc_chttp2_get_alpn_version_index(i);
   }
@@ -627,13 +628,13 @@ static bool try_replace_server_handshaker_factory(
       config->pem_key_cert_pairs, config->num_key_cert_pairs);
   tsi_ssl_server_handshaker_factory* new_handshaker_factory = nullptr;
   grpc_ssl_server_credentials* server_creds =
-      (grpc_ssl_server_credentials*)sc->base.server_creds;
+      reinterpret_cast<grpc_ssl_server_credentials*>(sc->base.server_creds);
   tsi_result result = tsi_create_ssl_server_handshaker_factory_ex(
       cert_pairs, config->num_key_cert_pairs, config->pem_root_certs,
       get_tsi_client_certificate_request_type(
           server_creds->config.client_certificate_request),
-      ssl_cipher_suites(), alpn_protocol_strings, (uint16_t)num_alpn_protocols,
-      &new_handshaker_factory);
+      ssl_cipher_suites(), alpn_protocol_strings,
+      static_cast<uint16_t>(num_alpn_protocols), &new_handshaker_factory);
   gpr_free(cert_pairs);
   gpr_free((void*)alpn_protocol_strings);
 
@@ -659,7 +660,7 @@ static bool try_fetch_ssl_server_credentials(
   if (!server_connector_has_cert_config_fetcher(sc)) return false;
 
   grpc_ssl_server_credentials* server_creds =
-      (grpc_ssl_server_credentials*)sc->base.server_creds;
+      reinterpret_cast<grpc_ssl_server_credentials*>(sc->base.server_creds);
   grpc_ssl_certificate_config_reload_status cb_result =
       server_creds->certificate_config_fetcher.cb(
           server_creds->certificate_config_fetcher.user_data,
@@ -686,7 +687,7 @@ static bool try_fetch_ssl_server_credentials(
 static void ssl_server_add_handshakers(grpc_server_security_connector* sc,
                                        grpc_handshake_manager* handshake_mgr) {
   grpc_ssl_server_security_connector* c =
-      (grpc_ssl_server_security_connector*)sc;
+      reinterpret_cast<grpc_ssl_server_security_connector*>(sc);
   // Instantiate TSI handshaker.
   try_fetch_ssl_server_credentials(c);
   tsi_handshaker* tsi_hs = nullptr;
@@ -788,7 +789,7 @@ static void ssl_channel_check_peer(grpc_security_connector* sc, tsi_peer peer,
                                    grpc_auth_context** auth_context,
                                    grpc_closure* on_peer_checked) {
   grpc_ssl_channel_security_connector* c =
-      (grpc_ssl_channel_security_connector*)sc;
+      reinterpret_cast<grpc_ssl_channel_security_connector*>(sc);
   grpc_error* error = ssl_check_peer(sc,
                                      c->overridden_target_name != nullptr
                                          ? c->overridden_target_name
@@ -809,9 +810,9 @@ static void ssl_server_check_peer(grpc_security_connector* sc, tsi_peer peer,
 static int ssl_channel_cmp(grpc_security_connector* sc1,
                            grpc_security_connector* sc2) {
   grpc_ssl_channel_security_connector* c1 =
-      (grpc_ssl_channel_security_connector*)sc1;
+      reinterpret_cast<grpc_ssl_channel_security_connector*>(sc1);
   grpc_ssl_channel_security_connector* c2 =
-      (grpc_ssl_channel_security_connector*)sc2;
+      reinterpret_cast<grpc_ssl_channel_security_connector*>(sc2);
   int c = grpc_channel_security_connector_cmp(&c1->base, &c2->base);
   if (c != 0) return c;
   c = strcmp(c1->target_name, c2->target_name);
@@ -825,15 +826,15 @@ static int ssl_channel_cmp(grpc_security_connector* sc1,
 static int ssl_server_cmp(grpc_security_connector* sc1,
                           grpc_security_connector* sc2) {
   return grpc_server_security_connector_cmp(
-      (grpc_server_security_connector*)sc1,
-      (grpc_server_security_connector*)sc2);
+      reinterpret_cast<grpc_server_security_connector*>(sc1),
+      reinterpret_cast<grpc_server_security_connector*>(sc2));
 }
 
 static void add_shallow_auth_property_to_peer(tsi_peer* peer,
                                               const grpc_auth_property* prop,
                                               const char* tsi_prop_name) {
   tsi_peer_property* tsi_prop = &peer->properties[peer->property_count++];
-  tsi_prop->name = (char*)tsi_prop_name;
+  tsi_prop->name = const_cast<char*>(tsi_prop_name);
   tsi_prop->value.data = prop->value;
   tsi_prop->value.length = prop->value_length;
 }
@@ -850,8 +851,8 @@ tsi_peer tsi_shallow_peer_from_ssl_auth_context(
   while (grpc_auth_property_iterator_next(&it) != nullptr) max_num_props++;
 
   if (max_num_props > 0) {
-    peer.properties = (tsi_peer_property*)gpr_malloc(max_num_props *
-                                                     sizeof(tsi_peer_property));
+    peer.properties = static_cast<tsi_peer_property*>(
+        gpr_malloc(max_num_props * sizeof(tsi_peer_property)));
     it = grpc_auth_context_property_iterator(auth_context);
     while ((prop = grpc_auth_property_iterator_next(&it)) != nullptr) {
       if (strcmp(prop->name, GRPC_X509_SAN_PROPERTY_NAME) == 0) {
@@ -879,7 +880,7 @@ static bool ssl_channel_check_call_host(grpc_channel_security_connector* sc,
                                         grpc_closure* on_call_host_checked,
                                         grpc_error** error) {
   grpc_ssl_channel_security_connector* c =
-      (grpc_ssl_channel_security_connector*)sc;
+      reinterpret_cast<grpc_ssl_channel_security_connector*>(sc);
   grpc_security_status status = GRPC_SECURITY_ERROR;
   tsi_peer peer = tsi_shallow_peer_from_ssl_auth_context(auth_context);
   if (ssl_host_matches_name(&peer, host)) status = GRPC_SECURITY_OK;
@@ -963,7 +964,8 @@ const char* grpc_get_default_ssl_roots(void) {
   gpr_once_init(&once, init_default_pem_root_certs);
   return GRPC_SLICE_IS_EMPTY(default_pem_root_certs)
              ? nullptr
-             : (const char*)GRPC_SLICE_START_PTR(default_pem_root_certs);
+             : reinterpret_cast<const char*>
+                   GRPC_SLICE_START_PTR(default_pem_root_certs);
 }
 
 grpc_security_status grpc_ssl_channel_security_connector_create(
@@ -994,8 +996,8 @@ grpc_security_status grpc_ssl_channel_security_connector_create(
     pem_root_certs = config->pem_root_certs;
   }
 
-  c = (grpc_ssl_channel_security_connector*)gpr_zalloc(
-      sizeof(grpc_ssl_channel_security_connector));
+  c = static_cast<grpc_ssl_channel_security_connector*>(
+      gpr_zalloc(sizeof(grpc_ssl_channel_security_connector)));
 
   gpr_ref_init(&c->base.base.refcount, 1);
   c->base.base.vtable = &ssl_channel_vtable;
@@ -1017,8 +1019,8 @@ grpc_security_status grpc_ssl_channel_security_connector_create(
                       config->pem_key_cert_pair->cert_chain != nullptr;
   result = tsi_create_ssl_client_handshaker_factory(
       has_key_cert_pair ? config->pem_key_cert_pair : nullptr, pem_root_certs,
-      ssl_cipher_suites(), alpn_protocol_strings, (uint16_t)num_alpn_protocols,
-      &c->client_handshaker_factory);
+      ssl_cipher_suites(), alpn_protocol_strings,
+      static_cast<uint16_t>(num_alpn_protocols), &c->client_handshaker_factory);
   if (result != TSI_OK) {
     gpr_log(GPR_ERROR, "Handshaker factory creation failed with %s.",
             tsi_result_to_string(result));
@@ -1039,8 +1041,8 @@ static grpc_ssl_server_security_connector*
 grpc_ssl_server_security_connector_initialize(
     grpc_server_credentials* server_creds) {
   grpc_ssl_server_security_connector* c =
-      (grpc_ssl_server_security_connector*)gpr_zalloc(
-          sizeof(grpc_ssl_server_security_connector));
+      static_cast<grpc_ssl_server_security_connector*>(
+          gpr_zalloc(sizeof(grpc_ssl_server_security_connector)));
   gpr_ref_init(&c->base.base.refcount, 1);
   c->base.base.url_scheme = GRPC_SSL_URL_SCHEME;
   c->base.base.vtable = &ssl_server_vtable;
@@ -1053,7 +1055,7 @@ grpc_security_status grpc_ssl_server_security_connector_create(
     grpc_server_credentials* gsc, grpc_server_security_connector** sc) {
   tsi_result result = TSI_OK;
   grpc_ssl_server_credentials* server_credentials =
-      (grpc_ssl_server_credentials*)gsc;
+      reinterpret_cast<grpc_ssl_server_credentials*>(gsc);
   grpc_security_status retval = GRPC_SECURITY_OK;
 
   GPR_ASSERT(server_credentials != nullptr);
@@ -1078,7 +1080,8 @@ grpc_security_status grpc_ssl_server_security_connector_create(
         get_tsi_client_certificate_request_type(
             server_credentials->config.client_certificate_request),
         ssl_cipher_suites(), alpn_protocol_strings,
-        (uint16_t)num_alpn_protocols, &c->server_handshaker_factory);
+        static_cast<uint16_t>(num_alpn_protocols),
+        &c->server_handshaker_factory);
     gpr_free((void*)alpn_protocol_strings);
     if (result != TSI_OK) {
       gpr_log(GPR_ERROR, "Handshaker factory creation failed with %s.",
diff --git a/src/core/lib/security/transport/security_handshaker.cc b/src/core/lib/security/transport/security_handshaker.cc
index 7623fbfd5b..b37392ab81 100644
--- a/src/core/lib/security/transport/security_handshaker.cc
+++ b/src/core/lib/security/transport/security_handshaker.cc
@@ -68,8 +68,8 @@ typedef struct {
 static size_t move_read_buffer_into_handshake_buffer(security_handshaker* h) {
   size_t bytes_in_read_buffer = h->args->read_buffer->length;
   if (h->handshake_buffer_size < bytes_in_read_buffer) {
-    h->handshake_buffer =
-        (uint8_t*)gpr_realloc(h->handshake_buffer, bytes_in_read_buffer);
+    h->handshake_buffer = static_cast<uint8_t*>(
+        gpr_realloc(h->handshake_buffer, bytes_in_read_buffer));
     h->handshake_buffer_size = bytes_in_read_buffer;
   }
   size_t offset = 0;
@@ -205,7 +205,7 @@ static void on_peer_checked_inner(security_handshaker* h, grpc_error* error) {
 }
 
 static void on_peer_checked(void* arg, grpc_error* error) {
-  security_handshaker* h = (security_handshaker*)arg;
+  security_handshaker* h = static_cast<security_handshaker*>(arg);
   gpr_mu_lock(&h->mu);
   on_peer_checked_inner(h, error);
   gpr_mu_unlock(&h->mu);
@@ -249,7 +249,7 @@ static grpc_error* on_handshake_next_done_locked(
   if (bytes_to_send_size > 0) {
     // Send data to peer, if needed.
     grpc_slice to_send = grpc_slice_from_copied_buffer(
-        (const char*)bytes_to_send, bytes_to_send_size);
+        reinterpret_cast<const char*>(bytes_to_send), bytes_to_send_size);
     grpc_slice_buffer_reset_and_unref_internal(&h->outgoing);
     grpc_slice_buffer_add(&h->outgoing, to_send);
     grpc_endpoint_write(h->args->endpoint, &h->outgoing,
@@ -268,7 +268,7 @@ static grpc_error* on_handshake_next_done_locked(
 static void on_handshake_next_done_grpc_wrapper(
     tsi_result result, void* user_data, const unsigned char* bytes_to_send,
     size_t bytes_to_send_size, tsi_handshaker_result* handshaker_result) {
-  security_handshaker* h = (security_handshaker*)user_data;
+  security_handshaker* h = static_cast<security_handshaker*>(user_data);
   // This callback will be invoked by TSI in a non-grpc thread, so it's
   // safe to create our own exec_ctx here.
   grpc_core::ExecCtx exec_ctx;
@@ -307,7 +307,7 @@ static grpc_error* do_handshaker_next_locked(
 }
 
 static void on_handshake_data_received_from_peer(void* arg, grpc_error* error) {
-  security_handshaker* h = (security_handshaker*)arg;
+  security_handshaker* h = static_cast<security_handshaker*>(arg);
   gpr_mu_lock(&h->mu);
   if (error != GRPC_ERROR_NONE || h->shutdown) {
     security_handshake_failed_locked(
@@ -333,7 +333,7 @@ static void on_handshake_data_received_from_peer(void* arg, grpc_error* error) {
 }
 
 static void on_handshake_data_sent_to_peer(void* arg, grpc_error* error) {
-  security_handshaker* h = (security_handshaker*)arg;
+  security_handshaker* h = static_cast<security_handshaker*>(arg);
   gpr_mu_lock(&h->mu);
   if (error != GRPC_ERROR_NONE || h->shutdown) {
     security_handshake_failed_locked(
@@ -364,13 +364,13 @@ static void on_handshake_data_sent_to_peer(void* arg, grpc_error* error) {
 //
 
 static void security_handshaker_destroy(grpc_handshaker* handshaker) {
-  security_handshaker* h = (security_handshaker*)handshaker;
+  security_handshaker* h = reinterpret_cast<security_handshaker*>(handshaker);
   security_handshaker_unref(h);
 }
 
 static void security_handshaker_shutdown(grpc_handshaker* handshaker,
                                          grpc_error* why) {
-  security_handshaker* h = (security_handshaker*)handshaker;
+  security_handshaker* h = reinterpret_cast<security_handshaker*>(handshaker);
   gpr_mu_lock(&h->mu);
   if (!h->shutdown) {
     h->shutdown = true;
@@ -385,7 +385,7 @@ static void security_handshaker_do_handshake(grpc_handshaker* handshaker,
                                              grpc_tcp_server_acceptor* acceptor,
                                              grpc_closure* on_handshake_done,
                                              grpc_handshaker_args* args) {
-  security_handshaker* h = (security_handshaker*)handshaker;
+  security_handshaker* h = reinterpret_cast<security_handshaker*>(handshaker);
   gpr_mu_lock(&h->mu);
   h->args = args;
   h->on_handshake_done = on_handshake_done;
@@ -408,15 +408,16 @@ static const grpc_handshaker_vtable security_handshaker_vtable = {
 
 static grpc_handshaker* security_handshaker_create(
     tsi_handshaker* handshaker, grpc_security_connector* connector) {
-  security_handshaker* h =
-      (security_handshaker*)gpr_zalloc(sizeof(security_handshaker));
+  security_handshaker* h = static_cast<security_handshaker*>(
+      gpr_zalloc(sizeof(security_handshaker)));
   grpc_handshaker_init(&security_handshaker_vtable, &h->base);
   h->handshaker = handshaker;
   h->connector = GRPC_SECURITY_CONNECTOR_REF(connector, "handshake");
   gpr_mu_init(&h->mu);
   gpr_ref_init(&h->refs, 1);
   h->handshake_buffer_size = GRPC_INITIAL_HANDSHAKE_BUFFER_SIZE;
-  h->handshake_buffer = (uint8_t*)gpr_malloc(h->handshake_buffer_size);
+  h->handshake_buffer =
+      static_cast<uint8_t*>(gpr_malloc(h->handshake_buffer_size));
   GRPC_CLOSURE_INIT(&h->on_handshake_data_sent_to_peer,
                     on_handshake_data_sent_to_peer, h,
                     grpc_schedule_on_exec_ctx);
@@ -456,7 +457,7 @@ static const grpc_handshaker_vtable fail_handshaker_vtable = {
     fail_handshaker_do_handshake};
 
 static grpc_handshaker* fail_handshaker_create() {
-  grpc_handshaker* h = (grpc_handshaker*)gpr_malloc(sizeof(*h));
+  grpc_handshaker* h = static_cast<grpc_handshaker*>(gpr_malloc(sizeof(*h)));
   grpc_handshaker_init(&fail_handshaker_vtable, h);
   return h;
 }
@@ -469,8 +470,8 @@ static void client_handshaker_factory_add_handshakers(
     grpc_handshaker_factory* handshaker_factory, const grpc_channel_args* args,
     grpc_handshake_manager* handshake_mgr) {
   grpc_channel_security_connector* security_connector =
-      (grpc_channel_security_connector*)grpc_security_connector_find_in_args(
-          args);
+      reinterpret_cast<grpc_channel_security_connector*>(
+          grpc_security_connector_find_in_args(args));
   grpc_channel_security_connector_add_handshakers(security_connector,
                                                   handshake_mgr);
 }
@@ -479,8 +480,8 @@ static void server_handshaker_factory_add_handshakers(
     grpc_handshaker_factory* hf, const grpc_channel_args* args,
     grpc_handshake_manager* handshake_mgr) {
   grpc_server_security_connector* security_connector =
-      (grpc_server_security_connector*)grpc_security_connector_find_in_args(
-          args);
+      reinterpret_cast<grpc_server_security_connector*>(
+          grpc_security_connector_find_in_args(args));
   grpc_server_security_connector_add_handshakers(security_connector,
                                                  handshake_mgr);
 }
diff --git a/src/core/lib/security/transport/server_auth_filter.cc b/src/core/lib/security/transport/server_auth_filter.cc
index f82971dc56..409aded650 100644
--- a/src/core/lib/security/transport/server_auth_filter.cc
+++ b/src/core/lib/security/transport/server_auth_filter.cc
@@ -65,8 +65,8 @@ static grpc_metadata_array metadata_batch_to_md_array(
     grpc_slice value = GRPC_MDVALUE(md);
     if (result.count == result.capacity) {
       result.capacity = GPR_MAX(result.capacity + 8, result.capacity * 2);
-      result.metadata = (grpc_metadata*)gpr_realloc(
-          result.metadata, result.capacity * sizeof(grpc_metadata));
+      result.metadata = static_cast<grpc_metadata*>(gpr_realloc(
+          result.metadata, result.capacity * sizeof(grpc_metadata)));
     }
     usr_md = &result.metadata[result.count++];
     usr_md->key = grpc_slice_ref_internal(key);
@@ -77,8 +77,8 @@ static grpc_metadata_array metadata_batch_to_md_array(
 
 static grpc_filtered_mdelem remove_consumed_md(void* user_data,
                                                grpc_mdelem md) {
-  grpc_call_element* elem = (grpc_call_element*)user_data;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(user_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   size_t i;
   for (i = 0; i < calld->num_consumed_md; i++) {
     const grpc_metadata* consumed_md = &calld->consumed_md[i];
@@ -95,7 +95,7 @@ static void on_md_processing_done_inner(grpc_call_element* elem,
                                         const grpc_metadata* response_md,
                                         size_t num_response_md,
                                         grpc_error* error) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   grpc_transport_stream_op_batch* batch = calld->recv_initial_metadata_batch;
   /* TODO(jboeuf): Implement support for response_md. */
   if (response_md != nullptr && num_response_md > 0) {
@@ -118,12 +118,12 @@ static void on_md_processing_done(
     void* user_data, const grpc_metadata* consumed_md, size_t num_consumed_md,
     const grpc_metadata* response_md, size_t num_response_md,
     grpc_status_code status, const char* error_details) {
-  grpc_call_element* elem = (grpc_call_element*)user_data;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(user_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   grpc_core::ExecCtx exec_ctx;
   // If the call was not cancelled while we were in flight, process the result.
-  if (gpr_atm_full_cas(&calld->state, (gpr_atm)STATE_INIT,
-                       (gpr_atm)STATE_DONE)) {
+  if (gpr_atm_full_cas(&calld->state, static_cast<gpr_atm>(STATE_INIT),
+                       static_cast<gpr_atm>(STATE_DONE))) {
     grpc_error* error = GRPC_ERROR_NONE;
     if (status != GRPC_STATUS_OK) {
       if (error_details == nullptr) {
@@ -146,12 +146,12 @@ static void on_md_processing_done(
 }
 
 static void cancel_call(void* arg, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)arg;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(arg);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   // If the result was not already processed, invoke the callback now.
   if (error != GRPC_ERROR_NONE &&
-      gpr_atm_full_cas(&calld->state, (gpr_atm)STATE_INIT,
-                       (gpr_atm)STATE_CANCELLED)) {
+      gpr_atm_full_cas(&calld->state, static_cast<gpr_atm>(STATE_INIT),
+                       static_cast<gpr_atm>(STATE_CANCELLED))) {
     on_md_processing_done_inner(elem, nullptr, 0, nullptr, 0,
                                 GRPC_ERROR_REF(error));
   }
@@ -159,9 +159,9 @@ static void cancel_call(void* arg, grpc_error* error) {
 }
 
 static void recv_initial_metadata_ready(void* arg, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)arg;
-  channel_data* chand = (channel_data*)elem->channel_data;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(arg);
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   grpc_transport_stream_op_batch* batch = calld->recv_initial_metadata_batch;
   if (error == GRPC_ERROR_NONE) {
     if (chand->creds != nullptr && chand->creds->processor.process != nullptr) {
@@ -187,7 +187,7 @@ static void recv_initial_metadata_ready(void* arg, grpc_error* error) {
 
 static void auth_start_transport_stream_op_batch(
     grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (batch->recv_initial_metadata) {
     // Inject our callback.
     calld->recv_initial_metadata_batch = batch;
@@ -202,8 +202,8 @@ static void auth_start_transport_stream_op_batch(
 /* Constructor for call_data */
 static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
-  call_data* calld = (call_data*)elem->call_data;
-  channel_data* chand = (channel_data*)elem->channel_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   calld->call_combiner = args->call_combiner;
   calld->owning_call = args->call_stack;
   GRPC_CLOSURE_INIT(&calld->recv_initial_metadata_ready,
@@ -234,7 +234,7 @@ static void destroy_call_elem(grpc_call_element* elem,
 static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
   GPR_ASSERT(!args->is_last);
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   grpc_auth_context* auth_context =
       grpc_find_auth_context_in_args(args->channel_args);
   GPR_ASSERT(auth_context != nullptr);
@@ -248,7 +248,7 @@ static grpc_error* init_channel_elem(grpc_channel_element* elem,
 
 /* Destructor for channel data */
 static void destroy_channel_elem(grpc_channel_element* elem) {
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   GRPC_AUTH_CONTEXT_UNREF(chand->auth_context, "server_auth_filter");
   grpc_server_credentials_unref(chand->creds);
 }
diff --git a/src/core/lib/slice/b64.cc b/src/core/lib/slice/b64.cc
index 5c6610c372..3e19b7197f 100644
--- a/src/core/lib/slice/b64.cc
+++ b/src/core/lib/slice/b64.cc
@@ -58,7 +58,7 @@ char* grpc_base64_encode(const void* vdata, size_t data_size, int url_safe,
                          int multiline) {
   size_t result_projected_size =
       grpc_base64_estimate_encoded_size(data_size, url_safe, multiline);
-  char* result = (char*)gpr_malloc(result_projected_size);
+  char* result = static_cast<char*>(gpr_malloc(result_projected_size));
   grpc_base64_encode_core(result, vdata, data_size, url_safe, multiline);
   return result;
 }
@@ -75,7 +75,7 @@ size_t grpc_base64_estimate_encoded_size(size_t data_size, int url_safe,
 
 void grpc_base64_encode_core(char* result, const void* vdata, size_t data_size,
                              int url_safe, int multiline) {
-  const unsigned char* data = (const unsigned char*)vdata;
+  const unsigned char* data = static_cast<const unsigned char*>(vdata);
   const char* base64_chars =
       url_safe ? base64_url_safe_chars : base64_url_unsafe_chars;
   const size_t result_projected_size =
@@ -128,16 +128,18 @@ grpc_slice grpc_base64_decode(const char* b64, int url_safe) {
 
 static void decode_one_char(const unsigned char* codes, unsigned char* result,
                             size_t* result_offset) {
-  uint32_t packed = ((uint32_t)codes[0] << 2) | ((uint32_t)codes[1] >> 4);
-  result[(*result_offset)++] = (unsigned char)packed;
+  uint32_t packed = (static_cast<uint32_t>(codes[0]) << 2) |
+                    (static_cast<uint32_t>(codes[1]) >> 4);
+  result[(*result_offset)++] = static_cast<unsigned char>(packed);
 }
 
 static void decode_two_chars(const unsigned char* codes, unsigned char* result,
                              size_t* result_offset) {
-  uint32_t packed = ((uint32_t)codes[0] << 10) | ((uint32_t)codes[1] << 4) |
-                    ((uint32_t)codes[2] >> 2);
-  result[(*result_offset)++] = (unsigned char)(packed >> 8);
-  result[(*result_offset)++] = (unsigned char)(packed);
+  uint32_t packed = (static_cast<uint32_t>(codes[0]) << 10) |
+                    (static_cast<uint32_t>(codes[1]) << 4) |
+                    (static_cast<uint32_t>(codes[2]) >> 2);
+  result[(*result_offset)++] = static_cast<unsigned char>(packed >> 8);
+  result[(*result_offset)++] = static_cast<unsigned char>(packed);
 }
 
 static int decode_group(const unsigned char* codes, size_t num_codes,
@@ -175,11 +177,12 @@ static int decode_group(const unsigned char* codes, size_t num_codes,
     decode_two_chars(codes, result, result_offset);
   } else {
     /* No padding. */
-    uint32_t packed = ((uint32_t)codes[0] << 18) | ((uint32_t)codes[1] << 12) |
-                      ((uint32_t)codes[2] << 6) | codes[3];
-    result[(*result_offset)++] = (unsigned char)(packed >> 16);
-    result[(*result_offset)++] = (unsigned char)(packed >> 8);
-    result[(*result_offset)++] = (unsigned char)(packed);
+    uint32_t packed = (static_cast<uint32_t>(codes[0]) << 18) |
+                      (static_cast<uint32_t>(codes[1]) << 12) |
+                      (static_cast<uint32_t>(codes[2]) << 6) | codes[3];
+    result[(*result_offset)++] = static_cast<unsigned char>(packed >> 16);
+    result[(*result_offset)++] = static_cast<unsigned char>(packed >> 8);
+    result[(*result_offset)++] = static_cast<unsigned char>(packed);
   }
   return 1;
 }
@@ -193,7 +196,7 @@ grpc_slice grpc_base64_decode_with_len(const char* b64, size_t b64_len,
   size_t num_codes = 0;
 
   while (b64_len--) {
-    unsigned char c = (unsigned char)(*b64++);
+    unsigned char c = static_cast<unsigned char>(*b64++);
     signed char code;
     if (c >= GPR_ARRAY_SIZE(base64_bytes)) continue;
     if (url_safe) {
@@ -214,7 +217,7 @@ grpc_slice grpc_base64_decode_with_len(const char* b64, size_t b64_len,
         goto fail;
       }
     } else {
-      codes[num_codes++] = (unsigned char)code;
+      codes[num_codes++] = static_cast<unsigned char>(code);
       if (num_codes == 4) {
         if (!decode_group(codes, num_codes, current, &result_size)) goto fail;
         num_codes = 0;
diff --git a/src/core/lib/slice/percent_encoding.cc b/src/core/lib/slice/percent_encoding.cc
index 894e43b191..84fb554454 100644
--- a/src/core/lib/slice/percent_encoding.cc
+++ b/src/core/lib/slice/percent_encoding.cc
@@ -78,9 +78,9 @@ static bool valid_hex(const uint8_t* p, const uint8_t* end) {
 }
 
 static uint8_t dehex(uint8_t c) {
-  if (c >= '0' && c <= '9') return (uint8_t)(c - '0');
-  if (c >= 'A' && c <= 'F') return (uint8_t)(c - 'A' + 10);
-  if (c >= 'a' && c <= 'f') return (uint8_t)(c - 'a' + 10);
+  if (c >= '0' && c <= '9') return static_cast<uint8_t>(c - '0');
+  if (c >= 'A' && c <= 'F') return static_cast<uint8_t>(c - 'A' + 10);
+  if (c >= 'a' && c <= 'f') return static_cast<uint8_t>(c - 'a' + 10);
   GPR_UNREACHABLE_CODE(return 255);
 }
 
