diff --git a/CHANGELOG.md b/CHANGELOG.md
index ff421e99bb3a..c8d963537e9a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,32 @@
 
 ## Unreleased
 
+### Important Changes
+
+- **ref(react, browser): make `@sentry/react` tree-shakeable by default ([#22168](https://github.com/getsentry/sentry-javascript/pull/22168))**
+
+  The `@sentry/react` root entry no longer star-exports the full `@sentry/browser` surface. Optional/heavy features
+  (Session Replay, Feedback, AI instrumenters, feature-flag integrations, browser profiling, …) and React
+  Router/Redux helpers are off the root export list so bundlers that materialize a dynamic `import('@sentry/react')`
+  namespace (e.g. Rolldown when destructuring) do not pull them into the critical path.
+
+  **Migration** — import optional browser APIs from `@sentry/browser`, `@sentry/react/optional-browser-api`, or a
+  dedicated package; import router/Redux helpers from package subpaths:
+
+  ```ts
+  // Before
+  import { replayIntegration, tanstackRouterBrowserTracingIntegration, createReduxEnhancer } from '@sentry/react';
+
+  // After
+  import { replayIntegration } from '@sentry/browser'; // or @sentry/react/optional-browser-api / @sentry/replay
+  import { tanstackRouterBrowserTracingIntegration } from '@sentry/react/tanstackrouter';
+  import { createReduxEnhancer } from '@sentry/react/redux';
+  ```
+
+  Framework SDKs (`@sentry/nextjs`, `@sentry/gatsby`, `@sentry/remix`, `@sentry/tanstackstart-react`)
+  re-export `optional-browser-api` (and `createReduxEnhancer` on nextjs/gatsby/remix) so
+  `import * as Sentry from '@sentry/…'` keeps the previous surface for those symbols.
+
 - "You miss 100 percent of the chances you don't take. — Wayne Gretzky" — Michael Scott
 
 Work in this release was contributed by @martijnwalraven. Thank you for your contribution!
diff --git a/dev-packages/e2e-tests/test-applications/lighthouse-react/src/main.tsx b/dev-packages/e2e-tests/test-applications/lighthouse-react/src/main.tsx
index 352c53c7208b..634ab96c4459 100644
--- a/dev-packages/e2e-tests/test-applications/lighthouse-react/src/main.tsx
+++ b/dev-packages/e2e-tests/test-applications/lighthouse-react/src/main.tsx
@@ -1,4 +1,5 @@
 import * as Sentry from '@sentry/react';
+import { replayIntegration } from '@sentry/react/optional-browser-api';
 import { createRoot } from 'react-dom/client';
 import App from './App';
 
@@ -19,7 +20,7 @@ if (import.meta.env.MODE === 'tracing-replay') {
     dsn: import.meta.env.VITE_E2E_TEST_DSN as string | undefined,
     release: 'lighthouse-fixture',
     environment: 'qa',
-    integrations: [Sentry.browserTracingIntegration(), Sentry.replayIntegration()],
+    integrations: [Sentry.browserTracingIntegration(), replayIntegration()],
     tracesSampleRate: 1.0,
     replaysSessionSampleRate: 1.0,
     replaysOnErrorSampleRate: 1.0,
diff --git a/dev-packages/e2e-tests/test-applications/react-17/src/index.tsx b/dev-packages/e2e-tests/test-applications/react-17/src/index.tsx
index ca6918c46106..11b72fbd7c57 100644
--- a/dev-packages/e2e-tests/test-applications/react-17/src/index.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-17/src/index.tsx
@@ -1,4 +1,6 @@
 import * as Sentry from '@sentry/react';
+import { replayIntegration } from '@sentry/react/optional-browser-api';
+import { reactRouterV6BrowserTracingIntegration, withSentryReactRouterV6Routing } from '@sentry/react/reactrouterv6';
 import React from 'react';
 import ReactDOM from 'react-dom';
 import {
@@ -13,13 +15,13 @@ import {
 import Index from './pages/Index';
 import User from './pages/User';
 
-const replay = Sentry.replayIntegration();
+const replay = replayIntegration();
 
 Sentry.init({
   environment: 'qa', // dynamic sampling bias to keep transactions
   dsn: process.env.REACT_APP_E2E_TEST_DSN,
   integrations: [
-    Sentry.reactRouterV6BrowserTracingIntegration({
+    reactRouterV6BrowserTracingIntegration({
       useEffect: React.useEffect,
       useLocation,
       useNavigationType,
@@ -41,7 +43,7 @@ Sentry.init({
   dataCollection: { userInfo: true },
 });
 