@@ -114,7 +114,7 @@ bool grpc_strict_percent_decode_slice(grpc_slice slice_in,
   uint8_t* q = GRPC_SLICE_START_PTR(*slice_out);
   while (p != in_end) {
     if (*p == '%') {
-      *q++ = (uint8_t)(dehex(p[1]) << 4) | (dehex(p[2]));
+      *q++ = static_cast<uint8_t>(dehex(p[1]) << 4) | (dehex(p[2]));
       p += 3;
     } else {
       *q++ = *p++;
@@ -155,7 +155,7 @@ grpc_slice grpc_permissive_percent_decode_slice(grpc_slice slice_in) {
       if (!valid_hex(p + 1, in_end) || !valid_hex(p + 2, in_end)) {
         *q++ = *p++;
       } else {
-        *q++ = (uint8_t)(dehex(p[1]) << 4) | (dehex(p[2]));
+        *q++ = static_cast<uint8_t>(dehex(p[1]) << 4) | (dehex(p[2]));
         p += 3;
       }
     } else {
diff --git a/src/core/lib/slice/slice.cc b/src/core/lib/slice/slice.cc
index 1eb15290eb..476d941fbb 100644
--- a/src/core/lib/slice/slice.cc
+++ b/src/core/lib/slice/slice.cc
@@ -27,7 +27,7 @@
 #include "src/core/lib/iomgr/exec_ctx.h"
 
 char* grpc_slice_to_c_string(grpc_slice slice) {
-  char* out = (char*)gpr_malloc(GRPC_SLICE_LENGTH(slice) + 1);
+  char* out = static_cast<char*>(gpr_malloc(GRPC_SLICE_LENGTH(slice) + 1));
   memcpy(out, GRPC_SLICE_START_PTR(slice), GRPC_SLICE_LENGTH(slice));
   out[GRPC_SLICE_LENGTH(slice)] = 0;
   return out;
@@ -104,12 +104,12 @@ typedef struct new_slice_refcount {
 } new_slice_refcount;
 
 static void new_slice_ref(void* p) {
-  new_slice_refcount* r = (new_slice_refcount*)p;
+  new_slice_refcount* r = static_cast<new_slice_refcount*>(p);
   gpr_ref(&r->refs);
 }
 
 static void new_slice_unref(void* p) {
-  new_slice_refcount* r = (new_slice_refcount*)p;
+  new_slice_refcount* r = static_cast<new_slice_refcount*>(p);
   if (gpr_unref(&r->refs)) {
     r->user_destroy(r->user_data);
     gpr_free(r);
@@ -125,7 +125,7 @@ grpc_slice grpc_slice_new_with_user_data(void* p, size_t len,
                                          void* user_data) {
   grpc_slice slice;
   new_slice_refcount* rc =
-      (new_slice_refcount*)gpr_malloc(sizeof(new_slice_refcount));
+      static_cast<new_slice_refcount*>(gpr_malloc(sizeof(new_slice_refcount)));
   gpr_ref_init(&rc->refs, 1);
   rc->rc.vtable = &new_slice_vtable;
   rc->rc.sub_refcount = &rc->rc;
@@ -133,7 +133,7 @@ grpc_slice grpc_slice_new_with_user_data(void* p, size_t len,
   rc->user_data = user_data;
 
   slice.refcount = &rc->rc;
-  slice.data.refcounted.bytes = (uint8_t*)p;
+  slice.data.refcounted.bytes = static_cast<uint8_t*>(p);
   slice.data.refcounted.length = len;
   return slice;
 }
@@ -154,12 +154,12 @@ typedef struct new_with_len_slice_refcount {
 } new_with_len_slice_refcount;
 
 static void new_with_len_ref(void* p) {
-  new_with_len_slice_refcount* r = (new_with_len_slice_refcount*)p;
+  new_with_len_slice_refcount* r = static_cast<new_with_len_slice_refcount*>(p);
   gpr_ref(&r->refs);
 }
 
 static void new_with_len_unref(void* p) {
-  new_with_len_slice_refcount* r = (new_with_len_slice_refcount*)p;
+  new_with_len_slice_refcount* r = static_cast<new_with_len_slice_refcount*>(p);
   if (gpr_unref(&r->refs)) {
     r->user_destroy(r->user_data, r->user_length);
     gpr_free(r);
@@ -173,8 +173,8 @@ static const grpc_slice_refcount_vtable new_with_len_vtable = {
 grpc_slice grpc_slice_new_with_len(void* p, size_t len,
                                    void (*destroy)(void*, size_t)) {
   grpc_slice slice;
-  new_with_len_slice_refcount* rc = (new_with_len_slice_refcount*)gpr_malloc(
-      sizeof(new_with_len_slice_refcount));
+  new_with_len_slice_refcount* rc = static_cast<new_with_len_slice_refcount*>(
+      gpr_malloc(sizeof(new_with_len_slice_refcount)));
   gpr_ref_init(&rc->refs, 1);
   rc->rc.vtable = &new_with_len_vtable;
   rc->rc.sub_refcount = &rc->rc;
@@ -183,7 +183,7 @@ grpc_slice grpc_slice_new_with_len(void* p, size_t len,
   rc->user_length = len;
 
   slice.refcount = &rc->rc;
-  slice.data.refcounted.bytes = (uint8_t*)p;
+  slice.data.refcounted.bytes = static_cast<uint8_t*>(p);
   slice.data.refcounted.length = len;
   return slice;
 }
@@ -205,12 +205,12 @@ typedef struct {
 } malloc_refcount;
 
 static void malloc_ref(void* p) {
-  malloc_refcount* r = (malloc_refcount*)p;
+  malloc_refcount* r = static_cast<malloc_refcount*>(p);
   gpr_ref(&r->refs);
 }
 
 static void malloc_unref(void* p) {
-  malloc_refcount* r = (malloc_refcount*)p;
+  malloc_refcount* r = static_cast<malloc_refcount*>(p);
   if (gpr_unref(&r->refs)) {
     gpr_free(r);
   }
@@ -232,8 +232,8 @@ grpc_slice grpc_slice_malloc_large(size_t length) {
      refcount is a malloc_refcount
      bytes is an array of bytes of the requested length
      Both parts are placed in the same allocation returned from gpr_malloc */
-  malloc_refcount* rc =
-      (malloc_refcount*)gpr_malloc(sizeof(malloc_refcount) + length);
+  malloc_refcount* rc = static_cast<malloc_refcount*>(
+      gpr_malloc(sizeof(malloc_refcount) + length));
 
   /* Initial refcount on rc is 1 - and it's up to the caller to release
      this reference. */
@@ -246,7 +246,7 @@ grpc_slice grpc_slice_malloc_large(size_t length) {
   /* The slices refcount points back to the allocated block. */
   slice.refcount = &rc->base;
   /* The data bytes are placed immediately after the refcount struct */
-  slice.data.refcounted.bytes = (uint8_t*)(rc + 1);
+  slice.data.refcounted.bytes = reinterpret_cast<uint8_t*>(rc + 1);
   /* And the length of the block is set to the requested length */
   slice.data.refcounted.length = length;
   return slice;
@@ -260,7 +260,7 @@ grpc_slice grpc_slice_malloc(size_t length) {
   } else {
     /* small slice: just inline the data */
     slice.refcount = nullptr;
-    slice.data.inlined.length = (uint8_t)length;
+    slice.data.inlined.length = static_cast<uint8_t>(length);
   }
   return slice;
 }
@@ -283,7 +283,7 @@ grpc_slice grpc_slice_sub_no_ref(grpc_slice source, size_t begin, size_t end) {
     /* Enforce preconditions */
     GPR_ASSERT(source.data.inlined.length >= end);
     subset.refcount = nullptr;
-    subset.data.inlined.length = (uint8_t)(end - begin);
+    subset.data.inlined.length = static_cast<uint8_t>(end - begin);
     memcpy(subset.data.inlined.bytes, source.data.inlined.bytes + begin,
            end - begin);
   }
@@ -295,7 +295,7 @@ grpc_slice grpc_slice_sub(grpc_slice source, size_t begin, size_t end) {
 
   if (end - begin <= sizeof(subset.data.inlined.bytes)) {
     subset.refcount = nullptr;
-    subset.data.inlined.length = (uint8_t)(end - begin);
+    subset.data.inlined.length = static_cast<uint8_t>(end - begin);
     memcpy(subset.data.inlined.bytes, GRPC_SLICE_START_PTR(source) + begin,
            end - begin);
   } else {
@@ -314,10 +314,11 @@ grpc_slice grpc_slice_split_tail_maybe_ref(grpc_slice* source, size_t split,
     /* inlined data, copy it out */
     GPR_ASSERT(source->data.inlined.length >= split);
     tail.refcount = nullptr;
-    tail.data.inlined.length = (uint8_t)(source->data.inlined.length - split);
+    tail.data.inlined.length =
+        static_cast<uint8_t>(source->data.inlined.length - split);
     memcpy(tail.data.inlined.bytes, source->data.inlined.bytes + split,
            tail.data.inlined.length);
-    source->data.inlined.length = (uint8_t)split;
+    source->data.inlined.length = static_cast<uint8_t>(split);
   } else {
     size_t tail_length = source->data.refcounted.length - split;
     GPR_ASSERT(source->data.refcounted.length >= split);
@@ -325,7 +326,7 @@ grpc_slice grpc_slice_split_tail_maybe_ref(grpc_slice* source, size_t split,
         ref_whom != GRPC_SLICE_REF_TAIL) {
       /* Copy out the bytes - it'll be cheaper than refcounting */
       tail.refcount = nullptr;
-      tail.data.inlined.length = (uint8_t)tail_length;
+      tail.data.inlined.length = static_cast<uint8_t>(tail_length);
       memcpy(tail.data.inlined.bytes, source->data.refcounted.bytes + split,
              tail_length);
       source->refcount = source->refcount->sub_refcount;
@@ -368,17 +369,17 @@ grpc_slice grpc_slice_split_head(grpc_slice* source, size_t split) {
     GPR_ASSERT(source->data.inlined.length >= split);
 
     head.refcount = nullptr;
-    head.data.inlined.length = (uint8_t)split;
+    head.data.inlined.length = static_cast<uint8_t>(split);
     memcpy(head.data.inlined.bytes, source->data.inlined.bytes, split);
     source->data.inlined.length =
-        (uint8_t)(source->data.inlined.length - split);
+        static_cast<uint8_t>(source->data.inlined.length - split);
     memmove(source->data.inlined.bytes, source->data.inlined.bytes + split,
             source->data.inlined.length);
   } else if (split < sizeof(head.data.inlined.bytes)) {
     GPR_ASSERT(source->data.refcounted.length >= split);
 
     head.refcount = nullptr;
-    head.data.inlined.length = (uint8_t)split;
+    head.data.inlined.length = static_cast<uint8_t>(split);
     memcpy(head.data.inlined.bytes, source->data.refcounted.bytes, split);
     source->refcount = source->refcount->sub_refcount;
     source->data.refcounted.bytes += split;
@@ -416,7 +417,7 @@ int grpc_slice_eq(grpc_slice a, grpc_slice b) {
 }
 
 int grpc_slice_cmp(grpc_slice a, grpc_slice b) {
-  int d = (int)(GRPC_SLICE_LENGTH(a) - GRPC_SLICE_LENGTH(b));
+  int d = static_cast<int>(GRPC_SLICE_LENGTH(a) - GRPC_SLICE_LENGTH(b));
   if (d != 0) return d;
   return memcmp(GRPC_SLICE_START_PTR(a), GRPC_SLICE_START_PTR(b),
                 GRPC_SLICE_LENGTH(a));
@@ -424,7 +425,7 @@ int grpc_slice_cmp(grpc_slice a, grpc_slice b) {
 
 int grpc_slice_str_cmp(grpc_slice a, const char* b) {
   size_t b_length = strlen(b);
-  int d = (int)(GRPC_SLICE_LENGTH(a) - b_length);
+  int d = static_cast<int>(GRPC_SLICE_LENGTH(a) - b_length);
   if (d != 0) return d;
   return memcmp(GRPC_SLICE_START_PTR(a), b, b_length);
 }
@@ -443,17 +444,17 @@ int grpc_slice_buf_start_eq(grpc_slice a, const void* b, size_t len) {
 }
 
 int grpc_slice_rchr(grpc_slice s, char c) {
-  const char* b = (const char*)GRPC_SLICE_START_PTR(s);
+  const char* b = reinterpret_cast<const char*> GRPC_SLICE_START_PTR(s);
   int i;
-  for (i = (int)GRPC_SLICE_LENGTH(s) - 1; i != -1 && b[i] != c; i--)
+  for (i = static_cast<int> GRPC_SLICE_LENGTH(s) - 1; i != -1 && b[i] != c; i--)
     ;
   return i;
 }
 
 int grpc_slice_chr(grpc_slice s, char c) {
-  const char* b = (const char*)GRPC_SLICE_START_PTR(s);
-  const char* p = (const char*)memchr(b, c, GRPC_SLICE_LENGTH(s));
-  return p == nullptr ? -1 : (int)(p - b);
+  const char* b = reinterpret_cast<const char*> GRPC_SLICE_START_PTR(s);
+  const char* p = static_cast<const char*>(memchr(b, c, GRPC_SLICE_LENGTH(s)));
+  return p == nullptr ? -1 : static_cast<int>(p - b);
 }
 
 int grpc_slice_slice(grpc_slice haystack, grpc_slice needle) {
@@ -466,12 +467,13 @@ int grpc_slice_slice(grpc_slice haystack, grpc_slice needle) {
   if (haystack_len < needle_len) return -1;
   if (haystack_len == needle_len)
     return grpc_slice_eq(haystack, needle) ? 0 : -1;
-  if (needle_len == 1) return grpc_slice_chr(haystack, (char)*needle_bytes);
+  if (needle_len == 1)
+    return grpc_slice_chr(haystack, static_cast<char>(*needle_bytes));
 
   const uint8_t* last = haystack_bytes + haystack_len - needle_len;
   for (const uint8_t* cur = haystack_bytes; cur != last; ++cur) {
     if (0 == memcmp(cur, needle_bytes, needle_len)) {
-      return (int)(cur - haystack_bytes);
+      return static_cast<int>(cur - haystack_bytes);
     }
   }
   return -1;
diff --git a/src/core/lib/slice/slice_buffer.cc b/src/core/lib/slice/slice_buffer.cc
index 178c7f9e94..0416c9d371 100644
--- a/src/core/lib/slice/slice_buffer.cc
+++ b/src/core/lib/slice/slice_buffer.cc
@@ -32,7 +32,7 @@
 
 static void maybe_embiggen(grpc_slice_buffer* sb) {
   /* How far away from sb->base_slices is sb->slices pointer */
-  size_t slice_offset = (size_t)(sb->slices - sb->base_slices);
+  size_t slice_offset = static_cast<size_t>(sb->slices - sb->base_slices);
   size_t slice_count = sb->count + slice_offset;
 
   if (slice_count == sb->capacity) {
@@ -45,12 +45,12 @@ static void maybe_embiggen(grpc_slice_buffer* sb) {
       sb->capacity = GROW(sb->capacity);
       GPR_ASSERT(sb->capacity > slice_count);
       if (sb->base_slices == sb->inlined) {
-        sb->base_slices =
-            (grpc_slice*)gpr_malloc(sb->capacity * sizeof(grpc_slice));
+        sb->base_slices = static_cast<grpc_slice*>(
+            gpr_malloc(sb->capacity * sizeof(grpc_slice)));
         memcpy(sb->base_slices, sb->inlined, slice_count * sizeof(grpc_slice));
       } else {
-        sb->base_slices = (grpc_slice*)gpr_realloc(
-            sb->base_slices, sb->capacity * sizeof(grpc_slice));
+        sb->base_slices = static_cast<grpc_slice*>(
+            gpr_realloc(sb->base_slices, sb->capacity * sizeof(grpc_slice)));
       }
 
       sb->slices = sb->base_slices + slice_offset;
@@ -89,7 +89,8 @@ uint8_t* grpc_slice_buffer_tiny_add(grpc_slice_buffer* sb, size_t n) {
   if ((back->data.inlined.length + n) > sizeof(back->data.inlined.bytes))
     goto add_new;
   out = back->data.inlined.bytes + back->data.inlined.length;
-  back->data.inlined.length = (uint8_t)(back->data.inlined.length + n);
+  back->data.inlined.length =
+      static_cast<uint8_t>(back->data.inlined.length + n);
   return out;
 
 add_new:
@@ -97,7 +98,7 @@ add_new:
   back = &sb->slices[sb->count];
   sb->count++;
   back->refcount = nullptr;
-  back->data.inlined.length = (uint8_t)n;
+  back->data.inlined.length = static_cast<uint8_t>(n);
   return back->data.inlined.bytes;
 }
 
@@ -125,8 +126,8 @@ void grpc_slice_buffer_add(grpc_slice_buffer* sb, grpc_slice s) {
           GRPC_SLICE_INLINED_SIZE) {
         memcpy(back->data.inlined.bytes + back->data.inlined.length,
                s.data.inlined.bytes, s.data.inlined.length);
-        back->data.inlined.length =
-            (uint8_t)(back->data.inlined.length + s.data.inlined.length);
+        back->data.inlined.length = static_cast<uint8_t>(
+            back->data.inlined.length + s.data.inlined.length);
       } else {
         size_t cp1 = GRPC_SLICE_INLINED_SIZE - back->data.inlined.length;
         memcpy(back->data.inlined.bytes + back->data.inlined.length,
@@ -136,7 +137,8 @@ void grpc_slice_buffer_add(grpc_slice_buffer* sb, grpc_slice s) {
         back = &sb->slices[n];
         sb->count = n + 1;
         back->refcount = nullptr;
-        back->data.inlined.length = (uint8_t)(s.data.inlined.length - cp1);
+        back->data.inlined.length =
+            static_cast<uint8_t>(s.data.inlined.length - cp1);
         memcpy(back->data.inlined.bytes, s.data.inlined.bytes + cp1,
                s.data.inlined.length - cp1);
       }
@@ -177,8 +179,8 @@ void grpc_slice_buffer_reset_and_unref(grpc_slice_buffer* sb) {
 }
 
 void grpc_slice_buffer_swap(grpc_slice_buffer* a, grpc_slice_buffer* b) {
-  size_t a_offset = (size_t)(a->slices - a->base_slices);
-  size_t b_offset = (size_t)(b->slices - b->base_slices);
+  size_t a_offset = static_cast<size_t>(a->slices - a->base_slices);
+  size_t b_offset = static_cast<size_t>(b->slices - b->base_slices);
 
   size_t a_count = a->count + a_offset;
   size_t b_count = b->count + b_offset;
@@ -287,7 +289,7 @@ void grpc_slice_buffer_move_first_no_ref(grpc_slice_buffer* src, size_t n,
 
 void grpc_slice_buffer_move_first_into_buffer(grpc_slice_buffer* src, size_t n,
                                               void* dst) {
-  char* dstp = (char*)dst;
+  char* dstp = static_cast<char*>(dst);
   GPR_ASSERT(src->length >= n);
 
   while (n > 0) {
diff --git a/src/core/lib/slice/slice_hash_table.cc b/src/core/lib/slice/slice_hash_table.cc
index 89340eff84..2342e90485 100644
--- a/src/core/lib/slice/slice_hash_table.cc
+++ b/src/core/lib/slice/slice_hash_table.cc
@@ -60,14 +60,15 @@ grpc_slice_hash_table* grpc_slice_hash_table_create(
     size_t num_entries, grpc_slice_hash_table_entry* entries,
     void (*destroy_value)(void* value), int (*value_cmp)(void* a, void* b)) {
   grpc_slice_hash_table* table =
-      (grpc_slice_hash_table*)gpr_zalloc(sizeof(*table));
+      static_cast<grpc_slice_hash_table*>(gpr_zalloc(sizeof(*table)));
   gpr_ref_init(&table->refs, 1);
   table->destroy_value = destroy_value;
   table->value_cmp = value_cmp;
   // Keep load factor low to improve performance of lookups.
   table->size = num_entries * 2;
   const size_t entry_size = sizeof(grpc_slice_hash_table_entry) * table->size;
-  table->entries = (grpc_slice_hash_table_entry*)gpr_zalloc(entry_size);
+  table->entries =
+      static_cast<grpc_slice_hash_table_entry*>(gpr_zalloc(entry_size));
   for (size_t i = 0; i < num_entries; ++i) {
     grpc_slice_hash_table_entry* entry = &entries[i];
     grpc_slice_hash_table_add(table, entry->key, entry->value);
diff --git a/src/core/lib/slice/slice_intern.cc b/src/core/lib/slice/slice_intern.cc
index cf471f30f8..2d633c4903 100644
--- a/src/core/lib/slice/slice_intern.cc
+++ b/src/core/lib/slice/slice_intern.cc
@@ -70,7 +70,7 @@ static uint32_t max_static_metadata_hash_probe;
 static uint32_t static_metadata_hash_values[GRPC_STATIC_MDSTR_COUNT];
 
 static void interned_slice_ref(void* p) {
-  interned_slice_refcount* s = (interned_slice_refcount*)p;
+  interned_slice_refcount* s = static_cast<interned_slice_refcount*>(p);
   GPR_ASSERT(gpr_atm_no_barrier_fetch_add(&s->refcnt, 1) > 0);
 }
 
@@ -91,22 +91,25 @@ static void interned_slice_destroy(interned_slice_refcount* s) {
 }
 
 static void interned_slice_unref(void* p) {
-  interned_slice_refcount* s = (interned_slice_refcount*)p;
+  interned_slice_refcount* s = static_cast<interned_slice_refcount*>(p);
   if (1 == gpr_atm_full_fetch_add(&s->refcnt, -1)) {
     interned_slice_destroy(s);
   }
 }
 
 static void interned_slice_sub_ref(void* p) {
-  interned_slice_ref(((char*)p) - offsetof(interned_slice_refcount, sub));
+  interned_slice_ref((static_cast<char*>(p)) -
+                     offsetof(interned_slice_refcount, sub));
 }
 
 static void interned_slice_sub_unref(void* p) {
-  interned_slice_unref(((char*)p) - offsetof(interned_slice_refcount, sub));
+  interned_slice_unref((static_cast<char*>(p)) -
+                       offsetof(interned_slice_refcount, sub));
 }
 
 static uint32_t interned_slice_hash(grpc_slice slice) {
-  interned_slice_refcount* s = (interned_slice_refcount*)slice.refcount;
+  interned_slice_refcount* s =
+      reinterpret_cast<interned_slice_refcount*>(slice.refcount);
   return s->hash;
 }
 
@@ -129,8 +132,8 @@ static void grow_shard(slice_shard* shard) {
   interned_slice_refcount** strtab;
   interned_slice_refcount *s, *next;
 
-  strtab = (interned_slice_refcount**)gpr_zalloc(
-      sizeof(interned_slice_refcount*) * capacity);
+  strtab = static_cast<interned_slice_refcount**>(
+      gpr_zalloc(sizeof(interned_slice_refcount*) * capacity));
 
   for (i = 0; i < shard->capacity; i++) {
     for (s = shard->strs[i]; s; s = next) {
@@ -148,7 +151,7 @@ static void grow_shard(slice_shard* shard) {
 static grpc_slice materialize(interned_slice_refcount* s) {
   grpc_slice slice;
   slice.refcount = &s->base;
-  slice.data.refcounted.bytes = (uint8_t*)(s + 1);
+  slice.data.refcounted.bytes = reinterpret_cast<uint8_t*>(s + 1);
   slice.data.refcounted.length = s->length;
   return slice;
 }
@@ -237,8 +240,8 @@ grpc_slice grpc_slice_intern(grpc_slice slice) {
 
   /* not found: create a new string */
   /* string data goes after the internal_string header */
-  s = (interned_slice_refcount*)gpr_malloc(sizeof(*s) +
-                                           GRPC_SLICE_LENGTH(slice));
+  s = static_cast<interned_slice_refcount*>(
+      gpr_malloc(sizeof(*s) + GRPC_SLICE_LENGTH(slice)));
   gpr_atm_rel_store(&s->refcnt, 1);
   s->length = GRPC_SLICE_LENGTH(slice);
   s->hash = hash;
@@ -268,15 +271,15 @@ void grpc_test_only_set_slice_hash_seed(uint32_t seed) {
 
 void grpc_slice_intern_init(void) {
   if (!g_forced_hash_seed) {
-    g_hash_seed = (uint32_t)gpr_now(GPR_CLOCK_REALTIME).tv_nsec;
+    g_hash_seed = static_cast<uint32_t>(gpr_now(GPR_CLOCK_REALTIME).tv_nsec);
   }
   for (size_t i = 0; i < SHARD_COUNT; i++) {
     slice_shard* shard = &g_shards[i];
     gpr_mu_init(&shard->mu);
     shard->count = 0;
     shard->capacity = INITIAL_SHARD_CAPACITY;
-    shard->strs = (interned_slice_refcount**)gpr_zalloc(sizeof(*shard->strs) *
-                                                        shard->capacity);
+    shard->strs = static_cast<interned_slice_refcount**>(
+        gpr_zalloc(sizeof(*shard->strs) * shard->capacity));
   }
   for (size_t i = 0; i < GPR_ARRAY_SIZE(static_metadata_hash); i++) {
     static_metadata_hash[i].hash = 0;
@@ -291,9 +294,9 @@ void grpc_slice_intern_init(void) {
                     GPR_ARRAY_SIZE(static_metadata_hash);
       if (static_metadata_hash[slot].idx == GRPC_STATIC_MDSTR_COUNT) {
         static_metadata_hash[slot].hash = static_metadata_hash_values[i];
-        static_metadata_hash[slot].idx = (uint32_t)i;
+        static_metadata_hash[slot].idx = static_cast<uint32_t>(i);
         if (j > max_static_metadata_hash_probe) {
-          max_static_metadata_hash_probe = (uint32_t)j;
+          max_static_metadata_hash_probe = static_cast<uint32_t>(j);
         }
         break;
       }
diff --git a/src/core/lib/slice/slice_string_helpers.cc b/src/core/lib/slice/slice_string_helpers.cc
index 4441a26d8e..f91ece3b98 100644
--- a/src/core/lib/slice/slice_string_helpers.cc
+++ b/src/core/lib/slice/slice_string_helpers.cc
@@ -26,8 +26,8 @@
 #include "src/core/lib/slice/slice_internal.h"
 
 char* grpc_dump_slice(grpc_slice s, uint32_t flags) {
-  return gpr_dump((const char*)GRPC_SLICE_START_PTR(s), GRPC_SLICE_LENGTH(s),
-                  flags);
+  return gpr_dump(reinterpret_cast<const char*> GRPC_SLICE_START_PTR(s),
+                  GRPC_SLICE_LENGTH(s), flags);
 }
 
 /** Finds the initial (\a begin) and final (\a end) offsets of the next
@@ -110,6 +110,7 @@ void grpc_slice_split_without_space(grpc_slice str, const char* sep,
 }
 
 bool grpc_parse_slice_to_uint32(grpc_slice str, uint32_t* result) {
-  return gpr_parse_bytes_to_uint32((const char*)GRPC_SLICE_START_PTR(str),
-                                   GRPC_SLICE_LENGTH(str), result) != 0;
+  return gpr_parse_bytes_to_uint32(
+             reinterpret_cast<const char*> GRPC_SLICE_START_PTR(str),
+             GRPC_SLICE_LENGTH(str), result) != 0;
 }
diff --git a/src/core/lib/surface/byte_buffer.cc b/src/core/lib/surface/byte_buffer.cc
index e4c2a4a4c2..01cbf7354a 100644
--- a/src/core/lib/surface/byte_buffer.cc
+++ b/src/core/lib/surface/byte_buffer.cc
@@ -33,7 +33,7 @@ grpc_byte_buffer* grpc_raw_compressed_byte_buffer_create(
     grpc_compression_algorithm compression) {
   size_t i;
   grpc_byte_buffer* bb =
-      (grpc_byte_buffer*)gpr_malloc(sizeof(grpc_byte_buffer));
+      static_cast<grpc_byte_buffer*>(gpr_malloc(sizeof(grpc_byte_buffer)));
   bb->type = GRPC_BB_RAW;
   bb->data.raw.compression = compression;
   grpc_slice_buffer_init(&bb->data.raw.slice_buffer);
@@ -47,7 +47,7 @@ grpc_byte_buffer* grpc_raw_compressed_byte_buffer_create(
 grpc_byte_buffer* grpc_raw_byte_buffer_from_reader(
     grpc_byte_buffer_reader* reader) {
   grpc_byte_buffer* bb =
-      (grpc_byte_buffer*)gpr_malloc(sizeof(grpc_byte_buffer));
+      static_cast<grpc_byte_buffer*>(gpr_malloc(sizeof(grpc_byte_buffer)));
   grpc_slice slice;
   bb->type = GRPC_BB_RAW;
   bb->data.raw.compression = GRPC_COMPRESS_NONE;
diff --git a/src/core/lib/surface/call.cc b/src/core/lib/surface/call.cc
index a7b932b46d..2d5077525c 100644
--- a/src/core/lib/surface/call.cc
+++ b/src/core/lib/surface/call.cc
@@ -97,7 +97,7 @@ static received_status unpack_received_status(gpr_atm atm) {
   if ((atm & 1) == 0) {
     return {false, GRPC_ERROR_NONE};
   } else {
-    return {true, (grpc_error*)(atm & ~(gpr_atm)1)};
+    return {true, (grpc_error*)(atm & ~static_cast<gpr_atm>(1))};
   }
 }
 
@@ -304,7 +304,7 @@ void* grpc_call_arena_alloc(grpc_call* call, size_t size) {
 static parent_call* get_or_create_parent_call(grpc_call* call) {
   parent_call* p = (parent_call*)gpr_atm_acq_load(&call->parent_call_atm);
   if (p == nullptr) {
-    p = (parent_call*)gpr_arena_alloc(call->arena, sizeof(*p));
+    p = static_cast<parent_call*>(gpr_arena_alloc(call->arena, sizeof(*p)));
     gpr_mu_init(&p->child_list_mu);
     if (!gpr_atm_rel_cas(&call->parent_call_atm, (gpr_atm) nullptr,
                          (gpr_atm)p)) {
@@ -330,8 +330,8 @@ grpc_error* grpc_call_create(const grpc_call_create_args* args,
   size_t initial_size = grpc_channel_get_call_size_estimate(args->channel);
   GRPC_STATS_INC_CALL_INITIAL_SIZE(initial_size);
   gpr_arena* arena = gpr_arena_create(initial_size);
-  call = (grpc_call*)gpr_arena_alloc(
-      arena, sizeof(grpc_call) + channel_stack->call_stack_size);
+  call = static_cast<grpc_call*>(gpr_arena_alloc(
+      arena, sizeof(grpc_call) + channel_stack->call_stack_size));
   gpr_ref_init(&call->ext_ref, 1);
   call->arena = arena;
   grpc_call_combiner_init(&call->call_combiner);
@@ -360,7 +360,8 @@ grpc_error* grpc_call_create(const grpc_call_create_args* args,
             GRPC_MDVALUE(args->add_initial_metadata[i]));
       }
     }
-    call->send_extra_metadata_count = (int)args->add_initial_metadata_count;
+    call->send_extra_metadata_count =
+        static_cast<int>(args->add_initial_metadata_count);
   } else {
     GPR_ASSERT(args->add_initial_metadata_count == 0);
     call->send_extra_metadata_count = 0;
@@ -376,7 +377,7 @@ grpc_error* grpc_call_create(const grpc_call_create_args* args,
 
   if (args->parent != nullptr) {
     child_call* cc = call->child =
-        (child_call*)gpr_arena_alloc(arena, sizeof(child_call));
+        static_cast<child_call*>(gpr_arena_alloc(arena, sizeof(child_call)));
     call->child->parent = args->parent;
 
     GRPC_CALL_INTERNAL_REF(args->parent, "child");
@@ -500,7 +501,7 @@ void grpc_call_internal_unref(grpc_call* c REF_ARG) {
 }
 
 static void release_call(void* call, grpc_error* error) {
-  grpc_call* c = (grpc_call*)call;
+  grpc_call* c = static_cast<grpc_call*>(call);
   grpc_channel* channel = c->channel;
   grpc_call_combiner_destroy(&c->call_combiner);
   gpr_free((char*)c->peer_string);
@@ -513,7 +514,7 @@ static void destroy_call(void* call, grpc_error* error) {
   GPR_TIMER_SCOPE("destroy_call", 0);
   size_t i;
   int ii;
-  grpc_call* c = (grpc_call*)call;
+  grpc_call* c = static_cast<grpc_call*>(call);
   for (i = 0; i < 2; i++) {
     grpc_metadata_batch_destroy(
         &c->metadata_batch[1 /* is_receiving */][i /* is_initial */]);
@@ -608,8 +609,9 @@ grpc_call_error grpc_call_cancel(grpc_call* call, void* reserved) {
 // the filter stack.
 static void execute_batch_in_call_combiner(void* arg, grpc_error* ignored) {
   GPR_TIMER_SCOPE("execute_batch", 0);
-  grpc_transport_stream_op_batch* batch = (grpc_transport_stream_op_batch*)arg;
-  grpc_call* call = (grpc_call*)batch->handler_private.extra_arg;
+  grpc_transport_stream_op_batch* batch =
+      static_cast<grpc_transport_stream_op_batch*>(arg);
+  grpc_call* call = static_cast<grpc_call*>(batch->handler_private.extra_arg);
   grpc_call_element* elem = CALL_ELEM_FROM_CALL(call, 0);
   GRPC_CALL_LOG_OP(GPR_INFO, elem, batch);
   elem->filter->start_transport_stream_op_batch(elem, batch);
@@ -667,7 +669,7 @@ typedef struct {
 // The on_complete callback used when sending a cancel_stream batch down
 // the filter stack.  Yields the call combiner when the batch is done.
 static void done_termination(void* arg, grpc_error* error) {
-  cancel_state* state = (cancel_state*)arg;
+  cancel_state* state = static_cast<cancel_state*>(arg);
   GRPC_CALL_COMBINER_STOP(&state->call->call_combiner,
                           "on_complete for cancel_stream op");
   GRPC_CALL_INTERNAL_UNREF(state->call, "termination");
@@ -683,7 +685,7 @@ static void cancel_with_error(grpc_call* c, status_source source,
   // down the filter stack in a timely manner.
   grpc_call_combiner_cancel(&c->call_combiner, GRPC_ERROR_REF(error));
   set_status_from_error(c, source, GRPC_ERROR_REF(error));
-  cancel_state* state = (cancel_state*)gpr_malloc(sizeof(*state));
+  cancel_state* state = static_cast<cancel_state*>(gpr_malloc(sizeof(*state)));
   state->call = c;
   GRPC_CLOSURE_INIT(&state->finish_batch, done_termination, state,
                     grpc_schedule_on_exec_ctx);
@@ -845,7 +847,7 @@ static void set_encodings_accepted_by_peer(grpc_call* call, grpc_mdelem mdel,
       grpc_mdelem_get_user_data(mdel, destroy_encodings_accepted_by_peer);
   if (accepted_user_data != nullptr) {
     *encodings_accepted_by_peer =
-        (uint32_t)(((uintptr_t)accepted_user_data) - 1);
+        static_cast<uint32_t>(((uintptr_t)accepted_user_data) - 1);
     return;
   }
 
@@ -863,11 +865,11 @@ static void set_encodings_accepted_by_peer(grpc_call* call, grpc_mdelem mdel,
     if (!stream_encoding) {
       r = grpc_message_compression_algorithm_parse(
           accept_encoding_entry_slice,
-          (grpc_message_compression_algorithm*)&algorithm);
+          reinterpret_cast<grpc_message_compression_algorithm*>(&algorithm));
     } else {
       r = grpc_stream_compression_algorithm_parse(
           accept_encoding_entry_slice,
-          (grpc_stream_compression_algorithm*)&algorithm);
+          reinterpret_cast<grpc_stream_compression_algorithm*>(&algorithm));
     }
     if (r) {
       GPR_BITSET(encodings_accepted_by_peer, algorithm);
@@ -885,7 +887,7 @@ static void set_encodings_accepted_by_peer(grpc_call* call, grpc_mdelem mdel,
 
   grpc_mdelem_set_user_data(
       mdel, destroy_encodings_accepted_by_peer,
-      (void*)(((uintptr_t)(*encodings_accepted_by_peer)) + 1));
+      (void*)((static_cast<uintptr_t>(*encodings_accepted_by_peer)) + 1));
 }
 
 uint32_t grpc_call_test_only_get_encodings_accepted_by_peer(grpc_call* call) {
@@ -936,7 +938,7 @@ static int prepare_application_metadata(grpc_call* call, int count,
                    grpc_validate_header_nonbin_value_is_legal(md->value))) {
       break;
     }
-    l->md = grpc_mdelem_from_grpc_metadata((grpc_metadata*)md);
+    l->md = grpc_mdelem_from_grpc_metadata(const_cast<grpc_metadata*>(md));
   }
   if (i != total_count) {
     for (int j = 0; j < i; j++) {
@@ -986,13 +988,14 @@ static uint32_t decode_status(grpc_mdelem md) {
   if (grpc_mdelem_eq(md, GRPC_MDELEM_GRPC_STATUS_2)) return 2;
   user_data = grpc_mdelem_get_user_data(md, destroy_status);
   if (user_data != nullptr) {
-    status = ((uint32_t)(intptr_t)user_data) - STATUS_OFFSET;
+    status = (static_cast<uint32_t>((intptr_t)user_data)) - STATUS_OFFSET;
   } else {
     if (!grpc_parse_slice_to_uint32(GRPC_MDVALUE(md), &status)) {
       status = GRPC_STATUS_UNKNOWN; /* could not parse status code */
     }
-    grpc_mdelem_set_user_data(md, destroy_status,
-                              (void*)(intptr_t)(status + STATUS_OFFSET));
+    grpc_mdelem_set_user_data(
+        md, destroy_status,
+        (void*)static_cast<intptr_t>(status + STATUS_OFFSET));
   }
   return status;
 }
@@ -1040,8 +1043,8 @@ static void publish_app_metadata(grpc_call* call, grpc_metadata_batch* b,
   if (dest->count + b->list.count > dest->capacity) {
     dest->capacity =
         GPR_MAX(dest->capacity + b->list.count, dest->capacity * 3 / 2);
-    dest->metadata = (grpc_metadata*)gpr_realloc(
-        dest->metadata, sizeof(grpc_metadata) * dest->capacity);
+    dest->metadata = static_cast<grpc_metadata*>(
+        gpr_realloc(dest->metadata, sizeof(grpc_metadata) * dest->capacity));
   }
   for (grpc_linked_mdelem* l = b->list.head; l != nullptr; l = l->next) {
     mdusr = &dest->metadata[dest->count++];
@@ -1086,7 +1089,7 @@ static void recv_initial_filter(grpc_call* call, grpc_metadata_batch* b) {
 }
 
 static void recv_trailing_filter(void* args, grpc_metadata_batch* b) {
-  grpc_call* call = (grpc_call*)args;
+  grpc_call* call = static_cast<grpc_call*>(args);
   if (b->idx.named.grpc_status != nullptr) {
     uint32_t status_code = decode_status(b->idx.named.grpc_status->md);
     grpc_error* error =
@@ -1095,7 +1098,7 @@ static void recv_trailing_filter(void* args, grpc_metadata_batch* b) {
             : grpc_error_set_int(GRPC_ERROR_CREATE_FROM_STATIC_STRING(
                                      "Error received from peer"),
                                  GRPC_ERROR_INT_GRPC_STATUS,
-                                 (intptr_t)status_code);
+                                 static_cast<intptr_t>(status_code));
     if (b->idx.named.grpc_message != nullptr) {
       error = grpc_error_set_str(
           error, GRPC_ERROR_STR_GRPC_MESSAGE,
@@ -1120,11 +1123,11 @@ grpc_call_stack* grpc_call_get_call_stack(grpc_call* call) {
  */
 
 static void set_status_value_directly(grpc_status_code status, void* dest) {
-  *(grpc_status_code*)dest = status;
+  *static_cast<grpc_status_code*>(dest) = status;
 }
 
 static void set_cancelled_value(grpc_status_code status, void* dest) {
-  *(int*)dest = (status != GRPC_STATUS_OK);
+  *static_cast<int*>(dest) = (status != GRPC_STATUS_OK);
 }
 
 static bool are_write_flags_valid(uint32_t flags) {
@@ -1170,8 +1173,8 @@ static batch_control* allocate_batch_control(grpc_call* call,
   int slot = batch_slot_for_op(ops[0].op);
   batch_control** pslot = &call->active_batches[slot];
   if (*pslot == nullptr) {
-    *pslot =
-        (batch_control*)gpr_arena_alloc(call->arena, sizeof(batch_control));
+    *pslot = static_cast<batch_control*>(
+        gpr_arena_alloc(call->arena, sizeof(batch_control)));
   }
   batch_control* bctl = *pslot;
   if (bctl->call != nullptr) {
@@ -1185,14 +1188,14 @@ static batch_control* allocate_batch_control(grpc_call* call,
 
 static void finish_batch_completion(void* user_data,
                                     grpc_cq_completion* storage) {
-  batch_control* bctl = (batch_control*)user_data;
+  batch_control* bctl = static_cast<batch_control*>(user_data);
   grpc_call* call = bctl->call;
   bctl->call = nullptr;
   GRPC_CALL_INTERNAL_UNREF(call, "completion");
 }
 
 static grpc_error* consolidate_batch_errors(batch_control* bctl) {
-  size_t n = (size_t)gpr_atm_acq_load(&bctl->num_errors);
+  size_t n = static_cast<size_t>(gpr_atm_acq_load(&bctl->num_errors));
   if (n == 0) {
     return GRPC_ERROR_NONE;
   } else if (n == 1) {
@@ -1332,7 +1335,7 @@ static void continue_receiving_slices(batch_control* bctl) {
 }
 
 static void receiving_slice_ready(void* bctlp, grpc_error* error) {
-  batch_control* bctl = (batch_control*)bctlp;
+  batch_control* bctl = static_cast<batch_control*>(bctlp);
   grpc_call* call = bctl->call;
   grpc_byte_stream* bs = call->receiving_stream;
   bool release_error = false;
@@ -1395,7 +1398,7 @@ static void process_data_after_md(batch_control* bctl) {
 }
 
 static void receiving_stream_ready(void* bctlp, grpc_error* error) {
-  batch_control* bctl = (batch_control*)bctlp;
+  batch_control* bctl = static_cast<batch_control*>(bctlp);
   grpc_call* call = bctl->call;
   if (error != GRPC_ERROR_NONE) {
     if (call->receiving_stream != nullptr) {
@@ -1419,7 +1422,7 @@ static void receiving_stream_ready(void* bctlp, grpc_error* error) {
 // before processing the received message.
 static void receiving_stream_ready_in_call_combiner(void* bctlp,
                                                     grpc_error* error) {
-  batch_control* bctl = (batch_control*)bctlp;
+  batch_control* bctl = static_cast<batch_control*>(bctlp);
   grpc_call* call = bctl->call;
   GRPC_CALL_COMBINER_STOP(&call->call_combiner, "recv_message_ready");
   receiving_stream_ready(bctlp, error);
@@ -1495,7 +1498,7 @@ static void validate_filtered_metadata(batch_control* bctl) {
 static void add_batch_error(batch_control* bctl, grpc_error* error,
                             bool has_cancelled) {
   if (error == GRPC_ERROR_NONE) return;
-  int idx = (int)gpr_atm_full_fetch_add(&bctl->num_errors, 1);
+  int idx = static_cast<int>(gpr_atm_full_fetch_add(&bctl->num_errors, 1));
   if (idx == 0 && !has_cancelled) {
     cancel_with_error(bctl->call, STATUS_FROM_CORE, GRPC_ERROR_REF(error));
   }
@@ -1503,7 +1506,7 @@ static void add_batch_error(batch_control* bctl, grpc_error* error,
 }
 
 static void receiving_initial_metadata_ready(void* bctlp, grpc_error* error) {
-  batch_control* bctl = (batch_control*)bctlp;
+  batch_control* bctl = static_cast<batch_control*>(bctlp);
   grpc_call* call = bctl->call;
 
   GRPC_CALL_COMBINER_STOP(&call->call_combiner, "recv_initial_metadata_ready");
@@ -1555,7 +1558,7 @@ static void receiving_initial_metadata_ready(void* bctlp, grpc_error* error) {
 }
 
 static void finish_batch(void* bctlp, grpc_error* error) {
-  batch_control* bctl = (batch_control*)bctlp;
+  batch_control* bctl = static_cast<batch_control*>(bctlp);
   grpc_call* call = bctl->call;
   GRPC_CALL_COMBINER_STOP(&call->call_combiner, "on_complete");
   add_batch_error(bctl, GRPC_ERROR_REF(error), false);
@@ -1584,9 +1587,10 @@ static grpc_call_error call_start_batch(grpc_call* call, const grpc_op* ops,
   if (nops == 0) {
     if (!is_notify_tag_closure) {
       GPR_ASSERT(grpc_cq_begin_op(call->cq, notify_tag));
-      grpc_cq_end_op(
-          call->cq, notify_tag, GRPC_ERROR_NONE, free_no_op_completion, nullptr,
-          (grpc_cq_completion*)gpr_malloc(sizeof(grpc_cq_completion)));
+      grpc_cq_end_op(call->cq, notify_tag, GRPC_ERROR_NONE,
+                     free_no_op_completion, nullptr,
+                     static_cast<grpc_cq_completion*>(
+                         gpr_malloc(sizeof(grpc_cq_completion))));
     } else {
       GRPC_CLOSURE_SCHED((grpc_closure*)notify_tag, GRPC_ERROR_NONE);
     }
@@ -1600,7 +1604,7 @@ static grpc_call_error call_start_batch(grpc_call* call, const grpc_op* ops,
   }
   bctl->completion_data.notify_tag.tag = notify_tag;
   bctl->completion_data.notify_tag.is_closure =
-      (uint8_t)(is_notify_tag_closure != 0);
+      static_cast<uint8_t>(is_notify_tag_closure != 0);
 
   stream_op = &bctl->op;
   stream_op_payload = &call->stream_op_payload;
@@ -1660,9 +1664,10 @@ static grpc_call_error call_start_batch(grpc_call* call, const grpc_op* ops,
         stream_op->send_initial_metadata = true;
         call->sent_initial_metadata = true;
         if (!prepare_application_metadata(
-                call, (int)op->data.send_initial_metadata.count,
+                call, static_cast<int>(op->data.send_initial_metadata.count),
                 op->data.send_initial_metadata.metadata, 0, call->is_client,
-                &call->compression_md, (int)additional_metadata_count)) {
+                &call->compression_md,
+                static_cast<int>(additional_metadata_count))) {
           error = GRPC_CALL_ERROR_INVALID_METADATA;
           goto done_with_error;
         }
@@ -1779,7 +1784,8 @@ static grpc_call_error call_start_batch(grpc_call* call, const grpc_op* ops,
         }
         if (!prepare_application_metadata(
                 call,
-                (int)op->data.send_status_from_server.trailing_metadata_count,
+                static_cast<int>(
+                    op->data.send_status_from_server.trailing_metadata_count),
                 op->data.send_status_from_server.trailing_metadata, 1, 1,
                 nullptr, 0)) {
           for (int n = 0; n < call->send_extra_metadata_count; n++) {
diff --git a/src/core/lib/surface/channel.cc b/src/core/lib/surface/channel.cc
index 679666bc5f..d536027c08 100644
--- a/src/core/lib/surface/channel.cc
+++ b/src/core/lib/surface/channel.cc
@@ -85,7 +85,7 @@ grpc_channel* grpc_channel_create_with_builder(
   }
   grpc_error* error = grpc_channel_stack_builder_finish(
       builder, sizeof(grpc_channel), 1, destroy_channel, nullptr,
-      (void**)&channel);
+      reinterpret_cast<void**>(&channel));
   if (error != GRPC_ERROR_NONE) {
     gpr_log(GPR_ERROR, "channel stack builder failed: %s",
             grpc_error_string(error));
@@ -157,7 +157,7 @@ grpc_channel* grpc_channel_create_with_builder(
                strcmp(args->args[i].key,
                       GRPC_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET)) {
       channel->compression_options.enabled_algorithms_bitset =
-          (uint32_t)args->args[i].value.integer |
+          static_cast<uint32_t>(args->args[i].value.integer) |
           0x1; /* always support no compression */
     }
   }
@@ -190,26 +190,29 @@ size_t grpc_channel_get_call_size_estimate(grpc_channel* channel) {
          (which is common) - which tends to help most allocators reuse memory
       2. a small amount of allowed growth over the estimate without hitting
          the arena size doubling case, reducing overall memory usage */
-  return ((size_t)gpr_atm_no_barrier_load(&channel->call_size_estimate) +
+  return (static_cast<size_t>(
+              gpr_atm_no_barrier_load(&channel->call_size_estimate)) +
           2 * ROUND_UP_SIZE) &
-         ~(size_t)(ROUND_UP_SIZE - 1);
+         ~static_cast<size_t>(ROUND_UP_SIZE - 1);
 }
 
 void grpc_channel_update_call_size_estimate(grpc_channel* channel,
                                             size_t size) {
-  size_t cur = (size_t)gpr_atm_no_barrier_load(&channel->call_size_estimate);
+  size_t cur = static_cast<size_t>(
+      gpr_atm_no_barrier_load(&channel->call_size_estimate));
   if (cur < size) {
     /* size grew: update estimate */
-    gpr_atm_no_barrier_cas(&channel->call_size_estimate, (gpr_atm)cur,
-                           (gpr_atm)size);
+    gpr_atm_no_barrier_cas(&channel->call_size_estimate,
+                           static_cast<gpr_atm>(cur),
+                           static_cast<gpr_atm>(size));
     /* if we lose: never mind, something else will likely update soon enough */
   } else if (cur == size) {
     /* no change: holding pattern */
   } else if (cur > 0) {
     /* size shrank: decrease estimate */
     gpr_atm_no_barrier_cas(
-        &channel->call_size_estimate, (gpr_atm)cur,
-        (gpr_atm)(GPR_MIN(cur - 1, (255 * cur + size) / 256)));
+        &channel->call_size_estimate, static_cast<gpr_atm>(cur),
+        static_cast<gpr_atm>(GPR_MIN(cur - 1, (255 * cur + size) / 256)));
     /* if we lose: never mind, something else will likely update soon enough */
   }
 }
@@ -297,7 +300,8 @@ grpc_call* grpc_channel_create_pollset_set_call(
 
 void* grpc_channel_register_call(grpc_channel* channel, const char* method,
                                  const char* host, void* reserved) {
-  registered_call* rc = (registered_call*)gpr_malloc(sizeof(registered_call));
+  registered_call* rc =
+      static_cast<registered_call*>(gpr_malloc(sizeof(registered_call)));
   GRPC_API_TRACE(
       "grpc_channel_register_call(channel=%p, method=%s, host=%s, reserved=%p)",
       4, (channel, method, host, reserved));
@@ -324,7 +328,7 @@ grpc_call* grpc_channel_create_registered_call(
     grpc_channel* channel, grpc_call* parent_call, uint32_t propagation_mask,
     grpc_completion_queue* completion_queue, void* registered_call_handle,
     gpr_timespec deadline, void* reserved) {
-  registered_call* rc = (registered_call*)registered_call_handle;
+  registered_call* rc = static_cast<registered_call*>(registered_call_handle);
   GRPC_API_TRACE(
       "grpc_channel_create_registered_call("
       "channel=%p, parent_call=%p, propagation_mask=%x, completion_queue=%p, "
@@ -362,7 +366,7 @@ void grpc_channel_internal_unref(grpc_channel* c REF_ARG) {
 }
 