-const SentryRoutes = Sentry.withSentryReactRouterV6Routing(Routes);
+const SentryRoutes = withSentryReactRouterV6Routing(Routes);
 
 function App() {
   return (
diff --git a/dev-packages/e2e-tests/test-applications/react-create-browser-router/src/index.tsx b/dev-packages/e2e-tests/test-applications/react-create-browser-router/src/index.tsx
index c7ad16eebcf7..b5d78fd69af8 100644
--- a/dev-packages/e2e-tests/test-applications/react-create-browser-router/src/index.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-create-browser-router/src/index.tsx
@@ -1,4 +1,6 @@
 import * as Sentry from '@sentry/react';
+import { replayIntegration } from '@sentry/react/optional-browser-api';
+import { reactRouterV6BrowserTracingIntegration, wrapCreateBrowserRouterV6 } from '@sentry/react/reactrouterv6';
 import React, { lazy, Suspense } from 'react';
 import ReactDOM from 'react-dom/client';
 import {
@@ -12,13 +14,13 @@ import {
 import Index from './pages/Index';
 import User from './pages/User';
 
-const replay = Sentry.replayIntegration();
+const replay = replayIntegration();
 
 Sentry.init({
   // environment: 'qa', // dynamic sampling bias to keep transactions
   dsn: process.env.REACT_APP_E2E_TEST_DSN,
   integrations: [
-    Sentry.reactRouterV6BrowserTracingIntegration({
+    reactRouterV6BrowserTracingIntegration({
       useEffect: React.useEffect,
       useLocation,
       useNavigationType,
@@ -41,7 +43,7 @@ Sentry.init({
   debug: !!process.env.DEBUG,
 });
 
-const sentryCreateBrowserRouter = Sentry.wrapCreateBrowserRouterV6(createBrowserRouter);
+const sentryCreateBrowserRouter = wrapCreateBrowserRouterV6(createBrowserRouter);
 const LazyLoadedUser = lazy(() => import('./pages/LazyLoadedUser'));
 
 const router = sentryCreateBrowserRouter(
diff --git a/dev-packages/e2e-tests/test-applications/react-create-browser-router/src/pages/LazyLoadedInnerRoute.tsx b/dev-packages/e2e-tests/test-applications/react-create-browser-router/src/pages/LazyLoadedInnerRoute.tsx
index 915cb720974a..a9a433d30975 100644
--- a/dev-packages/e2e-tests/test-applications/react-create-browser-router/src/pages/LazyLoadedInnerRoute.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-create-browser-router/src/pages/LazyLoadedInnerRoute.tsx
@@ -1,8 +1,8 @@
-import * as Sentry from '@sentry/react';
+import { withSentryReactRouterV6Routing } from '@sentry/react/reactrouterv6';
 import * as React from 'react';
 import { Route, Routes } from 'react-router-dom';
 
-const SentryRoutes = Sentry.withSentryReactRouterV6Routing(Routes);
+const SentryRoutes = withSentryReactRouterV6Routing(Routes);
 
 const InnerRoute = () => (
   <SentryRoutes>
diff --git a/dev-packages/e2e-tests/test-applications/react-create-browser-router/src/pages/LazyLoadedUser.tsx b/dev-packages/e2e-tests/test-applications/react-create-browser-router/src/pages/LazyLoadedUser.tsx
index 636f99d9c8cb..41c8ec6eb36a 100644
--- a/dev-packages/e2e-tests/test-applications/react-create-browser-router/src/pages/LazyLoadedUser.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-create-browser-router/src/pages/LazyLoadedUser.tsx
@@ -1,8 +1,8 @@
-import * as Sentry from '@sentry/react';
+import { withSentryReactRouterV6Routing } from '@sentry/react/reactrouterv6';
 import * as React from 'react';
 import { Route, Routes } from 'react-router-dom';
 