 static void destroy_channel(void* arg, grpc_error* error) {
-  grpc_channel* channel = (grpc_channel*)arg;
+  grpc_channel* channel = static_cast<grpc_channel*>(arg);
   grpc_channel_stack_destroy(CHANNEL_STACK_FROM_CHANNEL(channel));
   while (channel->registered_calls) {
     registered_call* rc = channel->registered_calls;
diff --git a/src/core/lib/surface/channel_init.cc b/src/core/lib/surface/channel_init.cc
index 99690e63b4..b1e1dceed3 100644
--- a/src/core/lib/surface/channel_init.cc
+++ b/src/core/lib/surface/channel_init.cc
@@ -52,9 +52,9 @@ void grpc_channel_init_register_stage(grpc_channel_stack_type type,
   GPR_ASSERT(!g_finalized);
   if (g_slots[type].cap_slots == g_slots[type].num_slots) {
     g_slots[type].cap_slots = GPR_MAX(8, 3 * g_slots[type].cap_slots / 2);
-    g_slots[type].slots = (stage_slot*)gpr_realloc(
-        g_slots[type].slots,
-        g_slots[type].cap_slots * sizeof(*g_slots[type].slots));
+    g_slots[type].slots = static_cast<stage_slot*>(
+        gpr_realloc(g_slots[type].slots,
+                    g_slots[type].cap_slots * sizeof(*g_slots[type].slots)));
   }
   stage_slot* s = &g_slots[type].slots[g_slots[type].num_slots++];
   s->insertion_order = g_slots[type].num_slots;
@@ -64,8 +64,8 @@ void grpc_channel_init_register_stage(grpc_channel_stack_type type,
 }
 
 static int compare_slots(const void* a, const void* b) {
-  const stage_slot* sa = (const stage_slot*)a;
-  const stage_slot* sb = (const stage_slot*)b;
+  const stage_slot* sa = static_cast<const stage_slot*>(a);
+  const stage_slot* sb = static_cast<const stage_slot*>(b);
 
   int c = GPR_ICMP(sa->priority, sb->priority);
   if (c != 0) return c;
@@ -84,7 +84,8 @@ void grpc_channel_init_finalize(void) {
 void grpc_channel_init_shutdown(void) {
   for (int i = 0; i < GRPC_NUM_CHANNEL_STACK_TYPES; i++) {
     gpr_free(g_slots[i].slots);
-    g_slots[i].slots = (stage_slot*)(void*)(uintptr_t)0xdeadbeef;
+    g_slots[i].slots =
+        static_cast<stage_slot*>((void*)static_cast<uintptr_t>(0xdeadbeef));
   }
 }
 
diff --git a/src/core/lib/surface/channel_ping.cc b/src/core/lib/surface/channel_ping.cc
index a030d8d0f0..513519d991 100644
--- a/src/core/lib/surface/channel_ping.cc
+++ b/src/core/lib/surface/channel_ping.cc
@@ -38,7 +38,7 @@ static void ping_destroy(void* arg, grpc_cq_completion* storage) {
 }
 
 static void ping_done(void* arg, grpc_error* error) {
-  ping_result* pr = (ping_result*)arg;
+  ping_result* pr = static_cast<ping_result*>(arg);
   grpc_cq_end_op(pr->cq, pr->tag, GRPC_ERROR_REF(error), ping_destroy, pr,
                  &pr->completion_storage);
 }
@@ -48,7 +48,7 @@ void grpc_channel_ping(grpc_channel* channel, grpc_completion_queue* cq,
   GRPC_API_TRACE("grpc_channel_ping(channel=%p, cq=%p, tag=%p, reserved=%p)", 4,
                  (channel, cq, tag, reserved));
   grpc_transport_op* op = grpc_make_transport_op(nullptr);
-  ping_result* pr = (ping_result*)gpr_malloc(sizeof(*pr));
+  ping_result* pr = static_cast<ping_result*>(gpr_malloc(sizeof(*pr)));
   grpc_channel_element* top_elem =
       grpc_channel_stack_element(grpc_channel_get_channel_stack(channel), 0);
   grpc_core::ExecCtx exec_ctx;
diff --git a/src/core/lib/surface/completion_queue.cc b/src/core/lib/surface/completion_queue.cc
index a2c52082c2..d0363917b0 100644
--- a/src/core/lib/surface/completion_queue.cc
+++ b/src/core/lib/surface/completion_queue.cc
@@ -88,24 +88,24 @@ static size_t non_polling_poller_size(void) {
 }
 
 static void non_polling_poller_init(grpc_pollset* pollset, gpr_mu** mu) {
-  non_polling_poller* npp = (non_polling_poller*)pollset;
+  non_polling_poller* npp = reinterpret_cast<non_polling_poller*>(pollset);
   gpr_mu_init(&npp->mu);
   *mu = &npp->mu;
 }
 
 static void non_polling_poller_destroy(grpc_pollset* pollset) {
-  non_polling_poller* npp = (non_polling_poller*)pollset;
+  non_polling_poller* npp = reinterpret_cast<non_polling_poller*>(pollset);
   gpr_mu_destroy(&npp->mu);
 }
 
 static grpc_error* non_polling_poller_work(grpc_pollset* pollset,
                                            grpc_pollset_worker** worker,
                                            grpc_millis deadline) {
-  non_polling_poller* npp = (non_polling_poller*)pollset;
+  non_polling_poller* npp = reinterpret_cast<non_polling_poller*>(pollset);
   if (npp->shutdown) return GRPC_ERROR_NONE;
   non_polling_worker w;
   gpr_cv_init(&w.cv);
-  if (worker != nullptr) *worker = (grpc_pollset_worker*)&w;
+  if (worker != nullptr) *worker = reinterpret_cast<grpc_pollset_worker*>(&w);
   if (npp->root == nullptr) {
     npp->root = w.next = w.prev = &w;
   } else {
@@ -138,11 +138,12 @@ static grpc_error* non_polling_poller_work(grpc_pollset* pollset,
 
 static grpc_error* non_polling_poller_kick(
     grpc_pollset* pollset, grpc_pollset_worker* specific_worker) {
-  non_polling_poller* p = (non_polling_poller*)pollset;
+  non_polling_poller* p = reinterpret_cast<non_polling_poller*>(pollset);
   if (specific_worker == nullptr)
-    specific_worker = (grpc_pollset_worker*)p->root;
+    specific_worker = reinterpret_cast<grpc_pollset_worker*>(p->root);
   if (specific_worker != nullptr) {
-    non_polling_worker* w = (non_polling_worker*)specific_worker;
+    non_polling_worker* w =
+        reinterpret_cast<non_polling_worker*>(specific_worker);
     if (!w->kicked) {
       w->kicked = true;
       gpr_cv_signal(&w->cv);
@@ -153,7 +154,7 @@ static grpc_error* non_polling_poller_kick(
 
 static void non_polling_poller_shutdown(grpc_pollset* pollset,
                                         grpc_closure* closure) {
-  non_polling_poller* p = (non_polling_poller*)pollset;
+  non_polling_poller* p = reinterpret_cast<non_polling_poller*>(pollset);
   GPR_ASSERT(closure != nullptr);
   p->shutdown = closure;
   if (p->root == nullptr) {
@@ -354,10 +355,10 @@ int grpc_completion_queue_thread_local_cache_flush(grpc_completion_queue* cq,
       (grpc_completion_queue*)gpr_tls_get(&g_cached_cq) == cq) {
     *tag = storage->tag;
     grpc_core::ExecCtx exec_ctx;
-    *ok = (storage->next & (uintptr_t)(1)) == 1;
+    *ok = (storage->next & static_cast<uintptr_t>(1)) == 1;
     storage->done(storage->done_arg, storage);
     ret = 1;
-    cq_next_data* cqd = (cq_next_data*)DATA_FROM_CQ(cq);
+    cq_next_data* cqd = static_cast<cq_next_data*> DATA_FROM_CQ(cq);
     if (gpr_atm_full_fetch_add(&cqd->pending_events, -1) == 1) {
       GRPC_CQ_INTERNAL_REF(cq, "shutting_down");
       gpr_mu_lock(cq->mu);
@@ -383,7 +384,7 @@ static void cq_event_queue_destroy(grpc_cq_event_queue* q) {
 }
 
 static bool cq_event_queue_push(grpc_cq_event_queue* q, grpc_cq_completion* c) {
-  gpr_mpscq_push(&q->queue, (gpr_mpscq_node*)c);
+  gpr_mpscq_push(&q->queue, reinterpret_cast<gpr_mpscq_node*>(c));
   return gpr_atm_no_barrier_fetch_add(&q->num_queue_items, 1) == 0;
 }
 
@@ -395,7 +396,8 @@ static grpc_cq_completion* cq_event_queue_pop(grpc_cq_event_queue* q) {
     GRPC_STATS_INC_CQ_EV_QUEUE_TRYLOCK_SUCCESSES();
 
     bool is_empty = false;
-    c = (grpc_cq_completion*)gpr_mpscq_pop_and_check_end(&q->queue, &is_empty);
+    c = reinterpret_cast<grpc_cq_completion*>(
+        gpr_mpscq_pop_and_check_end(&q->queue, &is_empty));
     gpr_spinlock_unlock(&q->queue_lock);
 
     if (c == nullptr && !is_empty) {
@@ -415,7 +417,7 @@ static grpc_cq_completion* cq_event_queue_pop(grpc_cq_event_queue* q) {
 /* Note: The counter is not incremented/decremented atomically with push/pop.
  * The count is only eventually consistent */
 static long cq_event_queue_num_items(grpc_cq_event_queue* q) {
-  return (long)gpr_atm_no_barrier_load(&q->num_queue_items);
+  return static_cast<long>(gpr_atm_no_barrier_load(&q->num_queue_items));
 }
 
 grpc_completion_queue* grpc_completion_queue_create_internal(
@@ -437,9 +439,9 @@ grpc_completion_queue* grpc_completion_queue_create_internal(
   grpc_core::ExecCtx exec_ctx;
   GRPC_STATS_INC_CQS_CREATED();
 
-  cq = (grpc_completion_queue*)gpr_zalloc(sizeof(grpc_completion_queue) +
-                                          vtable->data_size +
-                                          poller_vtable->size());
+  cq = static_cast<grpc_completion_queue*>(
+      gpr_zalloc(sizeof(grpc_completion_queue) + vtable->data_size +
+                 poller_vtable->size()));
 
   cq->vtable = vtable;
   cq->poller_vtable = poller_vtable;
@@ -456,7 +458,7 @@ grpc_completion_queue* grpc_completion_queue_create_internal(
 }
 
 static void cq_init_next(void* ptr) {
-  cq_next_data* cqd = (cq_next_data*)ptr;
+  cq_next_data* cqd = static_cast<cq_next_data*>(ptr);
   /* Initial count is dropped by grpc_completion_queue_shutdown */
   gpr_atm_no_barrier_store(&cqd->pending_events, 1);
   cqd->shutdown_called = false;
@@ -465,13 +467,13 @@ static void cq_init_next(void* ptr) {
 }
 
 static void cq_destroy_next(void* ptr) {
-  cq_next_data* cqd = (cq_next_data*)ptr;
+  cq_next_data* cqd = static_cast<cq_next_data*>(ptr);
   GPR_ASSERT(cq_event_queue_num_items(&cqd->queue) == 0);
   cq_event_queue_destroy(&cqd->queue);
 }
 
 static void cq_init_pluck(void* ptr) {
-  cq_pluck_data* cqd = (cq_pluck_data*)ptr;
+  cq_pluck_data* cqd = static_cast<cq_pluck_data*>(ptr);
   /* Initial count is dropped by grpc_completion_queue_shutdown */
   gpr_atm_no_barrier_store(&cqd->pending_events, 1);
   cqd->completed_tail = &cqd->completed_head;
@@ -483,7 +485,7 @@ static void cq_init_pluck(void* ptr) {
 }
 
 static void cq_destroy_pluck(void* ptr) {
-  cq_pluck_data* cqd = (cq_pluck_data*)ptr;
+  cq_pluck_data* cqd = static_cast<cq_pluck_data*>(ptr);
   GPR_ASSERT(cqd->completed_head.next == (uintptr_t)&cqd->completed_head);
 }
 
@@ -515,7 +517,7 @@ void grpc_cq_internal_ref(grpc_completion_queue* cq) {
 }
 
 static void on_pollset_shutdown_done(void* arg, grpc_error* error) {
-  grpc_completion_queue* cq = (grpc_completion_queue*)arg;
+  grpc_completion_queue* cq = static_cast<grpc_completion_queue*>(arg);
   GRPC_CQ_INTERNAL_UNREF(cq, "pollset_destroy");
 }
 
@@ -548,7 +550,7 @@ static void cq_check_tag(grpc_completion_queue* cq, void* tag, bool lock_cq) {
     gpr_mu_lock(cq->mu);
   }
 
-  for (int i = 0; i < (int)cq->outstanding_tag_count; i++) {
+  for (int i = 0; i < static_cast<int>(cq->outstanding_tag_count); i++) {
     if (cq->outstanding_tags[i] == tag) {
       cq->outstanding_tag_count--;
       GPR_SWAP(void*, cq->outstanding_tags[i],
@@ -587,12 +589,12 @@ static bool atm_inc_if_nonzero(gpr_atm* counter) {
 }
 
 static bool cq_begin_op_for_next(grpc_completion_queue* cq, void* tag) {
-  cq_next_data* cqd = (cq_next_data*)DATA_FROM_CQ(cq);
+  cq_next_data* cqd = static_cast<cq_next_data*> DATA_FROM_CQ(cq);
   return atm_inc_if_nonzero(&cqd->pending_events);
 }
 
 static bool cq_begin_op_for_pluck(grpc_completion_queue* cq, void* tag) {
-  cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
+  cq_pluck_data* cqd = static_cast<cq_pluck_data*> DATA_FROM_CQ(cq);
   return atm_inc_if_nonzero(&cqd->pending_events);
 }
 
@@ -601,9 +603,9 @@ bool grpc_cq_begin_op(grpc_completion_queue* cq, void* tag) {
   gpr_mu_lock(cq->mu);
   if (cq->outstanding_tag_count == cq->outstanding_tag_capacity) {
     cq->outstanding_tag_capacity = GPR_MAX(4, 2 * cq->outstanding_tag_capacity);
-    cq->outstanding_tags = (void**)gpr_realloc(
+    cq->outstanding_tags = static_cast<void**>(gpr_realloc(
         cq->outstanding_tags,
-        sizeof(*cq->outstanding_tags) * cq->outstanding_tag_capacity);
+        sizeof(*cq->outstanding_tags) * cq->outstanding_tag_capacity));
   }
   cq->outstanding_tags[cq->outstanding_tag_count++] = tag;
   gpr_mu_unlock(cq->mu);
@@ -632,13 +634,13 @@ static void cq_end_op_for_next(grpc_completion_queue* cq, void* tag,
       gpr_log(GPR_ERROR, "Operation failed: tag=%p, error=%s", tag, errmsg);
     }
   }
-  cq_next_data* cqd = (cq_next_data*)DATA_FROM_CQ(cq);
+  cq_next_data* cqd = static_cast<cq_next_data*> DATA_FROM_CQ(cq);
   int is_success = (error == GRPC_ERROR_NONE);
 
   storage->tag = tag;
   storage->done = done;
   storage->done_arg = done_arg;
-  storage->next = (uintptr_t)(is_success);
+  storage->next = static_cast<uintptr_t>(is_success);
 
   cq_check_tag(cq, tag, true); /* Used in debug builds only */
 
@@ -701,7 +703,7 @@ static void cq_end_op_for_pluck(grpc_completion_queue* cq, void* tag,
                                 void* done_arg, grpc_cq_completion* storage) {
   GPR_TIMER_SCOPE("cq_end_op_for_pluck", 0);
 
-  cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
+  cq_pluck_data* cqd = static_cast<cq_pluck_data*> DATA_FROM_CQ(cq);
   int is_success = (error == GRPC_ERROR_NONE);
 
   if (grpc_api_trace.enabled() ||
@@ -719,7 +721,8 @@ static void cq_end_op_for_pluck(grpc_completion_queue* cq, void* tag,
   storage->tag = tag;
   storage->done = done;
   storage->done_arg = done_arg;
-  storage->next = ((uintptr_t)&cqd->completed_head) | ((uintptr_t)(is_success));
+  storage->next =
+      ((uintptr_t)&cqd->completed_head) | (static_cast<uintptr_t>(is_success));
 
   gpr_mu_lock(cq->mu);
   cq_check_tag(cq, tag, false); /* Used in debug builds only */
@@ -727,7 +730,7 @@ static void cq_end_op_for_pluck(grpc_completion_queue* cq, void* tag,
   /* Add to the list of completions */
   gpr_atm_no_barrier_fetch_add(&cqd->things_queued_ever, 1);
   cqd->completed_tail->next =
-      ((uintptr_t)storage) | (1u & (uintptr_t)cqd->completed_tail->next);
+      ((uintptr_t)storage) | (1u & cqd->completed_tail->next);
   cqd->completed_tail = storage;
 
   if (gpr_atm_full_fetch_add(&cqd->pending_events, -1) == 1) {
@@ -778,9 +781,10 @@ class ExecCtxNext : public grpc_core::ExecCtx {
   ExecCtxNext(void* arg) : ExecCtx(0), check_ready_to_finish_arg_(arg) {}
 
   bool CheckReadyToFinish() override {
-    cq_is_finished_arg* a = (cq_is_finished_arg*)check_ready_to_finish_arg_;
+    cq_is_finished_arg* a =
+        static_cast<cq_is_finished_arg*>(check_ready_to_finish_arg_);
     grpc_completion_queue* cq = a->cq;
-    cq_next_data* cqd = (cq_next_data*)DATA_FROM_CQ(cq);
+    cq_next_data* cqd = static_cast<cq_next_data*> DATA_FROM_CQ(cq);
     GPR_ASSERT(a->stolen_completion == nullptr);
 
     gpr_atm current_last_seen_things_queued_ever =
@@ -836,7 +840,7 @@ static grpc_event cq_next(grpc_completion_queue* cq, gpr_timespec deadline,
   GPR_TIMER_SCOPE("grpc_completion_queue_next", 0);
 
   grpc_event ret;
-  cq_next_data* cqd = (cq_next_data*)DATA_FROM_CQ(cq);
+  cq_next_data* cqd = static_cast<cq_next_data*> DATA_FROM_CQ(cq);
 
   GRPC_API_TRACE(
       "grpc_completion_queue_next("
@@ -961,7 +965,7 @@ static grpc_event cq_next(grpc_completion_queue* cq, gpr_timespec deadline,
    - grpc_completion_queue_shutdown() MUST have been called before calling
    this function */
 static void cq_finish_shutdown_next(grpc_completion_queue* cq) {
-  cq_next_data* cqd = (cq_next_data*)DATA_FROM_CQ(cq);
+  cq_next_data* cqd = static_cast<cq_next_data*> DATA_FROM_CQ(cq);
 
   GPR_ASSERT(cqd->shutdown_called);
   GPR_ASSERT(gpr_atm_no_barrier_load(&cqd->pending_events) == 0);
@@ -970,7 +974,7 @@ static void cq_finish_shutdown_next(grpc_completion_queue* cq) {
 }
 
 static void cq_shutdown_next(grpc_completion_queue* cq) {
-  cq_next_data* cqd = (cq_next_data*)DATA_FROM_CQ(cq);
+  cq_next_data* cqd = static_cast<cq_next_data*> DATA_FROM_CQ(cq);
 
   /* Need an extra ref for cq here because:
    * We call cq_finish_shutdown_next() below, that would call pollset shutdown.
@@ -1003,7 +1007,7 @@ grpc_event grpc_completion_queue_next(grpc_completion_queue* cq,
 
 static int add_plucker(grpc_completion_queue* cq, void* tag,
                        grpc_pollset_worker** worker) {
-  cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
+  cq_pluck_data* cqd = static_cast<cq_pluck_data*> DATA_FROM_CQ(cq);
   if (cqd->num_pluckers == GRPC_MAX_COMPLETION_QUEUE_PLUCKERS) {
     return 0;
   }
@@ -1015,7 +1019,7 @@ static int add_plucker(grpc_completion_queue* cq, void* tag,
 
 static void del_plucker(grpc_completion_queue* cq, void* tag,
                         grpc_pollset_worker** worker) {
-  cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
+  cq_pluck_data* cqd = static_cast<cq_pluck_data*> DATA_FROM_CQ(cq);
   for (int i = 0; i < cqd->num_pluckers; i++) {
     if (cqd->pluckers[i].tag == tag && cqd->pluckers[i].worker == worker) {
       cqd->num_pluckers--;
@@ -1031,9 +1035,10 @@ class ExecCtxPluck : public grpc_core::ExecCtx {
   ExecCtxPluck(void* arg) : ExecCtx(0), check_ready_to_finish_arg_(arg) {}
 
   bool CheckReadyToFinish() override {
-    cq_is_finished_arg* a = (cq_is_finished_arg*)check_ready_to_finish_arg_;
+    cq_is_finished_arg* a =
+        static_cast<cq_is_finished_arg*>(check_ready_to_finish_arg_);
     grpc_completion_queue* cq = a->cq;
-    cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
+    cq_pluck_data* cqd = static_cast<cq_pluck_data*> DATA_FROM_CQ(cq);
 
     GPR_ASSERT(a->stolen_completion == nullptr);
     gpr_atm current_last_seen_things_queued_ever =
@@ -1045,10 +1050,12 @@ class ExecCtxPluck : public grpc_core::ExecCtx {
           gpr_atm_no_barrier_load(&cqd->things_queued_ever);
       grpc_cq_completion* c;
       grpc_cq_completion* prev = &cqd->completed_head;
-      while ((c = (grpc_cq_completion*)(prev->next & ~(uintptr_t)1)) !=
+      while ((c = (grpc_cq_completion*)(prev->next &
+                                        ~static_cast<uintptr_t>(1))) !=
              &cqd->completed_head) {
         if (c->tag == a->tag) {
-          prev->next = (prev->next & (uintptr_t)1) | (c->next & ~(uintptr_t)1);
+          prev->next = (prev->next & static_cast<uintptr_t>(1)) |
+                       (c->next & ~static_cast<uintptr_t>(1));
           if (c == cqd->completed_tail) {
             cqd->completed_tail = prev;
           }
@@ -1075,7 +1082,7 @@ static grpc_event cq_pluck(grpc_completion_queue* cq, void* tag,
   grpc_cq_completion* c;
   grpc_cq_completion* prev;
   grpc_pollset_worker* worker = nullptr;
-  cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
+  cq_pluck_data* cqd = static_cast<cq_pluck_data*> DATA_FROM_CQ(cq);
 
   if (grpc_cq_pluck_trace.enabled()) {
     GRPC_API_TRACE(
@@ -1115,10 +1122,12 @@ static grpc_event cq_pluck(grpc_completion_queue* cq, void* tag,
       break;
     }
     prev = &cqd->completed_head;
-    while ((c = (grpc_cq_completion*)(prev->next & ~(uintptr_t)1)) !=
-           &cqd->completed_head) {
+    while (
+        (c = (grpc_cq_completion*)(prev->next & ~static_cast<uintptr_t>(1))) !=
+        &cqd->completed_head) {
       if (c->tag == tag) {
-        prev->next = (prev->next & (uintptr_t)1) | (c->next & ~(uintptr_t)1);
+        prev->next = (prev->next & static_cast<uintptr_t>(1)) |
+                     (c->next & ~static_cast<uintptr_t>(1));
         if (c == cqd->completed_tail) {
           cqd->completed_tail = prev;
         }
@@ -1191,7 +1200,7 @@ grpc_event grpc_completion_queue_pluck(grpc_completion_queue* cq, void* tag,
 }
 
 static void cq_finish_shutdown_pluck(grpc_completion_queue* cq) {
-  cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
+  cq_pluck_data* cqd = static_cast<cq_pluck_data*> DATA_FROM_CQ(cq);
 
   GPR_ASSERT(cqd->shutdown_called);
   GPR_ASSERT(!gpr_atm_no_barrier_load(&cqd->shutdown));
@@ -1203,7 +1212,7 @@ static void cq_finish_shutdown_pluck(grpc_completion_queue* cq) {
 /* NOTE: This function is almost exactly identical to cq_shutdown_next() but
  * merging them is a bit tricky and probably not worth it */
 static void cq_shutdown_pluck(grpc_completion_queue* cq) {
-  cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
+  cq_pluck_data* cqd = static_cast<cq_pluck_data*> DATA_FROM_CQ(cq);
 
   /* Need an extra ref for cq here because:
    * We call cq_finish_shutdown_pluck() below, that would call pollset shutdown.
diff --git a/src/core/lib/surface/init.cc b/src/core/lib/surface/init.cc
index 7f7947faaa..46bf266740 100644
--- a/src/core/lib/surface/init.cc
+++ b/src/core/lib/surface/init.cc
@@ -74,12 +74,12 @@ static void do_basic_init(void) {
 
 static bool append_filter(grpc_channel_stack_builder* builder, void* arg) {
   return grpc_channel_stack_builder_append_filter(
-      builder, (const grpc_channel_filter*)arg, nullptr, nullptr);
+      builder, static_cast<const grpc_channel_filter*>(arg), nullptr, nullptr);
 }
 
 static bool prepend_filter(grpc_channel_stack_builder* builder, void* arg) {
   return grpc_channel_stack_builder_prepend_filter(
-      builder, (const grpc_channel_filter*)arg, nullptr, nullptr);
+      builder, static_cast<const grpc_channel_filter*>(arg), nullptr, nullptr);
 }
 
 static void register_builtin_channel_init() {
diff --git a/src/core/lib/surface/server.cc b/src/core/lib/surface/server.cc
index 1e59434aa5..d71a23a5d7 100644
--- a/src/core/lib/surface/server.cc
+++ b/src/core/lib/surface/server.cc
@@ -241,8 +241,8 @@ static void channel_broadcaster_init(grpc_server* s, channel_broadcaster* cb) {
     count++;
   }
   cb->num_channels = count;
-  cb->channels =
-      (grpc_channel**)gpr_malloc(sizeof(*cb->channels) * cb->num_channels);
+  cb->channels = static_cast<grpc_channel**>(
+      gpr_malloc(sizeof(*cb->channels) * cb->num_channels));
   count = 0;
   for (c = s->root_channel_data.next; c != &s->root_channel_data; c = c->next) {
     cb->channels[count++] = c->channel;
@@ -256,7 +256,8 @@ struct shutdown_cleanup_args {
 };
 
 static void shutdown_cleanup(void* arg, grpc_error* error) {
-  struct shutdown_cleanup_args* a = (struct shutdown_cleanup_args*)arg;
+  struct shutdown_cleanup_args* a =
+      static_cast<struct shutdown_cleanup_args*>(arg);
   grpc_slice_unref_internal(a->slice);
   gpr_free(a);
 }
@@ -264,7 +265,7 @@ static void shutdown_cleanup(void* arg, grpc_error* error) {
 static void send_shutdown(grpc_channel* channel, bool send_goaway,
                           grpc_error* send_disconnect) {
   struct shutdown_cleanup_args* sc =
-      (struct shutdown_cleanup_args*)gpr_malloc(sizeof(*sc));
+      static_cast<struct shutdown_cleanup_args*>(gpr_malloc(sizeof(*sc)));
   GRPC_CLOSURE_INIT(&sc->closure, shutdown_cleanup, sc,
                     grpc_schedule_on_exec_ctx);
   grpc_transport_op* op = grpc_make_transport_op(&sc->closure);
@@ -304,8 +305,8 @@ static void channel_broadcaster_shutdown(channel_broadcaster* cb,
 static void request_matcher_init(request_matcher* rm, grpc_server* server) {
   memset(rm, 0, sizeof(*rm));
   rm->server = server;
-  rm->requests_per_cq = (gpr_locked_mpscq*)gpr_malloc(
-      sizeof(*rm->requests_per_cq) * server->cq_count);
+  rm->requests_per_cq = static_cast<gpr_locked_mpscq*>(
+      gpr_malloc(sizeof(*rm->requests_per_cq) * server->cq_count));
   for (size_t i = 0; i < server->cq_count; i++) {
     gpr_locked_mpscq_init(&rm->requests_per_cq[i]);
   }
@@ -320,7 +321,8 @@ static void request_matcher_destroy(request_matcher* rm) {
 }
 
 static void kill_zombie(void* elem, grpc_error* error) {
-  grpc_call_unref(grpc_call_from_top_element((grpc_call_element*)elem));
+  grpc_call_unref(
+      grpc_call_from_top_element(static_cast<grpc_call_element*>(elem)));
 }
 
 static void request_matcher_zombify_all_pending_calls(request_matcher* rm) {
@@ -341,8 +343,8 @@ static void request_matcher_kill_requests(grpc_server* server,
                                           grpc_error* error) {
   requested_call* rc;
   for (size_t i = 0; i < server->cq_count; i++) {
-    while ((rc = (requested_call*)gpr_locked_mpscq_pop(
-                &rm->requests_per_cq[i])) != nullptr) {
+    while ((rc = reinterpret_cast<requested_call*>(
+                gpr_locked_mpscq_pop(&rm->requests_per_cq[i]))) != nullptr) {
       fail_call(server, i, rc, GRPC_ERROR_REF(error));
     }
   }
@@ -402,7 +404,7 @@ static void orphan_channel(channel_data* chand) {
 }
 
 static void finish_destroy_channel(void* cd, grpc_error* error) {
-  channel_data* chand = (channel_data*)cd;
+  channel_data* chand = static_cast<channel_data*>(cd);
   grpc_server* server = chand->server;
   GRPC_CHANNEL_INTERNAL_UNREF(chand->channel, "server");
   server_unref(server);
@@ -469,9 +471,9 @@ static void publish_call(grpc_server* server, call_data* calld, size_t cq_idx,
 }
 
 static void publish_new_rpc(void* arg, grpc_error* error) {
-  grpc_call_element* call_elem = (grpc_call_element*)arg;
-  call_data* calld = (call_data*)call_elem->call_data;
-  channel_data* chand = (channel_data*)call_elem->channel_data;
+  grpc_call_element* call_elem = static_cast<grpc_call_element*>(arg);
+  call_data* calld = static_cast<call_data*>(call_elem->call_data);
+  channel_data* chand = static_cast<channel_data*>(call_elem->channel_data);
   request_matcher* rm = calld->matcher;
   grpc_server* server = rm->server;
 
@@ -487,8 +489,8 @@ static void publish_new_rpc(void* arg, grpc_error* error) {
 
   for (size_t i = 0; i < server->cq_count; i++) {
     size_t cq_idx = (chand->cq_idx + i) % server->cq_count;
-    requested_call* rc =
-        (requested_call*)gpr_locked_mpscq_try_pop(&rm->requests_per_cq[cq_idx]);
+    requested_call* rc = reinterpret_cast<requested_call*>(
+        gpr_locked_mpscq_try_pop(&rm->requests_per_cq[cq_idx]));
     if (rc == nullptr) {
       continue;
     } else {
@@ -509,8 +511,8 @@ static void publish_new_rpc(void* arg, grpc_error* error) {
   // added to the pending list.
   for (size_t i = 0; i < server->cq_count; i++) {
     size_t cq_idx = (chand->cq_idx + i) % server->cq_count;
-    requested_call* rc =
-        (requested_call*)gpr_locked_mpscq_pop(&rm->requests_per_cq[cq_idx]);
+    requested_call* rc = reinterpret_cast<requested_call*>(
+        gpr_locked_mpscq_pop(&rm->requests_per_cq[cq_idx]));
     if (rc == nullptr) {
       continue;
     } else {
@@ -536,7 +538,7 @@ static void publish_new_rpc(void* arg, grpc_error* error) {
 static void finish_start_new_rpc(
     grpc_server* server, grpc_call_element* elem, request_matcher* rm,
     grpc_server_register_method_payload_handling payload_handling) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
 
   if (gpr_atm_acq_load(&server->shutdown_flag)) {
     gpr_atm_no_barrier_store(&calld->state, ZOMBIED);
@@ -566,8 +568,8 @@ static void finish_start_new_rpc(
 }
 
 static void start_new_rpc(grpc_call_element* elem) {
-  channel_data* chand = (channel_data*)elem->channel_data;
-  call_data* calld = (call_data*)elem->call_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   grpc_server* server = chand->server;
   uint32_t i;
   uint32_t hash;
@@ -626,7 +628,7 @@ static int num_listeners(grpc_server* server) {
 }
 
 static void done_shutdown_event(void* server, grpc_cq_completion* completion) {
-  server_unref((grpc_server*)server);
+  server_unref(static_cast<grpc_server*>(server));
 }
 
 static int num_channels(grpc_server* server) {
@@ -689,8 +691,8 @@ static void maybe_finish_shutdown(grpc_server* server) {
 }
 
 static void server_on_recv_initial_metadata(void* ptr, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)ptr;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(ptr);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   grpc_millis op_deadline;
 
   if (error == GRPC_ERROR_NONE) {
@@ -728,7 +730,7 @@ static void server_on_recv_initial_metadata(void* ptr, grpc_error* error) {
 
 static void server_mutate_op(grpc_call_element* elem,
                              grpc_transport_stream_op_batch* op) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
 
   if (op->recv_initial_metadata) {
     GPR_ASSERT(op->payload->recv_initial_metadata.recv_flags == nullptr);
@@ -750,8 +752,8 @@ static void server_start_transport_stream_op_batch(
 }
 
 static void got_initial_metadata(void* ptr, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)ptr;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(ptr);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (error == GRPC_ERROR_NONE) {
     start_new_rpc(elem);
   } else {
@@ -768,7 +770,7 @@ static void got_initial_metadata(void* ptr, grpc_error* error) {
 
 static void accept_stream(void* cd, grpc_transport* transport,
                           const void* transport_server_data) {
-  channel_data* chand = (channel_data*)cd;
+  channel_data* chand = static_cast<channel_data*>(cd);
   /* create a call */
   grpc_call_create_args args;
   memset(&args, 0, sizeof(args));
@@ -784,7 +786,7 @@ static void accept_stream(void* cd, grpc_transport* transport,
     GRPC_ERROR_UNREF(error);
     return;
   }
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   grpc_op op;
   memset(&op, 0, sizeof(op));
   op.op = GRPC_OP_RECV_INITIAL_METADATA;
@@ -796,7 +798,7 @@ static void accept_stream(void* cd, grpc_transport* transport,
 }
 
 static void channel_connectivity_changed(void* cd, grpc_error* error) {
-  channel_data* chand = (channel_data*)cd;
+  channel_data* chand = static_cast<channel_data*>(cd);
   grpc_server* server = chand->server;
   if (chand->connectivity_state != GRPC_CHANNEL_SHUTDOWN) {
     grpc_transport_op* op = grpc_make_transport_op(nullptr);
@@ -815,8 +817,8 @@ static void channel_connectivity_changed(void* cd, grpc_error* error) {
 
 static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
-  call_data* calld = (call_data*)elem->call_data;
-  channel_data* chand = (channel_data*)elem->channel_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   memset(calld, 0, sizeof(call_data));
   calld->deadline = GRPC_MILLIS_INF_FUTURE;
   calld->call = grpc_call_from_top_element(elem);
@@ -832,8 +834,8 @@ static grpc_error* init_call_elem(grpc_call_element* elem,
 static void destroy_call_elem(grpc_call_element* elem,
                               const grpc_call_final_info* final_info,
                               grpc_closure* ignored) {
-  channel_data* chand = (channel_data*)elem->channel_data;
-  call_data* calld = (call_data*)elem->call_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
 
   GPR_ASSERT(calld->state != PENDING);
 
@@ -851,7 +853,7 @@ static void destroy_call_elem(grpc_call_element* elem,
 
 static grpc_error* init_channel_elem(grpc_channel_element* elem,
                                      grpc_channel_element_args* args) {
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   GPR_ASSERT(args->is_first);
   GPR_ASSERT(!args->is_last);
   chand->server = nullptr;
@@ -867,7 +869,7 @@ static grpc_error* init_channel_elem(grpc_channel_element* elem,
 
 static void destroy_channel_elem(grpc_channel_element* elem) {
   size_t i;
-  channel_data* chand = (channel_data*)elem->channel_data;
+  channel_data* chand = static_cast<channel_data*>(elem->channel_data);
   if (chand->registered_methods) {
     for (i = 0; i < chand->registered_method_slots; i++) {
       grpc_slice_unref_internal(chand->registered_methods[i].method);
@@ -913,8 +915,8 @@ static void register_completion_queue(grpc_server* server,
 
   GRPC_CQ_INTERNAL_REF(cq, "server");
   n = server->cq_count++;
-  server->cqs = (grpc_completion_queue**)gpr_realloc(
-      server->cqs, server->cq_count * sizeof(grpc_completion_queue*));
+  server->cqs = static_cast<grpc_completion_queue**>(gpr_realloc(
+      server->cqs, server->cq_count * sizeof(grpc_completion_queue*)));
   server->cqs[n] = cq;
 }
 
@@ -939,7 +941,8 @@ void grpc_server_register_completion_queue(grpc_server* server,
 grpc_server* grpc_server_create(const grpc_channel_args* args, void* reserved) {
   GRPC_API_TRACE("grpc_server_create(%p, %p)", 2, (args, reserved));
 
-  grpc_server* server = (grpc_server*)gpr_zalloc(sizeof(grpc_server));
+  grpc_server* server =
+      static_cast<grpc_server*>(gpr_zalloc(sizeof(grpc_server)));
 
   gpr_mu_init(&server->mu_global);
   gpr_mu_init(&server->mu_call);
@@ -988,7 +991,7 @@ void* grpc_server_register_method(
             flags);
     return nullptr;
   }
-  m = (registered_method*)gpr_zalloc(sizeof(registered_method));
+  m = static_cast<registered_method*>(gpr_zalloc(sizeof(registered_method)));
   m->method = gpr_strdup(method);
   m->host = gpr_strdup(host);
   m->next = server->registered_methods;
@@ -999,7 +1002,7 @@ void* grpc_server_register_method(
 }
 
 static void start_listeners(void* s, grpc_error* error) {
-  grpc_server* server = (grpc_server*)s;
+  grpc_server* server = static_cast<grpc_server*>(s);
   for (listener* l = server->listeners; l; l = l->next) {
     l->start(server, l->arg, server->pollsets, server->pollset_count);
   }
@@ -1020,8 +1023,8 @@ void grpc_server_start(grpc_server* server) {
 
   server->started = true;
   server->pollset_count = 0;
-  server->pollsets =
-      (grpc_pollset**)gpr_malloc(sizeof(grpc_pollset*) * server->cq_count);
+  server->pollsets = static_cast<grpc_pollset**>(
+      gpr_malloc(sizeof(grpc_pollset*) * server->cq_count));
   for (i = 0; i < server->cq_count; i++) {
     if (grpc_cq_can_listen(server->cqs[i])) {
       server->pollsets[server->pollset_count++] =
@@ -1063,9 +1066,9 @@ void grpc_server_setup_transport(grpc_server* s, grpc_transport* transport,
   grpc_transport_op* op = nullptr;
 
   channel = grpc_channel_create(nullptr, args, GRPC_SERVER_CHANNEL, transport);
-  chand = (channel_data*)grpc_channel_stack_element(
-              grpc_channel_get_channel_stack(channel), 0)
-              ->channel_data;
+  chand = static_cast<channel_data*>(
+      grpc_channel_stack_element(grpc_channel_get_channel_stack(channel), 0)
+          ->channel_data);
   chand->server = s;
   server_ref(s);
   chand->channel = channel;
@@ -1076,7 +1079,7 @@ void grpc_server_setup_transport(grpc_server* s, grpc_transport* transport,
   }
   if (cq_idx == s->cq_count) {
     /* completion queue not found: pick a random one to publish new calls to */
-    cq_idx = (size_t)rand() % s->cq_count;
+    cq_idx = static_cast<size_t>(rand()) % s->cq_count;
   }
   chand->cq_idx = cq_idx;
 
@@ -1089,7 +1092,8 @@ void grpc_server_setup_transport(grpc_server* s, grpc_transport* transport,
   if (num_registered_methods > 0) {
     slots = 2 * num_registered_methods;
     alloc = sizeof(channel_registered_method) * slots;
-    chand->registered_methods = (channel_registered_method*)gpr_zalloc(alloc);
+    chand->registered_methods =
+        static_cast<channel_registered_method*>(gpr_zalloc(alloc));
     for (rm = s->registered_methods; rm; rm = rm->next) {
       grpc_slice host;
       bool has_host;
@@ -1118,7 +1122,7 @@ void grpc_server_setup_transport(grpc_server* s, grpc_transport* transport,
       crm->method = method;
     }
     GPR_ASSERT(slots <= UINT32_MAX);
-    chand->registered_method_slots = (uint32_t)slots;
+    chand->registered_method_slots = static_cast<uint32_t>(slots);
     chand->registered_method_max_probes = max_probes;
   }
 
@@ -1148,7 +1152,7 @@ void done_published_shutdown(void* done_arg, grpc_cq_completion* storage) {
 }
 
 static void listener_destroy_done(void* s, grpc_error* error) {
-  grpc_server* server = (grpc_server*)s;
+  grpc_server* server = static_cast<grpc_server*>(s);
   gpr_mu_lock(&server->mu_global);
   server->listeners_destroyed++;
   maybe_finish_shutdown(server);
@@ -1176,13 +1180,14 @@ void grpc_server_shutdown_and_notify(grpc_server* server,
   GPR_ASSERT(grpc_cq_begin_op(cq, tag));
   if (server->shutdown_published) {
     grpc_cq_end_op(cq, tag, GRPC_ERROR_NONE, done_published_shutdown, nullptr,
-                   (grpc_cq_completion*)gpr_malloc(sizeof(grpc_cq_completion)));
+                   static_cast<grpc_cq_completion*>(
+                       gpr_malloc(sizeof(grpc_cq_completion))));
     gpr_mu_unlock(&server->mu_global);
     return;
   }
-  server->shutdown_tags = (shutdown_tag*)gpr_realloc(
-      server->shutdown_tags,
-      sizeof(shutdown_tag) * (server->num_shutdown_tags + 1));
+  server->shutdown_tags = static_cast<shutdown_tag*>(
+      gpr_realloc(server->shutdown_tags,
+                  sizeof(shutdown_tag) * (server->num_shutdown_tags + 1)));
   sdt = &server->shutdown_tags[server->num_shutdown_tags++];
   sdt->tag = tag;
   sdt->cq = cq;
@@ -1259,7 +1264,7 @@ void grpc_server_add_listener(grpc_server* server, void* arg,
                                             size_t pollset_count),
                               void (*destroy)(grpc_server* server, void* arg,
                                               grpc_closure* on_done)) {
-  listener* l = (listener*)gpr_malloc(sizeof(listener));
+  listener* l = static_cast<listener*>(gpr_malloc(sizeof(listener)));
   l->arg = arg;
   l->start = start;
   l->destroy = destroy;
@@ -1289,7 +1294,8 @@ static grpc_call_error queue_call_request(grpc_server* server, size_t cq_idx,
        matching calls */
     gpr_mu_lock(&server->mu_call);
     while ((calld = rm->pending_head) != nullptr) {
-      rc = (requested_call*)gpr_locked_mpscq_pop(&rm->requests_per_cq[cq_idx]);
+      rc = reinterpret_cast<requested_call*>(
+          gpr_locked_mpscq_pop(&rm->requests_per_cq[cq_idx]));
       if (rc == nullptr) break;
       rm->pending_head = calld->pending_next;
       gpr_mu_unlock(&server->mu_call);
@@ -1317,7 +1323,7 @@ grpc_call_error grpc_server_request_call(
     grpc_completion_queue* cq_for_notification, void* tag) {
   grpc_call_error error;
   grpc_core::ExecCtx exec_ctx;
-  requested_call* rc = (requested_call*)gpr_malloc(sizeof(*rc));
+  requested_call* rc = static_cast<requested_call*>(gpr_malloc(sizeof(*rc)));
   GRPC_STATS_INC_SERVER_REQUESTED_CALLS();
   GRPC_API_TRACE(
       "grpc_server_request_call("
@@ -1364,8 +1370,8 @@ grpc_call_error grpc_server_request_registered_call(
     grpc_completion_queue* cq_for_notification, void* tag) {
   grpc_call_error error;
   grpc_core::ExecCtx exec_ctx;
-  requested_call* rc = (requested_call*)gpr_malloc(sizeof(*rc));
-  registered_method* rm = (registered_method*)rmp;
+  requested_call* rc = static_cast<requested_call*>(gpr_malloc(sizeof(*rc)));
+  registered_method* rm = static_cast<registered_method*>(rmp);
   GRPC_STATS_INC_SERVER_REQUESTED_CALLS();
   GRPC_API_TRACE(
       "grpc_server_request_registered_call("
diff --git a/src/core/lib/transport/bdp_estimator.cc b/src/core/lib/transport/bdp_estimator.cc
index 2ba1cfdaa6..70b308230b 100644
--- a/src/core/lib/transport/bdp_estimator.cc
+++ b/src/core/lib/transport/bdp_estimator.cc
@@ -40,8 +40,9 @@ BdpEstimator::BdpEstimator(const char* name)
 grpc_millis BdpEstimator::CompletePing() {
   gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
   gpr_timespec dt_ts = gpr_time_sub(now, ping_start_time_);
-  double dt = (double)dt_ts.tv_sec + 1e-9 * (double)dt_ts.tv_nsec;
-  double bw = dt > 0 ? ((double)accumulator_ / dt) : 0;
+  double dt = static_cast<double>(dt_ts.tv_sec) +
+              1e-9 * static_cast<double>(dt_ts.tv_nsec);
+  double bw = dt > 0 ? (static_cast<double>(accumulator_) / dt) : 0;
   int start_inter_ping_delay = inter_ping_delay_;
   if (grpc_bdp_estimator_trace.enabled()) {
     gpr_log(GPR_DEBUG,
@@ -64,8 +65,8 @@ grpc_millis BdpEstimator::CompletePing() {
     stable_estimate_count_++;
     if (stable_estimate_count_ >= 2) {
       inter_ping_delay_ +=
-          100 +
-          (int)(rand() * 100.0 / RAND_MAX);  // if the ping estimate is steady,
+          100 + static_cast<int>(rand() * 100.0 /
+                                 RAND_MAX);  // if the ping estimate is steady,
                                              // slowly ramp down the probe time
     }
   }
diff --git a/src/core/lib/transport/byte_stream.cc b/src/core/lib/transport/byte_stream.cc
index 8dcb1e0bdb..afb55b2f20 100644
--- a/src/core/lib/transport/byte_stream.cc
+++ b/src/core/lib/transport/byte_stream.cc
@@ -49,14 +49,16 @@ void grpc_byte_stream_destroy(grpc_byte_stream* byte_stream) {
 static bool slice_buffer_stream_next(grpc_byte_stream* byte_stream,
                                      size_t max_size_hint,
                                      grpc_closure* on_complete) {
-  grpc_slice_buffer_stream* stream = (grpc_slice_buffer_stream*)byte_stream;
+  grpc_slice_buffer_stream* stream =
+      reinterpret_cast<grpc_slice_buffer_stream*>(byte_stream);
   GPR_ASSERT(stream->cursor < stream->backing_buffer->count);
   return true;
 }
 
 static grpc_error* slice_buffer_stream_pull(grpc_byte_stream* byte_stream,
                                             grpc_slice* slice) {
-  grpc_slice_buffer_stream* stream = (grpc_slice_buffer_stream*)byte_stream;
+  grpc_slice_buffer_stream* stream =
+      reinterpret_cast<grpc_slice_buffer_stream*>(byte_stream);
   if (stream->shutdown_error != GRPC_ERROR_NONE) {
     return GRPC_ERROR_REF(stream->shutdown_error);
   }
@@ -69,13 +71,15 @@ static grpc_error* slice_buffer_stream_pull(grpc_byte_stream* byte_stream,
 
 static void slice_buffer_stream_shutdown(grpc_byte_stream* byte_stream,
                                          grpc_error* error) {
-  grpc_slice_buffer_stream* stream = (grpc_slice_buffer_stream*)byte_stream;
+  grpc_slice_buffer_stream* stream =
+      reinterpret_cast<grpc_slice_buffer_stream*>(byte_stream);
   GRPC_ERROR_UNREF(stream->shutdown_error);
   stream->shutdown_error = error;
 }
 
 static void slice_buffer_stream_destroy(grpc_byte_stream* byte_stream) {
-  grpc_slice_buffer_stream* stream = (grpc_slice_buffer_stream*)byte_stream;
+  grpc_slice_buffer_stream* stream =
+      reinterpret_cast<grpc_slice_buffer_stream*>(byte_stream);
   grpc_slice_buffer_reset_and_unref_internal(stream->backing_buffer);
   GRPC_ERROR_UNREF(stream->shutdown_error);
 }
@@ -88,7 +92,7 @@ void grpc_slice_buffer_stream_init(grpc_slice_buffer_stream* stream,
                                    grpc_slice_buffer* slice_buffer,
                                    uint32_t flags) {
   GPR_ASSERT(slice_buffer->length <= UINT32_MAX);
-  stream->base.length = (uint32_t)slice_buffer->length;
+  stream->base.length = static_cast<uint32_t>(slice_buffer->length);
   stream->base.flags = flags;
   stream->base.vtable = &slice_buffer_stream_vtable;
   stream->backing_buffer = slice_buffer;
@@ -112,7 +116,8 @@ void grpc_byte_stream_cache_destroy(grpc_byte_stream_cache* cache) {
 static bool caching_byte_stream_next(grpc_byte_stream* byte_stream,
                                      size_t max_size_hint,
                                      grpc_closure* on_complete) {
-  grpc_caching_byte_stream* stream = (grpc_caching_byte_stream*)byte_stream;
+  grpc_caching_byte_stream* stream =
+      reinterpret_cast<grpc_caching_byte_stream*>(byte_stream);
   if (stream->shutdown_error != GRPC_ERROR_NONE) return true;
   if (stream->cursor < stream->cache->cache_buffer.count) return true;
   return grpc_byte_stream_next(stream->cache->underlying_stream, max_size_hint,
@@ -121,7 +126,8 @@ static bool caching_byte_stream_next(grpc_byte_stream* byte_stream,
 
 static grpc_error* caching_byte_stream_pull(grpc_byte_stream* byte_stream,
                                             grpc_slice* slice) {
-  grpc_caching_byte_stream* stream = (grpc_caching_byte_stream*)byte_stream;
+  grpc_caching_byte_stream* stream =
+      reinterpret_cast<grpc_caching_byte_stream*>(byte_stream);
   if (stream->shutdown_error != GRPC_ERROR_NONE) {
     return GRPC_ERROR_REF(stream->shutdown_error);
   }
@@ -143,14 +149,16 @@ static grpc_error* caching_byte_stream_pull(grpc_byte_stream* byte_stream,
 
 static void caching_byte_stream_shutdown(grpc_byte_stream* byte_stream,
                                          grpc_error* error) {
-  grpc_caching_byte_stream* stream = (grpc_caching_byte_stream*)byte_stream;
+  grpc_caching_byte_stream* stream =
+      reinterpret_cast<grpc_caching_byte_stream*>(byte_stream);
   GRPC_ERROR_UNREF(stream->shutdown_error);
   stream->shutdown_error = GRPC_ERROR_REF(error);
   grpc_byte_stream_shutdown(stream->cache->underlying_stream, error);
 }
 
 static void caching_byte_stream_destroy(grpc_byte_stream* byte_stream) {
-  grpc_caching_byte_stream* stream = (grpc_caching_byte_stream*)byte_stream;
+  grpc_caching_byte_stream* stream =
+      reinterpret_cast<grpc_caching_byte_stream*>(byte_stream);
   GRPC_ERROR_UNREF(stream->shutdown_error);
 }
 
diff --git a/src/core/lib/transport/connectivity_state.cc b/src/core/lib/transport/connectivity_state.cc
index c42cc9c8d0..17f3529a0e 100644
--- a/src/core/lib/transport/connectivity_state.cc
+++ b/src/core/lib/transport/connectivity_state.cc
@@ -73,9 +73,8 @@ void grpc_connectivity_state_destroy(grpc_connectivity_state_tracker* tracker) {
 
 grpc_connectivity_state grpc_connectivity_state_check(
     grpc_connectivity_state_tracker* tracker) {
-  grpc_connectivity_state cur =
-      (grpc_connectivity_state)gpr_atm_no_barrier_load(
-          &tracker->current_state_atm);
+  grpc_connectivity_state cur = static_cast<grpc_connectivity_state>(
+      gpr_atm_no_barrier_load(&tracker->current_state_atm));
   if (grpc_connectivity_state_trace.enabled()) {
     gpr_log(GPR_DEBUG, "CONWATCH: %p %s: get %s", tracker, tracker->name,
             grpc_connectivity_state_name(cur));
@@ -85,9 +84,8 @@ grpc_connectivity_state grpc_connectivity_state_check(
 