-const SentryRoutes = Sentry.withSentryReactRouterV6Routing(Routes);
+const SentryRoutes = withSentryReactRouterV6Routing(Routes);
 const InnerRoute = React.lazy(() => import('./LazyLoadedInnerRoute'));
 
 const LazyLoadedUser = () => {
diff --git a/dev-packages/e2e-tests/test-applications/react-create-hash-router/src/index.tsx b/dev-packages/e2e-tests/test-applications/react-create-hash-router/src/index.tsx
index 86de5f20378d..a08a80ef17f5 100644
--- a/dev-packages/e2e-tests/test-applications/react-create-hash-router/src/index.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-create-hash-router/src/index.tsx
@@ -1,4 +1,6 @@
 import * as Sentry from '@sentry/react';
+import { replayIntegration } from '@sentry/react/optional-browser-api';
+import { reactRouterV6BrowserTracingIntegration, wrapCreateBrowserRouterV6 } from '@sentry/react/reactrouterv6';
 import React from 'react';
 import ReactDOM from 'react-dom/client';
 import {
@@ -13,13 +15,13 @@ import Index from './pages/Index';
 import User from './pages/User';
 import Group from './pages/Group';
 
-const replay = Sentry.replayIntegration();
+const replay = replayIntegration();
 
 Sentry.init({
   // environment: 'qa', // dynamic sampling bias to keep transactions
   dsn: process.env.REACT_APP_E2E_TEST_DSN,
   integrations: [
-    Sentry.reactRouterV6BrowserTracingIntegration({
+    reactRouterV6BrowserTracingIntegration({
       useEffect: React.useEffect,
       useLocation,
       useNavigationType,
@@ -42,7 +44,7 @@ Sentry.init({
   debug: !!process.env.DEBUG,
 });
 
-const sentryCreateHashRouter = Sentry.wrapCreateBrowserRouterV6(createHashRouter);
+const sentryCreateHashRouter = wrapCreateBrowserRouterV6(createHashRouter);
 
 const router = sentryCreateHashRouter([
   {
diff --git a/dev-packages/e2e-tests/test-applications/react-create-memory-router/src/index.tsx b/dev-packages/e2e-tests/test-applications/react-create-memory-router/src/index.tsx
index f71572f9dc1f..5cdb770d4525 100644
--- a/dev-packages/e2e-tests/test-applications/react-create-memory-router/src/index.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-create-memory-router/src/index.tsx
@@ -1,4 +1,6 @@
 import * as Sentry from '@sentry/react';
+import { replayIntegration } from '@sentry/react/optional-browser-api';
+import { reactRouterV6BrowserTracingIntegration, wrapCreateMemoryRouterV6 } from '@sentry/react/reactrouterv6';
 import React from 'react';
 import ReactDOM from 'react-dom/client';
 import {
@@ -12,13 +14,13 @@ import {
 import Index from './pages/Index';
 import User from './pages/User';
 
-const replay = Sentry.replayIntegration();
+const replay = replayIntegration();
 
 Sentry.init({
   // environment: 'qa', // dynamic sampling bias to keep transactions
   dsn: process.env.REACT_APP_E2E_TEST_DSN,
   integrations: [
-    Sentry.reactRouterV6BrowserTracingIntegration({
+    reactRouterV6BrowserTracingIntegration({
       useEffect: React.useEffect,
       useLocation,
       useNavigationType,
@@ -41,7 +43,7 @@ Sentry.init({
   debug: !!process.env.DEBUG,
 });
 
-const sentryCreateMemoryRouter = Sentry.wrapCreateMemoryRouterV6(createMemoryRouter);
+const sentryCreateMemoryRouter = wrapCreateMemoryRouterV6(createMemoryRouter);
 
 const router = sentryCreateMemoryRouter(
   [
diff --git a/dev-packages/e2e-tests/test-applications/react-router-5/src/index.tsx b/dev-packages/e2e-tests/test-applications/react-router-5/src/index.tsx
index cc9b307e620a..cfbfadd52d19 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-5/src/index.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-5/src/index.tsx
@@ -1,4 +1,6 @@
 import * as Sentry from '@sentry/react';
+import { replayIntegration } from '@sentry/react/optional-browser-api';
+import { reactRouterV5BrowserTracingIntegration, withSentryRouting } from '@sentry/react/reactrouter';
 import { createBrowserHistory } from 'history';
 import React from 'react';
 import ReactDOM from 'react-dom/client';
@@ -6,7 +8,7 @@ import { Route, Router, Switch } from 'react-router-dom';
 import Index from './pages/Index';
 import User from './pages/User';
 
-const replay = Sentry.replayIntegration();
+const replay = replayIntegration();
 
 const history = createBrowserHistory();
 