 grpc_connectivity_state grpc_connectivity_state_get(
     grpc_connectivity_state_tracker* tracker, grpc_error** error) {
-  grpc_connectivity_state cur =
-      (grpc_connectivity_state)gpr_atm_no_barrier_load(
-          &tracker->current_state_atm);
+  grpc_connectivity_state cur = static_cast<grpc_connectivity_state>(
+      gpr_atm_no_barrier_load(&tracker->current_state_atm));
   if (grpc_connectivity_state_trace.enabled()) {
     gpr_log(GPR_DEBUG, "CONWATCH: %p %s: get %s", tracker, tracker->name,
             grpc_connectivity_state_name(cur));
@@ -106,9 +104,8 @@ bool grpc_connectivity_state_has_watchers(
 bool grpc_connectivity_state_notify_on_state_change(
     grpc_connectivity_state_tracker* tracker, grpc_connectivity_state* current,
     grpc_closure* notify) {
-  grpc_connectivity_state cur =
-      (grpc_connectivity_state)gpr_atm_no_barrier_load(
-          &tracker->current_state_atm);
+  grpc_connectivity_state cur = static_cast<grpc_connectivity_state>(
+      gpr_atm_no_barrier_load(&tracker->current_state_atm));
   if (grpc_connectivity_state_trace.enabled()) {
     if (current == nullptr) {
       gpr_log(GPR_DEBUG, "CONWATCH: %p %s: unsubscribe notify=%p", tracker,
@@ -144,7 +141,7 @@ bool grpc_connectivity_state_notify_on_state_change(
       GRPC_CLOSURE_SCHED(notify, GRPC_ERROR_REF(tracker->current_error));
     } else {
       grpc_connectivity_state_watcher* w =
-          (grpc_connectivity_state_watcher*)gpr_malloc(sizeof(*w));
+          static_cast<grpc_connectivity_state_watcher*>(gpr_malloc(sizeof(*w)));
       w->current = current;
       w->notify = notify;
       w->next = tracker->watchers;
@@ -157,9 +154,8 @@ bool grpc_connectivity_state_notify_on_state_change(
 void grpc_connectivity_state_set(grpc_connectivity_state_tracker* tracker,
                                  grpc_connectivity_state state,
                                  grpc_error* error, const char* reason) {
-  grpc_connectivity_state cur =
-      (grpc_connectivity_state)gpr_atm_no_barrier_load(
-          &tracker->current_state_atm);
+  grpc_connectivity_state cur = static_cast<grpc_connectivity_state>(
+      gpr_atm_no_barrier_load(&tracker->current_state_atm));
   grpc_connectivity_state_watcher* w;
   if (grpc_connectivity_state_trace.enabled()) {
     const char* error_string = grpc_error_string(error);
diff --git a/src/core/lib/transport/error_utils.cc b/src/core/lib/transport/error_utils.cc
index 891576f4ba..79d904315e 100644
--- a/src/core/lib/transport/error_utils.cc
+++ b/src/core/lib/transport/error_utils.cc
@@ -32,7 +32,8 @@ static grpc_error* recursively_find_error_with_field(grpc_error* error,
   // Otherwise, search through its children.
   uint8_t slot = error->first_err;
   while (slot != UINT8_MAX) {
-    grpc_linked_error* lerr = (grpc_linked_error*)(error->arena + slot);
+    grpc_linked_error* lerr =
+        reinterpret_cast<grpc_linked_error*>(error->arena + slot);
     grpc_error* result = recursively_find_error_with_field(lerr->err, which);
     if (result) return result;
     slot = lerr->next;
@@ -62,11 +63,11 @@ void grpc_error_get_status(grpc_error* error, grpc_millis deadline,
   grpc_status_code status = GRPC_STATUS_UNKNOWN;
   intptr_t integer;
   if (grpc_error_get_int(found_error, GRPC_ERROR_INT_GRPC_STATUS, &integer)) {
-    status = (grpc_status_code)integer;
+    status = static_cast<grpc_status_code>(integer);
   } else if (grpc_error_get_int(found_error, GRPC_ERROR_INT_HTTP2_ERROR,
                                 &integer)) {
-    status = grpc_http2_error_to_grpc_status((grpc_http2_error_code)integer,
-                                             deadline);
+    status = grpc_http2_error_to_grpc_status(
+        static_cast<grpc_http2_error_code>(integer), deadline);
   }
   if (code != nullptr) *code = status;
 
@@ -76,10 +77,11 @@ void grpc_error_get_status(grpc_error* error, grpc_millis deadline,
 
   if (http_error != nullptr) {
     if (grpc_error_get_int(found_error, GRPC_ERROR_INT_HTTP2_ERROR, &integer)) {
-      *http_error = (grpc_http2_error_code)integer;
+      *http_error = static_cast<grpc_http2_error_code>(integer);
     } else if (grpc_error_get_int(found_error, GRPC_ERROR_INT_GRPC_STATUS,
                                   &integer)) {
-      *http_error = grpc_status_to_http2_error((grpc_status_code)integer);
+      *http_error =
+          grpc_status_to_http2_error(static_cast<grpc_status_code>(integer));
     } else {
       *http_error = found_error == GRPC_ERROR_NONE ? GRPC_HTTP2_NO_ERROR
                                                    : GRPC_HTTP2_INTERNAL_ERROR;
@@ -103,7 +105,8 @@ bool grpc_error_has_clear_grpc_status(grpc_error* error) {
   }
   uint8_t slot = error->first_err;
   while (slot != UINT8_MAX) {
-    grpc_linked_error* lerr = (grpc_linked_error*)(error->arena + slot);
+    grpc_linked_error* lerr =
+        reinterpret_cast<grpc_linked_error*>(error->arena + slot);
     if (grpc_error_has_clear_grpc_status(lerr->err)) {
       return true;
     }
diff --git a/src/core/lib/transport/metadata.cc b/src/core/lib/transport/metadata.cc
index cc1edd586f..e06e0b5313 100644
--- a/src/core/lib/transport/metadata.cc
+++ b/src/core/lib/transport/metadata.cc
@@ -118,8 +118,8 @@ void grpc_mdctx_global_init(void) {
     shard->count = 0;
     gpr_atm_no_barrier_store(&shard->free_estimate, 0);
     shard->capacity = INITIAL_SHARD_CAPACITY;
-    shard->elems = (interned_metadata**)gpr_zalloc(sizeof(*shard->elems) *
-                                                   shard->capacity);
+    shard->elems = static_cast<interned_metadata**>(
+        gpr_zalloc(sizeof(*shard->elems) * shard->capacity));
   }
 }
 
@@ -206,8 +206,8 @@ static void grow_mdtab(mdtab_shard* shard) {
   interned_metadata *md, *next;
   uint32_t hash;
 
-  mdtab =
-      (interned_metadata**)gpr_zalloc(sizeof(interned_metadata*) * capacity);
+  mdtab = static_cast<interned_metadata**>(
+      gpr_zalloc(sizeof(interned_metadata*) * capacity));
 
   for (i = 0; i < shard->capacity; i++) {
     for (md = shard->elems[i]; md; md = next) {
@@ -227,7 +227,7 @@ static void grow_mdtab(mdtab_shard* shard) {
 
 static void rehash_mdtab(mdtab_shard* shard) {
   if (gpr_atm_no_barrier_load(&shard->free_estimate) >
-      (gpr_atm)(shard->capacity / 4)) {
+      static_cast<gpr_atm>(shard->capacity / 4)) {
     gc_mdtab(shard);
   } else {
     grow_mdtab(shard);
@@ -244,7 +244,7 @@ grpc_mdelem grpc_mdelem_create(
     }
 
     allocated_metadata* allocated =
-        (allocated_metadata*)gpr_malloc(sizeof(*allocated));
+        static_cast<allocated_metadata*>(gpr_malloc(sizeof(*allocated)));
     allocated->key = grpc_slice_ref_internal(key);
     allocated->value = grpc_slice_ref_internal(value);
     gpr_atm_rel_store(&allocated->refcnt, 1);
@@ -292,7 +292,7 @@ grpc_mdelem grpc_mdelem_create(
   }
 
   /* not found: create a new pair */
-  md = (interned_metadata*)gpr_malloc(sizeof(interned_metadata));
+  md = static_cast<interned_metadata*>(gpr_malloc(sizeof(interned_metadata)));
   gpr_atm_rel_store(&md->refcnt, 1);
   md->key = grpc_slice_ref_internal(key);
   md->value = grpc_slice_ref_internal(value);
@@ -335,8 +335,9 @@ grpc_mdelem grpc_mdelem_from_grpc_metadata(grpc_metadata* metadata) {
       grpc_slice_maybe_static_intern(metadata->key, &changed);
   grpc_slice value_slice =
       grpc_slice_maybe_static_intern(metadata->value, &changed);
-  return grpc_mdelem_create(key_slice, value_slice,
-                            changed ? nullptr : (grpc_mdelem_data*)metadata);
+  return grpc_mdelem_create(
+      key_slice, value_slice,
+      changed ? nullptr : reinterpret_cast<grpc_mdelem_data*>(metadata));
 }
 
 static size_t get_base64_encoded_size(size_t raw_length) {
@@ -363,7 +364,8 @@ grpc_mdelem grpc_mdelem_ref(grpc_mdelem gmd DEBUG_ARGS) {
     case GRPC_MDELEM_STORAGE_STATIC:
       break;
     case GRPC_MDELEM_STORAGE_INTERNED: {
-      interned_metadata* md = (interned_metadata*)GRPC_MDELEM_DATA(gmd);
+      interned_metadata* md =
+          reinterpret_cast<interned_metadata*> GRPC_MDELEM_DATA(gmd);
 #ifndef NDEBUG
       if (grpc_trace_metadata.enabled()) {
         char* key_str = grpc_slice_to_c_string(md->key);
@@ -385,7 +387,8 @@ grpc_mdelem grpc_mdelem_ref(grpc_mdelem gmd DEBUG_ARGS) {
       break;
     }
     case GRPC_MDELEM_STORAGE_ALLOCATED: {
-      allocated_metadata* md = (allocated_metadata*)GRPC_MDELEM_DATA(gmd);
+      allocated_metadata* md =
+          reinterpret_cast<allocated_metadata*> GRPC_MDELEM_DATA(gmd);
 #ifndef NDEBUG
       if (grpc_trace_metadata.enabled()) {
         char* key_str = grpc_slice_to_c_string(md->key);
@@ -415,7 +418,8 @@ void grpc_mdelem_unref(grpc_mdelem gmd DEBUG_ARGS) {
     case GRPC_MDELEM_STORAGE_STATIC:
       break;
     case GRPC_MDELEM_STORAGE_INTERNED: {
-      interned_metadata* md = (interned_metadata*)GRPC_MDELEM_DATA(gmd);
+      interned_metadata* md =
+          reinterpret_cast<interned_metadata*> GRPC_MDELEM_DATA(gmd);
 #ifndef NDEBUG
       if (grpc_trace_metadata.enabled()) {
         char* key_str = grpc_slice_to_c_string(md->key);
@@ -441,7 +445,8 @@ void grpc_mdelem_unref(grpc_mdelem gmd DEBUG_ARGS) {
       break;
     }
     case GRPC_MDELEM_STORAGE_ALLOCATED: {
-      allocated_metadata* md = (allocated_metadata*)GRPC_MDELEM_DATA(gmd);
+      allocated_metadata* md =
+          reinterpret_cast<allocated_metadata*> GRPC_MDELEM_DATA(gmd);
 #ifndef NDEBUG
       if (grpc_trace_metadata.enabled()) {
         char* key_str = grpc_slice_to_c_string(md->key);
@@ -475,7 +480,8 @@ void* grpc_mdelem_get_user_data(grpc_mdelem md, void (*destroy_func)(void*)) {
       return (void*)grpc_static_mdelem_user_data[GRPC_MDELEM_DATA(md) -
                                                  grpc_static_mdelem_table];
     case GRPC_MDELEM_STORAGE_INTERNED: {
-      interned_metadata* im = (interned_metadata*)GRPC_MDELEM_DATA(md);
+      interned_metadata* im =
+          reinterpret_cast<interned_metadata*> GRPC_MDELEM_DATA(md);
       void* result;
       if (gpr_atm_acq_load(&im->destroy_user_data) == (gpr_atm)destroy_func) {
         return (void*)gpr_atm_no_barrier_load(&im->user_data);
@@ -500,7 +506,8 @@ void* grpc_mdelem_set_user_data(grpc_mdelem md, void (*destroy_func)(void*),
       return (void*)grpc_static_mdelem_user_data[GRPC_MDELEM_DATA(md) -
                                                  grpc_static_mdelem_table];
     case GRPC_MDELEM_STORAGE_INTERNED: {
-      interned_metadata* im = (interned_metadata*)GRPC_MDELEM_DATA(md);
+      interned_metadata* im =
+          reinterpret_cast<interned_metadata*> GRPC_MDELEM_DATA(md);
       GPR_ASSERT(!is_mdelem_static(md));
       GPR_ASSERT((user_data == nullptr) == (destroy_func == nullptr));
       gpr_mu_lock(&im->mu_user_data);
diff --git a/src/core/lib/transport/service_config.cc b/src/core/lib/transport/service_config.cc
index 5c9930a273..75196c5f88 100644
--- a/src/core/lib/transport/service_config.cc
+++ b/src/core/lib/transport/service_config.cc
@@ -60,7 +60,7 @@ struct grpc_service_config {
 
 grpc_service_config* grpc_service_config_create(const char* json_string) {
   grpc_service_config* service_config =
-      (grpc_service_config*)gpr_malloc(sizeof(*service_config));
+      static_cast<grpc_service_config*>(gpr_malloc(sizeof(*service_config)));
   service_config->json_string = gpr_strdup(json_string);
   service_config->json_tree =
       grpc_json_parse_string(service_config->json_string);
@@ -209,8 +209,8 @@ grpc_slice_hash_table* grpc_service_config_create_method_config_table(
         num_entries += count;
       }
       // Populate method config table entries.
-      entries = (grpc_slice_hash_table_entry*)gpr_malloc(
-          num_entries * sizeof(grpc_slice_hash_table_entry));
+      entries = static_cast<grpc_slice_hash_table_entry*>(
+          gpr_malloc(num_entries * sizeof(grpc_slice_hash_table_entry)));
       size_t idx = 0;
       for (grpc_json* method = field->child; method != nullptr;
            method = method->next) {
@@ -245,8 +245,8 @@ void* grpc_method_config_table_get(const grpc_slice_hash_table* table,
   if (value == nullptr) {
     char* path_str = grpc_slice_to_c_string(path);
     const char* sep = strrchr(path_str, '/') + 1;
-    const size_t len = (size_t)(sep - path_str);
-    char* buf = (char*)gpr_malloc(len + 2);  // '*' and NUL
+    const size_t len = static_cast<size_t>(sep - path_str);
+    char* buf = static_cast<char*>(gpr_malloc(len + 2));  // '*' and NUL
     memcpy(buf, path_str, len);
     buf[len] = '*';
     buf[len + 1] = '\0';
diff --git a/src/core/lib/transport/static_metadata.cc b/src/core/lib/transport/static_metadata.cc
index ebc75724cf..5994cbc265 100644
--- a/src/core/lib/transport/static_metadata.cc
+++ b/src/core/lib/transport/static_metadata.cc
@@ -340,7 +340,7 @@ static uint32_t elems_phash(uint32_t i) {
   uint32_t y = i / 99;
   uint32_t h = x;
   if (y < GPR_ARRAY_SIZE(elems_r)) {
-    uint32_t delta = (uint32_t)elems_r[y];
+    uint32_t delta = static_cast<uint32_t>(elems_r[y]);
     h += delta;
   }
   return h;
@@ -371,7 +371,7 @@ static const uint8_t elem_idxs[] = {
 
 grpc_mdelem grpc_static_mdelem_for_static_strings(int a, int b) {
   if (a == -1 || b == -1) return GRPC_MDNULL;
-  uint32_t k = (uint32_t)(a * 101 + b);
+  uint32_t k = static_cast<uint32_t>(a * 101 + b);
   uint32_t h = elems_phash(k);
   return h < GPR_ARRAY_SIZE(elem_keys) && elem_keys[h] == k &&
                  elem_idxs[h] != 255
diff --git a/src/core/lib/transport/timeout_encoding.cc b/src/core/lib/transport/timeout_encoding.cc
index 47f964af45..6800255be2 100644
--- a/src/core/lib/transport/timeout_encoding.cc
+++ b/src/core/lib/transport/timeout_encoding.cc
@@ -98,7 +98,7 @@ int grpc_http2_decode_timeout(grpc_slice text, grpc_millis* timeout) {
     ;
   /* decode numeric part */
   for (; p != end && *p >= '0' && *p <= '9'; p++) {
-    int32_t digit = (int32_t)(*p - (uint8_t)'0');
+    int32_t digit = static_cast<int32_t>(*p - static_cast<uint8_t>('0'));
     have_digit = 1;
     /* spec allows max. 8 digits, but we allow values up to 1,000,000,000 */
     if (x >= (100 * 1000 * 1000)) {
@@ -138,5 +138,6 @@ int grpc_http2_decode_timeout(grpc_slice text, grpc_millis* timeout) {
       return 0;
   }
   p++;
-  return is_all_whitespace((const char*)p, (const char*)end);
+  return is_all_whitespace(reinterpret_cast<const char*>(p),
+                           reinterpret_cast<const char*>(end));
 }
diff --git a/src/core/lib/transport/transport.cc b/src/core/lib/transport/transport.cc
index ea0380e591..d71d4fdd76 100644
--- a/src/core/lib/transport/transport.cc
+++ b/src/core/lib/transport/transport.cc
@@ -101,7 +101,7 @@ grpc_slice grpc_slice_from_stream_owned_buffer(grpc_stream_refcount* refcount,
   slice_stream_ref(&refcount->slice_refcount);
   grpc_slice res;
   res.refcount = &refcount->slice_refcount;
-  res.data.refcounted.bytes = (uint8_t*)buffer;
+  res.data.refcounted.bytes = static_cast<uint8_t*>(buffer);
   res.data.refcounted.length = length;
   return res;
 }
@@ -233,13 +233,14 @@ typedef struct {
 } made_transport_op;
 
 static void destroy_made_transport_op(void* arg, grpc_error* error) {
-  made_transport_op* op = (made_transport_op*)arg;
+  made_transport_op* op = static_cast<made_transport_op*>(arg);
   GRPC_CLOSURE_SCHED(op->inner_on_complete, GRPC_ERROR_REF(error));
   gpr_free(op);
 }
 
 grpc_transport_op* grpc_make_transport_op(grpc_closure* on_complete) {
-  made_transport_op* op = (made_transport_op*)gpr_malloc(sizeof(*op));
+  made_transport_op* op =
+      static_cast<made_transport_op*>(gpr_malloc(sizeof(*op)));
   GRPC_CLOSURE_INIT(&op->outer_on_complete, destroy_made_transport_op, op,
                     grpc_schedule_on_exec_ctx);
   op->inner_on_complete = on_complete;
@@ -256,7 +257,7 @@ typedef struct {
 } made_transport_stream_op;
 
 static void destroy_made_transport_stream_op(void* arg, grpc_error* error) {
-  made_transport_stream_op* op = (made_transport_stream_op*)arg;
+  made_transport_stream_op* op = static_cast<made_transport_stream_op*>(arg);
   grpc_closure* c = op->inner_on_complete;
   gpr_free(op);
   GRPC_CLOSURE_RUN(c, GRPC_ERROR_REF(error));
@@ -265,7 +266,7 @@ static void destroy_made_transport_stream_op(void* arg, grpc_error* error) {
 grpc_transport_stream_op_batch* grpc_make_transport_stream_op(
     grpc_closure* on_complete) {
   made_transport_stream_op* op =
-      (made_transport_stream_op*)gpr_zalloc(sizeof(*op));
+      static_cast<made_transport_stream_op*>(gpr_zalloc(sizeof(*op)));
   op->op.payload = &op->payload;
   GRPC_CLOSURE_INIT(&op->outer_on_complete, destroy_made_transport_stream_op,
                     op, grpc_schedule_on_exec_ctx);
diff --git a/src/core/tsi/fake_transport_security.cc b/src/core/tsi/fake_transport_security.cc
index 7d5aaa7305..b5b7203d20 100644
--- a/src/core/tsi/fake_transport_security.cc
+++ b/src/core/tsi/fake_transport_security.cc
@@ -102,7 +102,7 @@ static tsi_result tsi_fake_handshake_message_from_string(
   for (int i = 0; i < TSI_FAKE_HANDSHAKE_MESSAGE_MAX; i++) {
     if (strncmp(msg_string, tsi_fake_handshake_message_strings[i],
                 strlen(tsi_fake_handshake_message_strings[i])) == 0) {
-      *msg = (tsi_fake_handshake_message)i;
+      *msg = static_cast<tsi_fake_handshake_message>(i);
       return TSI_OK;
     }
   }
@@ -111,15 +111,16 @@ static tsi_result tsi_fake_handshake_message_from_string(
 }
 
 static uint32_t load32_little_endian(const unsigned char* buf) {
-  return ((uint32_t)(buf[0]) | (uint32_t)(buf[1] << 8) |
-          (uint32_t)(buf[2] << 16) | (uint32_t)(buf[3] << 24));
+  return (static_cast<uint32_t>(buf[0]) | static_cast<uint32_t>(buf[1] << 8) |
+          static_cast<uint32_t>(buf[2] << 16) |
+          static_cast<uint32_t>(buf[3] << 24));
 }
 
 static void store32_little_endian(uint32_t value, unsigned char* buf) {
-  buf[3] = (unsigned char)((value >> 24) & 0xFF);
-  buf[2] = (unsigned char)((value >> 16) & 0xFF);
-  buf[1] = (unsigned char)((value >> 8) & 0xFF);
-  buf[0] = (unsigned char)((value)&0xFF);
+  buf[3] = static_cast<unsigned char>((value >> 24) & 0xFF);
+  buf[2] = static_cast<unsigned char>((value >> 16) & 0xFF);
+  buf[1] = static_cast<unsigned char>((value >> 8) & 0xFF);
+  buf[0] = static_cast<unsigned char>((value)&0xFF);
 }
 
 static uint32_t read_frame_size(const grpc_slice_buffer* sb) {
@@ -155,10 +156,11 @@ static void tsi_fake_frame_reset(tsi_fake_frame* frame, int needs_draining) {
 static void tsi_fake_frame_ensure_size(tsi_fake_frame* frame) {
   if (frame->data == nullptr) {
     frame->allocated_size = frame->size;
-    frame->data = (unsigned char*)gpr_malloc(frame->allocated_size);
+    frame->data =
+        static_cast<unsigned char*>(gpr_malloc(frame->allocated_size));
   } else if (frame->size > frame->allocated_size) {
     unsigned char* new_data =
-        (unsigned char*)gpr_realloc(frame->data, frame->size);
+        static_cast<unsigned char*>(gpr_realloc(frame->data, frame->size));
     frame->data = new_data;
     frame->allocated_size = frame->size;
   }
@@ -177,7 +179,8 @@ static tsi_result tsi_fake_frame_decode(const unsigned char* incoming_bytes,
   if (frame->needs_draining) return TSI_INTERNAL_ERROR;
   if (frame->data == nullptr) {
     frame->allocated_size = TSI_FAKE_FRAME_INITIAL_ALLOCATED_SIZE;
-    frame->data = (unsigned char*)gpr_malloc(frame->allocated_size);
+    frame->data =
+        static_cast<unsigned char*>(gpr_malloc(frame->allocated_size));
   }
 
   if (frame->offset < TSI_FAKE_FRAME_HEADER_SIZE) {
@@ -187,7 +190,7 @@ static tsi_result tsi_fake_frame_decode(const unsigned char* incoming_bytes,
       memcpy(frame->data + frame->offset, bytes_cursor, available_size);
       bytes_cursor += available_size;
       frame->offset += available_size;
-      *incoming_bytes_size = (size_t)(bytes_cursor - incoming_bytes);
+      *incoming_bytes_size = static_cast<size_t>(bytes_cursor - incoming_bytes);
       return TSI_INCOMPLETE_DATA;
     }
     memcpy(frame->data + frame->offset, bytes_cursor, to_read_size);
@@ -203,12 +206,12 @@ static tsi_result tsi_fake_frame_decode(const unsigned char* incoming_bytes,
     memcpy(frame->data + frame->offset, bytes_cursor, available_size);
     frame->offset += available_size;
     bytes_cursor += available_size;
-    *incoming_bytes_size = (size_t)(bytes_cursor - incoming_bytes);
+    *incoming_bytes_size = static_cast<size_t>(bytes_cursor - incoming_bytes);
     return TSI_INCOMPLETE_DATA;
   }
   memcpy(frame->data + frame->offset, bytes_cursor, to_read_size);
   bytes_cursor += to_read_size;
-  *incoming_bytes_size = (size_t)(bytes_cursor - incoming_bytes);
+  *incoming_bytes_size = static_cast<size_t>(bytes_cursor - incoming_bytes);
   tsi_fake_frame_reset(frame, 1 /* needs_draining */);
   return TSI_OK;
 }
@@ -239,7 +242,7 @@ static tsi_result tsi_fake_frame_set_data(unsigned char* data, size_t data_size,
   frame->offset = 0;
   frame->size = data_size + TSI_FAKE_FRAME_HEADER_SIZE;
   tsi_fake_frame_ensure_size(frame);
-  store32_little_endian((uint32_t)frame->size, frame->data);
+  store32_little_endian(static_cast<uint32_t>(frame->size), frame->data);
   memcpy(frame->data + TSI_FAKE_FRAME_HEADER_SIZE, data, data_size);
   tsi_fake_frame_reset(frame, 1 /* needs draining */);
   return TSI_OK;
@@ -258,7 +261,8 @@ static tsi_result fake_protector_protect(tsi_frame_protector* self,
                                          unsigned char* protected_output_frames,
                                          size_t* protected_output_frames_size) {
   tsi_result result = TSI_OK;
-  tsi_fake_frame_protector* impl = (tsi_fake_frame_protector*)self;
+  tsi_fake_frame_protector* impl =
+      reinterpret_cast<tsi_fake_frame_protector*>(self);
   unsigned char frame_header[TSI_FAKE_FRAME_HEADER_SIZE];
   tsi_fake_frame* frame = &impl->protect_frame;
   size_t saved_output_size = *protected_output_frames_size;
@@ -287,7 +291,8 @@ static tsi_result fake_protector_protect(tsi_frame_protector* self,
   if (frame->size == 0) {
     /* New frame, create a header. */
     size_t written_in_frame_size = 0;
-    store32_little_endian((uint32_t)impl->max_frame_size, frame_header);
+    store32_little_endian(static_cast<uint32_t>(impl->max_frame_size),
+                          frame_header);
     written_in_frame_size = TSI_FAKE_FRAME_HEADER_SIZE;
     result = tsi_fake_frame_decode(frame_header, &written_in_frame_size, frame);
     if (result != TSI_INCOMPLETE_DATA) {
@@ -317,14 +322,15 @@ static tsi_result fake_protector_protect_flush(
     tsi_frame_protector* self, unsigned char* protected_output_frames,
     size_t* protected_output_frames_size, size_t* still_pending_size) {
   tsi_result result = TSI_OK;
-  tsi_fake_frame_protector* impl = (tsi_fake_frame_protector*)self;
+  tsi_fake_frame_protector* impl =
+      reinterpret_cast<tsi_fake_frame_protector*>(self);
   tsi_fake_frame* frame = &impl->protect_frame;
   if (!frame->needs_draining) {
     /* Create a short frame. */
     frame->size = frame->offset;
     frame->offset = 0;
     frame->needs_draining = 1;
-    store32_little_endian((uint32_t)frame->size,
+    store32_little_endian(static_cast<uint32_t>(frame->size),
                           frame->data); /* Overwrite header. */
   }
   result = tsi_fake_frame_encode(protected_output_frames,
@@ -339,7 +345,8 @@ static tsi_result fake_protector_unprotect(
     size_t* protected_frames_bytes_size, unsigned char* unprotected_bytes,
     size_t* unprotected_bytes_size) {
   tsi_result result = TSI_OK;
-  tsi_fake_frame_protector* impl = (tsi_fake_frame_protector*)self;
+  tsi_fake_frame_protector* impl =
+      reinterpret_cast<tsi_fake_frame_protector*>(self);
   tsi_fake_frame* frame = &impl->unprotect_frame;
   size_t saved_output_size = *unprotected_bytes_size;
   size_t drained_size = 0;
@@ -384,7 +391,8 @@ static tsi_result fake_protector_unprotect(
 }
 