@@ -15,7 +17,7 @@ Sentry.init({
   dsn:
     process.env.REACT_APP_E2E_TEST_DSN ||
     'https://3b6c388182fb435097f41d181be2b2ba@o4504321058471936.ingest.sentry.io/4504321066008576',
-  integrations: [Sentry.reactRouterV5BrowserTracingIntegration({ history }), replay],
+  integrations: [reactRouterV5BrowserTracingIntegration({ history }), replay],
   // We recommend adjusting this value in production, or using tracesSampler
   // for finer control
   tracesSampleRate: 1.0,
@@ -28,7 +30,7 @@ Sentry.init({
 });
 
 // Create Custom Sentry Route component
-export const SentryRoute = Sentry.withSentryRouting(Route);
+export const SentryRoute = withSentryRouting(Route);
 
 const root = ReactDOM.createRoot(document.getElementById('root') as HTMLElement);
 root.render(
diff --git a/dev-packages/e2e-tests/test-applications/react-router-6-descendant-routes/src/index.tsx b/dev-packages/e2e-tests/test-applications/react-router-6-descendant-routes/src/index.tsx
index 581014169a78..2b994012c030 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-6-descendant-routes/src/index.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-6-descendant-routes/src/index.tsx
@@ -1,4 +1,6 @@
 import * as Sentry from '@sentry/react';
+import { replayIntegration } from '@sentry/react/optional-browser-api';
+import { reactRouterV6BrowserTracingIntegration, withSentryReactRouterV6Routing } from '@sentry/react/reactrouterv6';
 import React from 'react';
 import ReactDOM from 'react-dom/client';
 import {
@@ -13,13 +15,13 @@ import {
 } from 'react-router-dom';
 import Index from './pages/Index';
 
-const replay = Sentry.replayIntegration();
+const replay = replayIntegration();
 
 Sentry.init({
   environment: 'qa', // dynamic sampling bias to keep transactions
   dsn: process.env.REACT_APP_E2E_TEST_DSN,
   integrations: [
-    Sentry.reactRouterV6BrowserTracingIntegration({
+    reactRouterV6BrowserTracingIntegration({
       useEffect: React.useEffect,
       useLocation,
       useNavigationType,
@@ -41,7 +43,7 @@ Sentry.init({
   tunnel: 'http://localhost:3031',
 });
 
-const SentryRoutes = Sentry.withSentryReactRouterV6Routing(Routes);
+const SentryRoutes = withSentryReactRouterV6Routing(Routes);
 
 const DetailsRoutes = () => (
   <SentryRoutes>
diff --git a/dev-packages/e2e-tests/test-applications/react-router-6-use-routes/src/index.tsx b/dev-packages/e2e-tests/test-applications/react-router-6-use-routes/src/index.tsx
index 0ac33b9f6c5f..c4b9fef54d9e 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-6-use-routes/src/index.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-6-use-routes/src/index.tsx
@@ -1,4 +1,6 @@
 import * as Sentry from '@sentry/react';
+import { replayIntegration } from '@sentry/react/optional-browser-api';
+import { reactRouterBrowserTracingIntegration, wrapUseRoutes } from '@sentry/react/reactrouter.compat';
 import React from 'react';
 import ReactDOM from 'react-dom/client';
 import {
@@ -12,13 +14,13 @@ import {
 import Index from './pages/Index';
 import User from './pages/User';
 
-const replay = Sentry.replayIntegration();
+const replay = replayIntegration();
 
 Sentry.init({
   environment: 'qa', // dynamic sampling bias to keep transactions
   dsn: process.env.REACT_APP_E2E_TEST_DSN,
   integrations: [
-    Sentry.reactRouterBrowserTracingIntegration({
+    reactRouterBrowserTracingIntegration({
       useEffect: React.useEffect,
       useLocation,
       useNavigationType,
@@ -39,7 +41,7 @@ Sentry.init({
   tunnel: 'http://localhost:3031', // proxy server
 });
 
-const useSentryRoutes = Sentry.wrapUseRoutes(useRoutes);
+const useSentryRoutes = wrapUseRoutes(useRoutes);
 
 function App() {
   return useSentryRoutes([
diff --git a/dev-packages/e2e-tests/test-applications/react-router-6/src/index.tsx b/dev-packages/e2e-tests/test-applications/react-router-6/src/index.tsx
index 1430a44935b6..31009d222639 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-6/src/index.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-6/src/index.tsx
@@ -1,4 +1,6 @@
 import * as Sentry from '@sentry/react';
+import { replayIntegration } from '@sentry/react/optional-browser-api';
+import { reactRouterV6BrowserTracingIntegration, withSentryReactRouterV6Routing } from '@sentry/react/reactrouterv6';
 import React from 'react';
 import ReactDOM from 'react-dom/client';
 import {
@@ -15,13 +17,13 @@ import Products from './pages/Products';
 import SSE from './pages/SSE';
 import User from './pages/User';
 