 static void fake_protector_destroy(tsi_frame_protector* self) {
-  tsi_fake_frame_protector* impl = (tsi_fake_frame_protector*)self;
+  tsi_fake_frame_protector* impl =
+      reinterpret_cast<tsi_fake_frame_protector*>(self);
   tsi_fake_frame_destruct(&impl->protect_frame);
   tsi_fake_frame_destruct(&impl->unprotect_frame);
   gpr_free(self);
@@ -407,14 +415,15 @@ static tsi_result fake_zero_copy_grpc_protector_protect(
     return TSI_INVALID_ARGUMENT;
   }
   tsi_fake_zero_copy_grpc_protector* impl =
-      (tsi_fake_zero_copy_grpc_protector*)self;
+      reinterpret_cast<tsi_fake_zero_copy_grpc_protector*>(self);
   /* Protects each frame. */
   while (unprotected_slices->length > 0) {
     size_t frame_length =
         GPR_MIN(impl->max_frame_size,
                 unprotected_slices->length + TSI_FAKE_FRAME_HEADER_SIZE);
     grpc_slice slice = GRPC_SLICE_MALLOC(TSI_FAKE_FRAME_HEADER_SIZE);
-    store32_little_endian((uint32_t)frame_length, GRPC_SLICE_START_PTR(slice));
+    store32_little_endian(static_cast<uint32_t>(frame_length),
+                          GRPC_SLICE_START_PTR(slice));
     grpc_slice_buffer_add(protected_slices, slice);
     size_t data_length = frame_length - TSI_FAKE_FRAME_HEADER_SIZE;
     grpc_slice_buffer_move_first(unprotected_slices, data_length,
@@ -431,7 +440,7 @@ static tsi_result fake_zero_copy_grpc_protector_unprotect(
     return TSI_INVALID_ARGUMENT;
   }
   tsi_fake_zero_copy_grpc_protector* impl =
-      (tsi_fake_zero_copy_grpc_protector*)self;
+      reinterpret_cast<tsi_fake_zero_copy_grpc_protector*>(self);
   grpc_slice_buffer_move_into(protected_slices, &impl->protected_sb);
   /* Unprotect each frame, if we get a full frame. */
   while (impl->protected_sb.length >= TSI_FAKE_FRAME_HEADER_SIZE) {
@@ -462,7 +471,7 @@ static void fake_zero_copy_grpc_protector_destroy(
     tsi_zero_copy_grpc_protector* self) {
   if (self == nullptr) return;
   tsi_fake_zero_copy_grpc_protector* impl =
-      (tsi_fake_zero_copy_grpc_protector*)self;
+      reinterpret_cast<tsi_fake_zero_copy_grpc_protector*>(self);
   grpc_slice_buffer_destroy_internal(&impl->header_sb);
   grpc_slice_buffer_destroy_internal(&impl->protected_sb);
   gpr_free(impl);
@@ -520,7 +529,8 @@ static tsi_result fake_handshaker_result_get_unused_bytes(
 }
 
 static void fake_handshaker_result_destroy(tsi_handshaker_result* self) {
-  fake_handshaker_result* result = (fake_handshaker_result*)self;
+  fake_handshaker_result* result =
+      reinterpret_cast<fake_handshaker_result*>(self);
   gpr_free(result->unused_bytes);
   gpr_free(self);
 }
@@ -541,10 +551,11 @@ static tsi_result fake_handshaker_result_create(
     return TSI_INVALID_ARGUMENT;
   }
   fake_handshaker_result* result =
-      (fake_handshaker_result*)gpr_zalloc(sizeof(*result));
+      static_cast<fake_handshaker_result*>(gpr_zalloc(sizeof(*result)));
   result->base.vtable = &handshaker_result_vtable;
   if (unused_bytes_size > 0) {
-    result->unused_bytes = (unsigned char*)gpr_malloc(unused_bytes_size);
+    result->unused_bytes =
+        static_cast<unsigned char*>(gpr_malloc(unused_bytes_size));
     memcpy(result->unused_bytes, unused_bytes, unused_bytes_size);
   }
   result->unused_bytes_size = unused_bytes_size;
@@ -556,7 +567,7 @@ static tsi_result fake_handshaker_result_create(
 
 static tsi_result fake_handshaker_get_bytes_to_send_to_peer(
     tsi_handshaker* self, unsigned char* bytes, size_t* bytes_size) {
-  tsi_fake_handshaker* impl = (tsi_fake_handshaker*)self;
+  tsi_fake_handshaker* impl = reinterpret_cast<tsi_fake_handshaker*>(self);
   tsi_result result = TSI_OK;
   if (impl->needs_incoming_message || impl->result == TSI_OK) {
     *bytes_size = 0;
@@ -564,7 +575,7 @@ static tsi_result fake_handshaker_get_bytes_to_send_to_peer(
   }
   if (!impl->outgoing_frame.needs_draining) {
     tsi_fake_handshake_message next_message_to_send =
-        (tsi_fake_handshake_message)(impl->next_message_to_send + 2);
+        static_cast<tsi_fake_handshake_message>(impl->next_message_to_send + 2);
     const char* msg_string =
         tsi_fake_handshake_message_to_string(impl->next_message_to_send);
     result = tsi_fake_frame_set_data((unsigned char*)msg_string,
@@ -598,9 +609,9 @@ static tsi_result fake_handshaker_get_bytes_to_send_to_peer(
 static tsi_result fake_handshaker_process_bytes_from_peer(
     tsi_handshaker* self, const unsigned char* bytes, size_t* bytes_size) {
   tsi_result result = TSI_OK;
-  tsi_fake_handshaker* impl = (tsi_fake_handshaker*)self;
+  tsi_fake_handshaker* impl = reinterpret_cast<tsi_fake_handshaker*>(self);
   tsi_fake_handshake_message expected_msg =
-      (tsi_fake_handshake_message)(impl->next_message_to_send - 1);
+      static_cast<tsi_fake_handshake_message>(impl->next_message_to_send - 1);
   tsi_fake_handshake_message received_msg;
 
   if (!impl->needs_incoming_message || impl->result == TSI_OK) {
@@ -612,7 +623,8 @@ static tsi_result fake_handshaker_process_bytes_from_peer(
 
   /* We now have a complete frame. */
   result = tsi_fake_handshake_message_from_string(
-      (const char*)impl->incoming_frame.data + TSI_FAKE_FRAME_HEADER_SIZE,
+      reinterpret_cast<const char*>(impl->incoming_frame.data) +
+          TSI_FAKE_FRAME_HEADER_SIZE,
       &received_msg);
   if (result != TSI_OK) {
     impl->result = result;
@@ -640,12 +652,12 @@ static tsi_result fake_handshaker_process_bytes_from_peer(
 }
 
 static tsi_result fake_handshaker_get_result(tsi_handshaker* self) {
-  tsi_fake_handshaker* impl = (tsi_fake_handshaker*)self;
+  tsi_fake_handshaker* impl = reinterpret_cast<tsi_fake_handshaker*>(self);
   return impl->result;
 }
 
 static void fake_handshaker_destroy(tsi_handshaker* self) {
-  tsi_fake_handshaker* impl = (tsi_fake_handshaker*)self;
+  tsi_fake_handshaker* impl = reinterpret_cast<tsi_fake_handshaker*>(self);
   tsi_fake_frame_destruct(&impl->incoming_frame);
   tsi_fake_frame_destruct(&impl->outgoing_frame);
   gpr_free(impl->outgoing_bytes_buffer);
@@ -663,7 +675,8 @@ static tsi_result fake_handshaker_next(
       handshaker_result == nullptr) {
     return TSI_INVALID_ARGUMENT;
   }
-  tsi_fake_handshaker* handshaker = (tsi_fake_handshaker*)self;
+  tsi_fake_handshaker* handshaker =
+      reinterpret_cast<tsi_fake_handshaker*>(self);
   tsi_result result = TSI_OK;
 
   /* Decode and process a handshake frame from the peer. */
@@ -684,9 +697,9 @@ static tsi_result fake_handshaker_next(
     offset += sent_bytes_size;
     if (result == TSI_INCOMPLETE_DATA) {
       handshaker->outgoing_bytes_buffer_size *= 2;
-      handshaker->outgoing_bytes_buffer =
-          (unsigned char*)gpr_realloc(handshaker->outgoing_bytes_buffer,
-                                      handshaker->outgoing_bytes_buffer_size);
+      handshaker->outgoing_bytes_buffer = static_cast<unsigned char*>(
+          gpr_realloc(handshaker->outgoing_bytes_buffer,
+                      handshaker->outgoing_bytes_buffer_size));
     }
   } while (result == TSI_INCOMPLETE_DATA);
   if (result != TSI_OK) return result;
@@ -727,14 +740,15 @@ static const tsi_handshaker_vtable handshaker_vtable = {
 };
 
 tsi_handshaker* tsi_create_fake_handshaker(int is_client) {
-  tsi_fake_handshaker* impl = (tsi_fake_handshaker*)gpr_zalloc(sizeof(*impl));
+  tsi_fake_handshaker* impl =
+      static_cast<tsi_fake_handshaker*>(gpr_zalloc(sizeof(*impl)));
   impl->base.vtable = &handshaker_vtable;
   impl->is_client = is_client;
   impl->result = TSI_HANDSHAKE_IN_PROGRESS;
   impl->outgoing_bytes_buffer_size =
       TSI_FAKE_HANDSHAKER_OUTGOING_BUFFER_INITIAL_SIZE;
   impl->outgoing_bytes_buffer =
-      (unsigned char*)gpr_malloc(impl->outgoing_bytes_buffer_size);
+      static_cast<unsigned char*>(gpr_malloc(impl->outgoing_bytes_buffer_size));
   if (is_client) {
     impl->needs_incoming_message = 0;
     impl->next_message_to_send = TSI_FAKE_CLIENT_INIT;
@@ -748,7 +762,7 @@ tsi_handshaker* tsi_create_fake_handshaker(int is_client) {
 tsi_frame_protector* tsi_create_fake_frame_protector(
     size_t* max_protected_frame_size) {
   tsi_fake_frame_protector* impl =
-      (tsi_fake_frame_protector*)gpr_zalloc(sizeof(*impl));
+      static_cast<tsi_fake_frame_protector*>(gpr_zalloc(sizeof(*impl)));
   impl->max_frame_size = (max_protected_frame_size == nullptr)
                              ? TSI_FAKE_DEFAULT_FRAME_SIZE
                              : *max_protected_frame_size;
@@ -759,7 +773,8 @@ tsi_frame_protector* tsi_create_fake_frame_protector(
 tsi_zero_copy_grpc_protector* tsi_create_fake_zero_copy_grpc_protector(
     size_t* max_protected_frame_size) {
   tsi_fake_zero_copy_grpc_protector* impl =
-      (tsi_fake_zero_copy_grpc_protector*)gpr_zalloc(sizeof(*impl));
+      static_cast<tsi_fake_zero_copy_grpc_protector*>(
+          gpr_zalloc(sizeof(*impl)));
   grpc_slice_buffer_init(&impl->header_sb);
   grpc_slice_buffer_init(&impl->protected_sb);
   impl->max_frame_size = (max_protected_frame_size == nullptr)
diff --git a/src/core/tsi/ssl_transport_security.cc b/src/core/tsi/ssl_transport_security.cc
index 6de02d4952..643b5a5c79 100644
--- a/src/core/tsi/ssl_transport_security.cc
+++ b/src/core/tsi/ssl_transport_security.cc
@@ -126,7 +126,7 @@ static void openssl_locking_cb(int mode, int type, const char* file, int line) {
 }
 
 static unsigned long openssl_thread_id_cb(void) {
-  return (unsigned long)gpr_thd_currentid();
+  return static_cast<unsigned long>(gpr_thd_currentid());
 }
 
 static void init_openssl(void) {
@@ -137,7 +137,8 @@ static void init_openssl(void) {
   OpenSSL_add_all_algorithms();
   num_locks = CRYPTO_num_locks();
   GPR_ASSERT(num_locks > 0);
-  openssl_mutexes = (gpr_mu*)gpr_malloc((size_t)num_locks * sizeof(gpr_mu));
+  openssl_mutexes = static_cast<gpr_mu*>(
+      gpr_malloc(static_cast<size_t>(num_locks) * sizeof(gpr_mu)));
   for (i = 0; i < CRYPTO_num_locks(); i++) {
     gpr_mu_init(&openssl_mutexes[i]);
   }
@@ -254,7 +255,7 @@ static tsi_result ssl_get_x509_common_name(X509* cert, unsigned char** utf8,
     gpr_log(GPR_ERROR, "Could not extract utf8 from asn1 string.");
     return TSI_OUT_OF_RESOURCES;
   }
-  *utf8_size = (size_t)utf8_returned_size;
+  *utf8_size = static_cast<size_t>(utf8_returned_size);
   return TSI_OK;
 }
 
@@ -275,8 +276,8 @@ static tsi_result peer_property_from_x509_common_name(
   }
   result = tsi_construct_string_peer_property(
       TSI_X509_SUBJECT_COMMON_NAME_PEER_PROPERTY,
-      common_name == nullptr ? "" : (const char*)common_name, common_name_size,
-      property);
+      common_name == nullptr ? "" : reinterpret_cast<const char*>(common_name),
+      common_name_size, property);
   OPENSSL_free(common_name);
   return result;
 }
@@ -295,7 +296,8 @@ static tsi_result add_pem_certificate(X509* cert, tsi_peer_property* property) {
     return TSI_INTERNAL_ERROR;
   }
   tsi_result result = tsi_construct_string_peer_property(
-      TSI_X509_PEM_CERT_PROPERTY, (const char*)contents, (size_t)len, property);
+      TSI_X509_PEM_CERT_PROPERTY, (const char*)contents,
+      static_cast<size_t>(len), property);
   BIO_free(bio);
   return result;
 }
@@ -324,8 +326,9 @@ static tsi_result add_subject_alt_names_properties_to_peer(
         break;
       }
       result = tsi_construct_string_peer_property(
-          TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY, (const char*)name,
-          (size_t)name_size, &peer->properties[peer->property_count++]);
+          TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY,
+          reinterpret_cast<const char*>(name), static_cast<size_t>(name_size),
+          &peer->properties[peer->property_count++]);
       OPENSSL_free(name);
     } else if (subject_alt_name->type == GEN_IPADD) {
       char ntop_buf[INET6_ADDRSTRLEN];
@@ -361,17 +364,18 @@ static tsi_result add_subject_alt_names_properties_to_peer(
 static tsi_result peer_from_x509(X509* cert, int include_certificate_type,
                                  tsi_peer* peer) {
   /* TODO(jboeuf): Maybe add more properties. */
-  GENERAL_NAMES* subject_alt_names = (GENERAL_NAMES*)X509_get_ext_d2i(
-      cert, NID_subject_alt_name, nullptr, nullptr);
-  int subject_alt_name_count = (subject_alt_names != nullptr)
-                                   ? (int)sk_GENERAL_NAME_num(subject_alt_names)
-                                   : 0;
+  GENERAL_NAMES* subject_alt_names = static_cast<GENERAL_NAMES*>(
+      X509_get_ext_d2i(cert, NID_subject_alt_name, nullptr, nullptr));
+  int subject_alt_name_count =
+      (subject_alt_names != nullptr)
+          ? static_cast<int>(sk_GENERAL_NAME_num(subject_alt_names))
+          : 0;
   size_t property_count;
   tsi_result result;
   GPR_ASSERT(subject_alt_name_count >= 0);
-  property_count = (include_certificate_type ? (size_t)1 : 0) +
+  property_count = (include_certificate_type ? static_cast<size_t>(1) : 0) +
                    2 /* common name, certificate */ +
-                   (size_t)subject_alt_name_count;
+                   static_cast<size_t>(subject_alt_name_count);
   result = tsi_construct_peer(property_count, peer);
   if (result != TSI_OK) return result;
   do {
@@ -391,7 +395,7 @@ static tsi_result peer_from_x509(X509* cert, int include_certificate_type,
 
     if (subject_alt_name_count != 0) {
       result = add_subject_alt_names_properties_to_peer(
-          peer, subject_alt_names, (size_t)subject_alt_name_count);
+          peer, subject_alt_names, static_cast<size_t>(subject_alt_name_count));
       if (result != TSI_OK) break;
     }
   } while (0);
@@ -408,7 +412,7 @@ static void log_ssl_error_stack(void) {
   unsigned long err;
   while ((err = ERR_get_error()) != 0) {
     char details[256];
-    ERR_error_string_n((uint32_t)err, details, sizeof(details));
+    ERR_error_string_n(static_cast<uint32_t>(err), details, sizeof(details));
     gpr_log(GPR_ERROR, "%s", details);
   }
 }
@@ -418,8 +422,8 @@ static tsi_result do_ssl_read(SSL* ssl, unsigned char* unprotected_bytes,
                               size_t* unprotected_bytes_size) {
   int read_from_ssl;
   GPR_ASSERT(*unprotected_bytes_size <= INT_MAX);
-  read_from_ssl =
-      SSL_read(ssl, unprotected_bytes, (int)*unprotected_bytes_size);
+  read_from_ssl = SSL_read(ssl, unprotected_bytes,
+                           static_cast<int>(*unprotected_bytes_size));
   if (read_from_ssl <= 0) {
     read_from_ssl = SSL_get_error(ssl, read_from_ssl);
     switch (read_from_ssl) {
@@ -442,7 +446,7 @@ static tsi_result do_ssl_read(SSL* ssl, unsigned char* unprotected_bytes,
         return TSI_PROTOCOL_FAILURE;
     }
   }
-  *unprotected_bytes_size = (size_t)read_from_ssl;
+  *unprotected_bytes_size = static_cast<size_t>(read_from_ssl);
   return TSI_OK;
 }
 
@@ -451,8 +455,8 @@ static tsi_result do_ssl_write(SSL* ssl, unsigned char* unprotected_bytes,
                                size_t unprotected_bytes_size) {
   int ssl_write_result;
   GPR_ASSERT(unprotected_bytes_size <= INT_MAX);
-  ssl_write_result =
-      SSL_write(ssl, unprotected_bytes, (int)unprotected_bytes_size);
+  ssl_write_result = SSL_write(ssl, unprotected_bytes,
+                               static_cast<int>(unprotected_bytes_size));
   if (ssl_write_result < 0) {
     ssl_write_result = SSL_get_error(ssl, ssl_write_result);
     if (ssl_write_result == SSL_ERROR_WANT_READ) {
@@ -476,7 +480,8 @@ static tsi_result ssl_ctx_use_certificate_chain(SSL_CTX* context,
   X509* certificate = nullptr;
   BIO* pem;
   GPR_ASSERT(pem_cert_chain_size <= INT_MAX);
-  pem = BIO_new_mem_buf((void*)pem_cert_chain, (int)pem_cert_chain_size);
+  pem = BIO_new_mem_buf((void*)pem_cert_chain,
+                        static_cast<int>(pem_cert_chain_size));
   if (pem == nullptr) return TSI_OUT_OF_RESOURCES;
 
   do {
@@ -519,7 +524,7 @@ static tsi_result ssl_ctx_use_private_key(SSL_CTX* context, const char* pem_key,
   EVP_PKEY* private_key = nullptr;
   BIO* pem;
   GPR_ASSERT(pem_key_size <= INT_MAX);
-  pem = BIO_new_mem_buf((void*)pem_key, (int)pem_key_size);
+  pem = BIO_new_mem_buf((void*)pem_key, static_cast<int>(pem_key_size));
   if (pem == nullptr) return TSI_OUT_OF_RESOURCES;
   do {
     private_key = PEM_read_bio_PrivateKey(pem, nullptr, nullptr, (void*)"");
@@ -551,7 +556,7 @@ static tsi_result ssl_ctx_load_verification_certs(SSL_CTX* context,
   BIO* pem;
   X509_STORE* root_store;
   GPR_ASSERT(pem_roots_size <= INT_MAX);
-  pem = BIO_new_mem_buf((void*)pem_roots, (int)pem_roots_size);
+  pem = BIO_new_mem_buf((void*)pem_roots, static_cast<int>(pem_roots_size));
   root_store = SSL_CTX_get_cert_store(context);
   if (root_store == nullptr) return TSI_INVALID_ARGUMENT;
   if (pem == nullptr) return TSI_OUT_OF_RESOURCES;
@@ -655,7 +660,7 @@ static tsi_result extract_x509_subject_names_from_pem_cert(const char* pem_cert,
   tsi_result result = TSI_OK;
   X509* cert = nullptr;
   BIO* pem;
-  pem = BIO_new_mem_buf((void*)pem_cert, (int)strlen(pem_cert));
+  pem = BIO_new_mem_buf((void*)pem_cert, static_cast<int>(strlen(pem_cert)));
   if (pem == nullptr) return TSI_OUT_OF_RESOURCES;
 
   cert = PEM_read_bio_X509(pem, nullptr, nullptr, (void*)"");
@@ -683,23 +688,25 @@ static tsi_result build_alpn_protocol_name_list(
     size_t length =
         alpn_protocols[i] == nullptr ? 0 : strlen(alpn_protocols[i]);
     if (length == 0 || length > 255) {
-      gpr_log(GPR_ERROR, "Invalid protocol name length: %d.", (int)length);
+      gpr_log(GPR_ERROR, "Invalid protocol name length: %d.",
+              static_cast<int>(length));
       return TSI_INVALID_ARGUMENT;
     }
     *protocol_name_list_length += length + 1;
   }
-  *protocol_name_list = (unsigned char*)gpr_malloc(*protocol_name_list_length);
+  *protocol_name_list =
+      static_cast<unsigned char*>(gpr_malloc(*protocol_name_list_length));
   if (*protocol_name_list == nullptr) return TSI_OUT_OF_RESOURCES;
   current = *protocol_name_list;
   for (i = 0; i < num_alpn_protocols; i++) {
     size_t length = strlen(alpn_protocols[i]);
-    *(current++) = (uint8_t)length; /* max checked above. */
+    *(current++) = static_cast<uint8_t>(length); /* max checked above. */
     memcpy(current, alpn_protocols[i], length);
     current += length;
   }
   /* Safety check. */
   if ((current < *protocol_name_list) ||
-      ((uintptr_t)(current - *protocol_name_list) !=
+      (static_cast<uintptr_t>(current - *protocol_name_list) !=
        *protocol_name_list_length)) {
     return TSI_INTERNAL_ERROR;
   }
@@ -721,24 +728,25 @@ static tsi_result ssl_protector_protect(tsi_frame_protector* self,
                                         size_t* unprotected_bytes_size,
                                         unsigned char* protected_output_frames,
                                         size_t* protected_output_frames_size) {
-  tsi_ssl_frame_protector* impl = (tsi_ssl_frame_protector*)self;
+  tsi_ssl_frame_protector* impl =
+      reinterpret_cast<tsi_ssl_frame_protector*>(self);
   int read_from_ssl;
   size_t available;
   tsi_result result = TSI_OK;
 
   /* First see if we have some pending data in the SSL BIO. */
-  int pending_in_ssl = (int)BIO_pending(impl->network_io);
+  int pending_in_ssl = static_cast<int>(BIO_pending(impl->network_io));
   if (pending_in_ssl > 0) {
     *unprotected_bytes_size = 0;
     GPR_ASSERT(*protected_output_frames_size <= INT_MAX);
     read_from_ssl = BIO_read(impl->network_io, protected_output_frames,
-                             (int)*protected_output_frames_size);
+                             static_cast<int>(*protected_output_frames_size));
     if (read_from_ssl < 0) {
       gpr_log(GPR_ERROR,
               "Could not read from BIO even though some data is pending");
       return TSI_INTERNAL_ERROR;
     }
-    *protected_output_frames_size = (size_t)read_from_ssl;
+    *protected_output_frames_size = static_cast<size_t>(read_from_ssl);
     return TSI_OK;
   }
 
@@ -760,12 +768,12 @@ static tsi_result ssl_protector_protect(tsi_frame_protector* self,
 
   GPR_ASSERT(*protected_output_frames_size <= INT_MAX);
   read_from_ssl = BIO_read(impl->network_io, protected_output_frames,
-                           (int)*protected_output_frames_size);
+                           static_cast<int>(*protected_output_frames_size));
   if (read_from_ssl < 0) {
     gpr_log(GPR_ERROR, "Could not read from BIO after SSL_write.");
     return TSI_INTERNAL_ERROR;
   }
-  *protected_output_frames_size = (size_t)read_from_ssl;
+  *protected_output_frames_size = static_cast<size_t>(read_from_ssl);
   *unprotected_bytes_size = available;
   impl->buffer_offset = 0;
   return TSI_OK;
@@ -775,7 +783,8 @@ static tsi_result ssl_protector_protect_flush(
     tsi_frame_protector* self, unsigned char* protected_output_frames,
     size_t* protected_output_frames_size, size_t* still_pending_size) {
   tsi_result result = TSI_OK;
-  tsi_ssl_frame_protector* impl = (tsi_ssl_frame_protector*)self;
+  tsi_ssl_frame_protector* impl =
+      reinterpret_cast<tsi_ssl_frame_protector*>(self);
   int read_from_ssl = 0;
   int pending;
 