-const replay = Sentry.replayIntegration();
+const replay = replayIntegration();
 
 Sentry.init({
   environment: 'qa', // dynamic sampling bias to keep transactions
   dsn: process.env.REACT_APP_E2E_TEST_DSN,
   integrations: [
-    Sentry.reactRouterV6BrowserTracingIntegration({
+    reactRouterV6BrowserTracingIntegration({
       useEffect: React.useEffect,
       useLocation,
       useNavigationType,
@@ -44,7 +46,7 @@ Sentry.init({
   dataCollection: { userInfo: true },
 });
 
-const SentryRoutes = Sentry.withSentryReactRouterV6Routing(Routes);
+const SentryRoutes = withSentryReactRouterV6Routing(Routes);
 
 const root = ReactDOM.createRoot(document.getElementById('root') as HTMLElement);
 root.render(
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-cross-usage/src/index.tsx b/dev-packages/e2e-tests/test-applications/react-router-7-cross-usage/src/index.tsx
index 5c381487587f..be2849dfac12 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-cross-usage/src/index.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-cross-usage/src/index.tsx
@@ -1,4 +1,11 @@
 import * as Sentry from '@sentry/react';
+import { replayIntegration } from '@sentry/react/optional-browser-api';
+import {
+  reactRouterBrowserTracingIntegration,
+  wrapReactRouterRouting,
+  wrapUseRoutes,
+  wrapCreateBrowserRouter,
+} from '@sentry/react/reactrouter.compat';
 import React from 'react';
 import ReactDOM from 'react-dom/client';
 import {
@@ -15,13 +22,13 @@ import {
 } from 'react-router-dom';
 import Index from './pages/Index';
 
-const replay = Sentry.replayIntegration();
+const replay = replayIntegration();
 
 Sentry.init({
   environment: 'qa', // dynamic sampling bias to keep transactions
   dsn: process.env.REACT_APP_E2E_TEST_DSN,
   integrations: [
-    Sentry.reactRouterBrowserTracingIntegration({
+    reactRouterBrowserTracingIntegration({
       useEffect: React.useEffect,
       useLocation,
       useNavigationType,
@@ -43,9 +50,9 @@ Sentry.init({
   tunnel: 'http://localhost:3031',
 });
 
-const SentryRoutes = Sentry.wrapReactRouterRouting(Routes);
-const sentryUseRoutes = Sentry.wrapUseRoutes(useRoutes);
-const sentryCreateBrowserRouter = Sentry.wrapCreateBrowserRouter(createBrowserRouter);
+const SentryRoutes = wrapReactRouterRouting(Routes);
+const sentryUseRoutes = wrapUseRoutes(useRoutes);
+const sentryCreateBrowserRouter = wrapCreateBrowserRouter(createBrowserRouter);
 
 const DetailsRoutes = () =>
   sentryUseRoutes([
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-lazy-routes/src/index.tsx b/dev-packages/e2e-tests/test-applications/react-router-7-lazy-routes/src/index.tsx
index 4d47ddbf58bf..2dacb4c335ab 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-lazy-routes/src/index.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-lazy-routes/src/index.tsx
@@ -1,4 +1,5 @@
 import * as Sentry from '@sentry/react';
+import { reactRouterV7BrowserTracingIntegration, wrapCreateBrowserRouterV7 } from '@sentry/react/reactrouterv7';
 import React from 'react';
 import ReactDOM from 'react-dom/client';
 import {
@@ -81,7 +82,7 @@ Sentry.init({
   environment: 'qa', // dynamic sampling bias to keep transactions
   dsn: process.env.REACT_APP_E2E_TEST_DSN,
   integrations: [
-    Sentry.reactRouterV7BrowserTracingIntegration({
+    reactRouterV7BrowserTracingIntegration({
       useEffect: React.useEffect,
       useLocation,
       useNavigationType,
@@ -102,7 +103,7 @@ Sentry.init({
   tunnel: 'http://localhost:3031',
 });
 