@@ -785,22 +794,22 @@ static tsi_result ssl_protector_protect_flush(
     impl->buffer_offset = 0;
   }
 
-  pending = (int)BIO_pending(impl->network_io);
+  pending = static_cast<int>(BIO_pending(impl->network_io));
   GPR_ASSERT(pending >= 0);
-  *still_pending_size = (size_t)pending;
+  *still_pending_size = static_cast<size_t>(pending);
   if (*still_pending_size == 0) return TSI_OK;
 
   GPR_ASSERT(*protected_output_frames_size <= INT_MAX);
   read_from_ssl = BIO_read(impl->network_io, protected_output_frames,
-                           (int)*protected_output_frames_size);
+                           static_cast<int>(*protected_output_frames_size));
   if (read_from_ssl <= 0) {
     gpr_log(GPR_ERROR, "Could not read from BIO after SSL_write.");
     return TSI_INTERNAL_ERROR;
   }
-  *protected_output_frames_size = (size_t)read_from_ssl;
-  pending = (int)BIO_pending(impl->network_io);
+  *protected_output_frames_size = static_cast<size_t>(read_from_ssl);
+  pending = static_cast<int>(BIO_pending(impl->network_io));
   GPR_ASSERT(pending >= 0);
-  *still_pending_size = (size_t)pending;
+  *still_pending_size = static_cast<size_t>(pending);
   return TSI_OK;
 }
 
@@ -812,7 +821,8 @@ static tsi_result ssl_protector_unprotect(
   int written_into_ssl = 0;
   size_t output_bytes_size = *unprotected_bytes_size;
   size_t output_bytes_offset = 0;
-  tsi_ssl_frame_protector* impl = (tsi_ssl_frame_protector*)self;
+  tsi_ssl_frame_protector* impl =
+      reinterpret_cast<tsi_ssl_frame_protector*>(self);
 
   /* First, try to read remaining data from ssl. */
   result = do_ssl_read(impl->ssl, unprotected_bytes, unprotected_bytes_size);
@@ -829,13 +839,13 @@ static tsi_result ssl_protector_unprotect(
   /* Then, try to write some data to ssl. */
   GPR_ASSERT(*protected_frames_bytes_size <= INT_MAX);
   written_into_ssl = BIO_write(impl->network_io, protected_frames_bytes,
-                               (int)*protected_frames_bytes_size);
+                               static_cast<int>(*protected_frames_bytes_size));
   if (written_into_ssl < 0) {
     gpr_log(GPR_ERROR, "Sending protected frame to ssl failed with %d",
             written_into_ssl);
     return TSI_INTERNAL_ERROR;
   }
-  *protected_frames_bytes_size = (size_t)written_into_ssl;
+  *protected_frames_bytes_size = static_cast<size_t>(written_into_ssl);
 
   /* Now try to read some data again. */
   result = do_ssl_read(impl->ssl, unprotected_bytes, unprotected_bytes_size);
@@ -847,7 +857,8 @@ static tsi_result ssl_protector_unprotect(
 }
 
 static void ssl_protector_destroy(tsi_frame_protector* self) {
-  tsi_ssl_frame_protector* impl = (tsi_ssl_frame_protector*)self;
+  tsi_ssl_frame_protector* impl =
+      reinterpret_cast<tsi_ssl_frame_protector*>(self);
   if (impl->buffer != nullptr) gpr_free(impl->buffer);
   if (impl->ssl != nullptr) SSL_free(impl->ssl);
   if (impl->network_io != nullptr) BIO_free(impl->network_io);
@@ -907,14 +918,15 @@ static void tsi_ssl_handshaker_factory_init(
 static tsi_result ssl_handshaker_get_bytes_to_send_to_peer(tsi_handshaker* self,
                                                            unsigned char* bytes,
                                                            size_t* bytes_size) {
-  tsi_ssl_handshaker* impl = (tsi_ssl_handshaker*)self;
+  tsi_ssl_handshaker* impl = reinterpret_cast<tsi_ssl_handshaker*>(self);
   int bytes_read_from_ssl = 0;
   if (bytes == nullptr || bytes_size == nullptr || *bytes_size == 0 ||
       *bytes_size > INT_MAX) {
     return TSI_INVALID_ARGUMENT;
   }
   GPR_ASSERT(*bytes_size <= INT_MAX);
-  bytes_read_from_ssl = BIO_read(impl->network_io, bytes, (int)*bytes_size);
+  bytes_read_from_ssl =
+      BIO_read(impl->network_io, bytes, static_cast<int>(*bytes_size));
   if (bytes_read_from_ssl < 0) {
     *bytes_size = 0;
     if (!BIO_should_retry(impl->network_io)) {
@@ -924,12 +936,12 @@ static tsi_result ssl_handshaker_get_bytes_to_send_to_peer(tsi_handshaker* self,
       return TSI_OK;
     }
   }
-  *bytes_size = (size_t)bytes_read_from_ssl;
+  *bytes_size = static_cast<size_t>(bytes_read_from_ssl);
   return BIO_pending(impl->network_io) == 0 ? TSI_OK : TSI_INCOMPLETE_DATA;
 }
 
 static tsi_result ssl_handshaker_get_result(tsi_handshaker* self) {
-  tsi_ssl_handshaker* impl = (tsi_ssl_handshaker*)self;
+  tsi_ssl_handshaker* impl = reinterpret_cast<tsi_ssl_handshaker*>(self);
   if ((impl->result == TSI_HANDSHAKE_IN_PROGRESS) &&
       SSL_is_init_finished(impl->ssl)) {
     impl->result = TSI_OK;
@@ -939,20 +951,20 @@ static tsi_result ssl_handshaker_get_result(tsi_handshaker* self) {
 
 static tsi_result ssl_handshaker_process_bytes_from_peer(
     tsi_handshaker* self, const unsigned char* bytes, size_t* bytes_size) {
-  tsi_ssl_handshaker* impl = (tsi_ssl_handshaker*)self;
+  tsi_ssl_handshaker* impl = reinterpret_cast<tsi_ssl_handshaker*>(self);
   int bytes_written_into_ssl_size = 0;
   if (bytes == nullptr || bytes_size == nullptr || *bytes_size > INT_MAX) {
     return TSI_INVALID_ARGUMENT;
   }
   GPR_ASSERT(*bytes_size <= INT_MAX);
   bytes_written_into_ssl_size =
-      BIO_write(impl->network_io, bytes, (int)*bytes_size);
+      BIO_write(impl->network_io, bytes, static_cast<int>(*bytes_size));
   if (bytes_written_into_ssl_size < 0) {
     gpr_log(GPR_ERROR, "Could not write to memory BIO.");
     impl->result = TSI_INTERNAL_ERROR;
     return impl->result;
   }
-  *bytes_size = (size_t)bytes_written_into_ssl_size;
+  *bytes_size = static_cast<size_t>(bytes_written_into_ssl_size);
 
   if (!tsi_handshaker_is_in_progress(self)) {
     impl->result = TSI_OK;
@@ -988,7 +1000,7 @@ static tsi_result ssl_handshaker_extract_peer(tsi_handshaker* self,
   tsi_result result = TSI_OK;
   const unsigned char* alpn_selected = nullptr;
   unsigned int alpn_selected_len;
-  tsi_ssl_handshaker* impl = (tsi_ssl_handshaker*)self;
+  tsi_ssl_handshaker* impl = reinterpret_cast<tsi_ssl_handshaker*>(self);
   X509* peer_cert = SSL_get_peer_certificate(impl->ssl);
   if (peer_cert != nullptr) {
     result = peer_from_x509(peer_cert, 1, peer);
@@ -1005,14 +1017,15 @@ static tsi_result ssl_handshaker_extract_peer(tsi_handshaker* self,
   }
   if (alpn_selected != nullptr) {
     size_t i;
-    tsi_peer_property* new_properties = (tsi_peer_property*)gpr_zalloc(
-        sizeof(*new_properties) * (peer->property_count + 1));
+    tsi_peer_property* new_properties = static_cast<tsi_peer_property*>(
+        gpr_zalloc(sizeof(*new_properties) * (peer->property_count + 1)));
     for (i = 0; i < peer->property_count; i++) {
       new_properties[i] = peer->properties[i];
     }
     result = tsi_construct_string_peer_property(
-        TSI_SSL_ALPN_SELECTED_PROTOCOL, (const char*)alpn_selected,
-        alpn_selected_len, &new_properties[peer->property_count]);
+        TSI_SSL_ALPN_SELECTED_PROTOCOL,
+        reinterpret_cast<const char*>(alpn_selected), alpn_selected_len,
+        &new_properties[peer->property_count]);
     if (result != TSI_OK) {
       gpr_free(new_properties);
       return result;
@@ -1029,9 +1042,10 @@ static tsi_result ssl_handshaker_create_frame_protector(
     tsi_frame_protector** protector) {
   size_t actual_max_output_protected_frame_size =
       TSI_SSL_MAX_PROTECTED_FRAME_SIZE_UPPER_BOUND;
-  tsi_ssl_handshaker* impl = (tsi_ssl_handshaker*)self;
+  tsi_ssl_handshaker* impl = reinterpret_cast<tsi_ssl_handshaker*>(self);
   tsi_ssl_frame_protector* protector_impl =
-      (tsi_ssl_frame_protector*)gpr_zalloc(sizeof(*protector_impl));
+      static_cast<tsi_ssl_frame_protector*>(
+          gpr_zalloc(sizeof(*protector_impl)));
 
   if (max_output_protected_frame_size != nullptr) {
     if (*max_output_protected_frame_size >
@@ -1048,7 +1062,7 @@ static tsi_result ssl_handshaker_create_frame_protector(
   protector_impl->buffer_size =
       actual_max_output_protected_frame_size - TSI_SSL_MAX_PROTECTION_OVERHEAD;
   protector_impl->buffer =
-      (unsigned char*)gpr_malloc(protector_impl->buffer_size);
+      static_cast<unsigned char*>(gpr_malloc(protector_impl->buffer_size));
   if (protector_impl->buffer == nullptr) {
     gpr_log(GPR_ERROR,
             "Could not allocated buffer for tsi_ssl_frame_protector.");
@@ -1070,7 +1084,7 @@ static tsi_result ssl_handshaker_create_frame_protector(
 }
 
 static void ssl_handshaker_destroy(tsi_handshaker* self) {
-  tsi_ssl_handshaker* impl = (tsi_ssl_handshaker*)self;
+  tsi_ssl_handshaker* impl = reinterpret_cast<tsi_ssl_handshaker*>(self);
   SSL_free(impl->ssl);
   BIO_free(impl->network_io);
   tsi_ssl_handshaker_factory_unref(impl->factory_ref);
@@ -1139,7 +1153,7 @@ static tsi_result create_tsi_ssl_handshaker(SSL_CTX* ctx, int is_client,
     SSL_set_accept_state(ssl);
   }
 
-  impl = (tsi_ssl_handshaker*)gpr_zalloc(sizeof(*impl));
+  impl = static_cast<tsi_ssl_handshaker*>(gpr_zalloc(sizeof(*impl)));
   impl->ssl = ssl;
   impl->network_io = network_io;
   impl->result = TSI_HANDSHAKE_IN_PROGRESS;
@@ -1157,11 +1171,13 @@ static int select_protocol_list(const unsigned char** out,
                                 const unsigned char* server_list,
                                 size_t server_list_len) {
   const unsigned char* client_current = client_list;
-  while ((unsigned int)(client_current - client_list) < client_list_len) {
+  while (static_cast<unsigned int>(client_current - client_list) <
+         client_list_len) {
     unsigned char client_current_len = *(client_current++);
     const unsigned char* server_current = server_list;
     while ((server_current >= server_list) &&
-           (uintptr_t)(server_current - server_list) < server_list_len) {
+           static_cast<uintptr_t>(server_current - server_list) <
+               server_list_len) {
       unsigned char server_current_len = *(server_current++);
       if ((client_current_len == server_current_len) &&
           !memcmp(client_current, server_current, server_current_len)) {
@@ -1195,7 +1211,7 @@ static void tsi_ssl_client_handshaker_factory_destroy(
     tsi_ssl_handshaker_factory* factory) {
   if (factory == nullptr) return;
   tsi_ssl_client_handshaker_factory* self =
-      (tsi_ssl_client_handshaker_factory*)factory;
+      reinterpret_cast<tsi_ssl_client_handshaker_factory*>(factory);
   if (self->ssl_context != nullptr) SSL_CTX_free(self->ssl_context);
   if (self->alpn_protocol_list != nullptr) gpr_free(self->alpn_protocol_list);
   gpr_free(self);
@@ -1207,7 +1223,7 @@ static int client_handshaker_factory_npn_callback(SSL* ssl, unsigned char** out,
                                                   unsigned int inlen,
                                                   void* arg) {
   tsi_ssl_client_handshaker_factory* factory =
-      (tsi_ssl_client_handshaker_factory*)arg;
+      static_cast<tsi_ssl_client_handshaker_factory*>(arg);
   return select_protocol_list((const unsigned char**)out, outlen,
                               factory->alpn_protocol_list,
                               factory->alpn_protocol_list_length, in, inlen);
@@ -1234,7 +1250,7 @@ static void tsi_ssl_server_handshaker_factory_destroy(
     tsi_ssl_handshaker_factory* factory) {
   if (factory == nullptr) return;
   tsi_ssl_server_handshaker_factory* self =
-      (tsi_ssl_server_handshaker_factory*)factory;
+      reinterpret_cast<tsi_ssl_server_handshaker_factory*>(factory);
   size_t i;
   for (i = 0; i < self->ssl_context_count; i++) {
     if (self->ssl_contexts[i] != nullptr) {
@@ -1301,7 +1317,7 @@ static int does_entry_match_name(const char* entry, size_t entry_length,
 static int ssl_server_handshaker_factory_servername_callback(SSL* ssl, int* ap,
                                                              void* arg) {
   tsi_ssl_server_handshaker_factory* impl =
-      (tsi_ssl_server_handshaker_factory*)arg;
+      static_cast<tsi_ssl_server_handshaker_factory*>(arg);
   size_t i = 0;
   const char* servername = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name);
   if (servername == nullptr || strlen(servername) == 0) {
@@ -1324,7 +1340,7 @@ static int server_handshaker_factory_alpn_callback(
     SSL* ssl, const unsigned char** out, unsigned char* outlen,
     const unsigned char* in, unsigned int inlen, void* arg) {
   tsi_ssl_server_handshaker_factory* factory =
-      (tsi_ssl_server_handshaker_factory*)arg;
+      static_cast<tsi_ssl_server_handshaker_factory*>(arg);
   return select_protocol_list(out, outlen, in, inlen,
                               factory->alpn_protocol_list,
                               factory->alpn_protocol_list_length);
@@ -1334,10 +1350,10 @@ static int server_handshaker_factory_alpn_callback(
 static int server_handshaker_factory_npn_advertised_callback(
     SSL* ssl, const unsigned char** out, unsigned int* outlen, void* arg) {
   tsi_ssl_server_handshaker_factory* factory =
-      (tsi_ssl_server_handshaker_factory*)arg;
+      static_cast<tsi_ssl_server_handshaker_factory*>(arg);
   *out = factory->alpn_protocol_list;
   GPR_ASSERT(factory->alpn_protocol_list_length <= UINT_MAX);
-  *outlen = (unsigned int)factory->alpn_protocol_list_length;
+  *outlen = static_cast<unsigned int>(factory->alpn_protocol_list_length);
   return SSL_TLSEXT_ERR_OK;
 }
 
@@ -1367,7 +1383,8 @@ tsi_result tsi_create_ssl_client_handshaker_factory(
     return TSI_INVALID_ARGUMENT;
   }
 
-  impl = (tsi_ssl_client_handshaker_factory*)gpr_zalloc(sizeof(*impl));
+  impl = static_cast<tsi_ssl_client_handshaker_factory*>(
+      gpr_zalloc(sizeof(*impl)));
   tsi_ssl_handshaker_factory_init(&impl->base);
   impl->base.vtable = &client_handshaker_factory_vtable;
 
@@ -1397,7 +1414,7 @@ tsi_result tsi_create_ssl_client_handshaker_factory(
       GPR_ASSERT(impl->alpn_protocol_list_length < UINT_MAX);
       if (SSL_CTX_set_alpn_protos(
               ssl_context, impl->alpn_protocol_list,
-              (unsigned int)impl->alpn_protocol_list_length)) {
+              static_cast<unsigned int>(impl->alpn_protocol_list_length))) {
         gpr_log(GPR_ERROR, "Could not set alpn protocol list to context.");
         result = TSI_INVALID_ARGUMENT;
         break;
@@ -1452,14 +1469,15 @@ tsi_result tsi_create_ssl_server_handshaker_factory_ex(
     return TSI_INVALID_ARGUMENT;
   }
 
-  impl = (tsi_ssl_server_handshaker_factory*)gpr_zalloc(sizeof(*impl));
+  impl = static_cast<tsi_ssl_server_handshaker_factory*>(
+      gpr_zalloc(sizeof(*impl)));
   tsi_ssl_handshaker_factory_init(&impl->base);
   impl->base.vtable = &server_handshaker_factory_vtable;
 
   impl->ssl_contexts =
-      (SSL_CTX**)gpr_zalloc(num_key_cert_pairs * sizeof(SSL_CTX*));
+      static_cast<SSL_CTX**>(gpr_zalloc(num_key_cert_pairs * sizeof(SSL_CTX*)));
   impl->ssl_context_x509_subject_names =
-      (tsi_peer*)gpr_zalloc(num_key_cert_pairs * sizeof(tsi_peer));
+      static_cast<tsi_peer*>(gpr_zalloc(num_key_cert_pairs * sizeof(tsi_peer)));
   if (impl->ssl_contexts == nullptr ||
       impl->ssl_context_x509_subject_names == nullptr) {
     tsi_ssl_handshaker_factory_unref(&impl->base);
diff --git a/src/core/tsi/transport_security.cc b/src/core/tsi/transport_security.cc
index 5abd2f0f68..0c8e3e9dcc 100644
--- a/src/core/tsi/transport_security.cc
+++ b/src/core/tsi/transport_security.cc
@@ -288,7 +288,7 @@ tsi_result tsi_construct_allocated_string_peer_property(
   *property = tsi_init_peer_property();
   if (name != nullptr) property->name = gpr_strdup(name);
   if (value_length > 0) {
-    property->value.data = (char*)gpr_zalloc(value_length);
+    property->value.data = static_cast<char*>(gpr_zalloc(value_length));
     property->value.length = value_length;
   }
   return TSI_OK;
@@ -316,8 +316,8 @@ tsi_result tsi_construct_string_peer_property(const char* name,
 tsi_result tsi_construct_peer(size_t property_count, tsi_peer* peer) {
   memset(peer, 0, sizeof(tsi_peer));
   if (property_count > 0) {
-    peer->properties = (tsi_peer_property*)gpr_zalloc(
-        property_count * sizeof(tsi_peer_property));
+    peer->properties = static_cast<tsi_peer_property*>(
+        gpr_zalloc(property_count * sizeof(tsi_peer_property)));
     peer->property_count = property_count;
   }
   return TSI_OK;
diff --git a/src/core/tsi/transport_security_adapter.cc b/src/core/tsi/transport_security_adapter.cc
index 56dec55494..5f094b3201 100644
--- a/src/core/tsi/transport_security_adapter.cc
+++ b/src/core/tsi/transport_security_adapter.cc
@@ -59,7 +59,8 @@ static tsi_result adapter_result_get_unused_bytes(
 }
 
 static void adapter_result_destroy(tsi_handshaker_result* self) {
-  tsi_adapter_handshaker_result* impl = (tsi_adapter_handshaker_result*)self;
+  tsi_adapter_handshaker_result* impl =
+      reinterpret_cast<tsi_adapter_handshaker_result*>(self);
   tsi_handshaker_destroy(impl->wrapped);
   gpr_free(impl->unused_bytes);
   gpr_free(self);
@@ -82,12 +83,13 @@ static tsi_result tsi_adapter_create_handshaker_result(
     return TSI_INVALID_ARGUMENT;
   }
   tsi_adapter_handshaker_result* impl =
-      (tsi_adapter_handshaker_result*)gpr_zalloc(sizeof(*impl));
+      static_cast<tsi_adapter_handshaker_result*>(gpr_zalloc(sizeof(*impl)));
   impl->base.vtable = &result_vtable;
   impl->wrapped = wrapped;
   impl->unused_bytes_size = unused_bytes_size;
   if (unused_bytes_size > 0) {
-    impl->unused_bytes = (unsigned char*)gpr_malloc(unused_bytes_size);
+    impl->unused_bytes =
+        static_cast<unsigned char*>(gpr_malloc(unused_bytes_size));
     memcpy(impl->unused_bytes, unused_bytes, unused_bytes_size);
   } else {
     impl->unused_bytes = nullptr;
@@ -137,7 +139,8 @@ static tsi_result adapter_create_frame_protector(
 }
 
 static void adapter_destroy(tsi_handshaker* self) {
-  tsi_adapter_handshaker* impl = (tsi_adapter_handshaker*)self;
+  tsi_adapter_handshaker* impl =
+      reinterpret_cast<tsi_adapter_handshaker*>(self);
   tsi_handshaker_destroy(impl->wrapped);
   gpr_free(impl->adapter_buffer);
   gpr_free(self);
@@ -156,7 +159,8 @@ static tsi_result adapter_next(
   }
 
   /* If there are received bytes, process them first.  */
-  tsi_adapter_handshaker* impl = (tsi_adapter_handshaker*)self;
+  tsi_adapter_handshaker* impl =
+      reinterpret_cast<tsi_adapter_handshaker*>(self);
   tsi_result status = TSI_OK;
   size_t bytes_consumed = received_bytes_size;
   if (received_bytes_size > 0) {
@@ -174,8 +178,8 @@ static tsi_result adapter_next(
     offset += to_send_size;
     if (status == TSI_INCOMPLETE_DATA) {
       impl->adapter_buffer_size *= 2;
-      impl->adapter_buffer = (unsigned char*)gpr_realloc(
-          impl->adapter_buffer, impl->adapter_buffer_size);
+      impl->adapter_buffer = static_cast<unsigned char*>(
+          gpr_realloc(impl->adapter_buffer, impl->adapter_buffer_size));
     }
   } while (status == TSI_INCOMPLETE_DATA);
   if (status != TSI_OK) return status;
@@ -212,16 +216,18 @@ static const tsi_handshaker_vtable handshaker_vtable = {
 tsi_handshaker* tsi_create_adapter_handshaker(tsi_handshaker* wrapped) {
   GPR_ASSERT(wrapped != nullptr);
   tsi_adapter_handshaker* impl =
-      (tsi_adapter_handshaker*)gpr_zalloc(sizeof(*impl));
+      static_cast<tsi_adapter_handshaker*>(gpr_zalloc(sizeof(*impl)));
   impl->base.vtable = &handshaker_vtable;
   impl->wrapped = wrapped;
   impl->adapter_buffer_size = TSI_ADAPTER_INITIAL_BUFFER_SIZE;
-  impl->adapter_buffer = (unsigned char*)gpr_malloc(impl->adapter_buffer_size);
+  impl->adapter_buffer =
+      static_cast<unsigned char*>(gpr_malloc(impl->adapter_buffer_size));
   return &impl->base;
 }
 
 tsi_handshaker* tsi_adapter_handshaker_get_wrapped(tsi_handshaker* adapter) {
   if (adapter == nullptr) return nullptr;
-  tsi_adapter_handshaker* impl = (tsi_adapter_handshaker*)adapter;
+  tsi_adapter_handshaker* impl =
+      reinterpret_cast<tsi_adapter_handshaker*>(adapter);
   return impl->wrapped;
 }
diff --git a/src/cpp/common/channel_filter.cc b/src/cpp/common/channel_filter.cc
index cbe2a209f5..874f31b639 100644
--- a/src/cpp/common/channel_filter.cc
+++ b/src/cpp/common/channel_filter.cc
@@ -72,7 +72,7 @@ std::vector<FilterRecord>* channel_filters;
 namespace {
 
 bool MaybeAddFilter(grpc_channel_stack_builder* builder, void* arg) {
-  const FilterRecord& filter = *(FilterRecord*)arg;
+  const FilterRecord& filter = *static_cast<FilterRecord*>(arg);
   if (filter.include_filter) {
     const grpc_channel_args* args =
         grpc_channel_stack_builder_get_channel_arguments(builder);
diff --git a/src/cpp/common/channel_filter.h b/src/cpp/common/channel_filter.h
index a1f42c0b32..a1d22085bf 100644
--- a/src/cpp/common/channel_filter.h
+++ b/src/cpp/common/channel_filter.h
@@ -201,7 +201,8 @@ class TransportStreamOpBatch {
   }
 
   census_context* get_census_context() const {
-    return (census_context*)op_->payload->context[GRPC_CONTEXT_TRACING].value;
+    return static_cast<census_context*>(
+        op_->payload->context[GRPC_CONTEXT_TRACING].value);
   }
 
  private:
diff --git a/src/cpp/util/time_cc.cc b/src/cpp/util/time_cc.cc
index 3b6e075929..d475c25a5b 100644
--- a/src/cpp/util/time_cc.cc
+++ b/src/cpp/util/time_cc.cc
@@ -39,8 +39,8 @@ void Timepoint2Timespec(const system_clock::time_point& from,
     return;
   }
   nanoseconds nsecs = duration_cast<nanoseconds>(deadline - secs);
-  to->tv_sec = (int64_t)secs.count();
-  to->tv_nsec = (int32_t)nsecs.count();
+  to->tv_sec = static_cast<int64_t>(secs.count());
+  to->tv_nsec = static_cast<int32_t>(nsecs.count());
   to->clock_type = GPR_CLOCK_REALTIME;
 }
 
@@ -55,8 +55,8 @@ void TimepointHR2Timespec(const high_resolution_clock::time_point& from,
     return;
   }
   nanoseconds nsecs = duration_cast<nanoseconds>(deadline - secs);
-  to->tv_sec = (int64_t)secs.count();
-  to->tv_nsec = (int32_t)nsecs.count();
+  to->tv_sec = static_cast<int64_t>(secs.count());
+  to->tv_nsec = static_cast<int32_t>(nsecs.count());
   to->clock_type = GPR_CLOCK_REALTIME;
 }