-const sentryCreateBrowserRouter = Sentry.wrapCreateBrowserRouterV7(createBrowserRouter);
+const sentryCreateBrowserRouter = wrapCreateBrowserRouterV7(createBrowserRouter);
 
 const router = sentryCreateBrowserRouter(
   [
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-spa-streaming/src/main.tsx b/dev-packages/e2e-tests/test-applications/react-router-7-spa-streaming/src/main.tsx
index e55bd5f50bf3..cf26f5c09797 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-spa-streaming/src/main.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-spa-streaming/src/main.tsx
@@ -1,4 +1,6 @@
 import * as Sentry from '@sentry/react';
+import { replayIntegration, spanStreamingIntegration } from '@sentry/react/optional-browser-api';
+import { reactRouterV7BrowserTracingIntegration, withSentryReactRouterV7Routing } from '@sentry/react/reactrouterv7';
 import React from 'react';
 import ReactDOM from 'react-dom/client';
 import {
@@ -14,13 +16,13 @@ import Index from './pages/Index';
 import SSE from './pages/SSE';
 import User from './pages/User';
 
-const replay = Sentry.replayIntegration();
+const replay = replayIntegration();
 
 Sentry.init({
   environment: 'qa', // dynamic sampling bias to keep transactions
   dsn: import.meta.env.PUBLIC_E2E_TEST_DSN,
   integrations: [
-    Sentry.reactRouterV7BrowserTracingIntegration({
+    reactRouterV7BrowserTracingIntegration({
       useEffect: React.useEffect,
       useLocation,
       useNavigationType,
@@ -28,7 +30,7 @@ Sentry.init({
       matchRoutes,
       trackFetchStreamPerformance: true,
     }),
-    Sentry.spanStreamingIntegration(),
+    spanStreamingIntegration(),
     replay,
   ],
   // We recommend adjusting this value in production, or using tracesSampler
@@ -43,7 +45,7 @@ Sentry.init({
   dataCollection: { userInfo: true },
 });
 
-const SentryRoutes = Sentry.withSentryReactRouterV7Routing(Routes);
+const SentryRoutes = withSentryReactRouterV7Routing(Routes);
 
 const root = ReactDOM.createRoot(document.getElementById('root') as HTMLElement);
 root.render(
diff --git a/dev-packages/e2e-tests/test-applications/react-router-7-spa/src/main.tsx b/dev-packages/e2e-tests/test-applications/react-router-7-spa/src/main.tsx
index 202de7be19b4..598ffc692d98 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-7-spa/src/main.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-7-spa/src/main.tsx
@@ -1,4 +1,6 @@
 import * as Sentry from '@sentry/react';
+import { replayIntegration } from '@sentry/react/optional-browser-api';
+import { reactRouterBrowserTracingIntegration, wrapReactRouterRouting } from '@sentry/react/reactrouter.compat';
 import React from 'react';
 import ReactDOM from 'react-dom/client';
 import {
@@ -15,13 +17,13 @@ import Products from './pages/Products';
 import SSE from './pages/SSE';
 import User from './pages/User';
 
-const replay = Sentry.replayIntegration();
+const replay = replayIntegration();
 
 Sentry.init({
   environment: 'qa', // dynamic sampling bias to keep transactions
   dsn: import.meta.env.PUBLIC_E2E_TEST_DSN,
   integrations: [
-    Sentry.reactRouterBrowserTracingIntegration({
+    reactRouterBrowserTracingIntegration({
       useEffect: React.useEffect,
       useLocation,
       useNavigationType,
@@ -43,7 +45,7 @@ Sentry.init({
   dataCollection: { userInfo: true },
 });
 
-const SentryRoutes = Sentry.wrapReactRouterRouting(Routes);
+const SentryRoutes = wrapReactRouterRouting(Routes);
 
 const root = ReactDOM.createRoot(document.getElementById('root') as HTMLElement);
 root.render(
diff --git a/dev-packages/e2e-tests/test-applications/react-router-8-cross-usage/src/index.tsx b/dev-packages/e2e-tests/test-applications/react-router-8-cross-usage/src/index.tsx
index 46be7181b87c..c7888e90be73 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-8-cross-usage/src/index.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-8-cross-usage/src/index.tsx
@@ -1,4 +1,11 @@
 import * as Sentry from '@sentry/react';
+import { replayIntegration } from '@sentry/react/optional-browser-api';
+import {
+  reactRouterBrowserTracingIntegration,
+  wrapReactRouterRouting,
+  wrapUseRoutes,
+  wrapCreateBrowserRouter,
+} from '@sentry/react/reactrouter.compat';
 import React from 'react';
 import ReactDOM from 'react-dom/client';
 import {
@@ -15,13 +22,13 @@ import {
 } from 'react-router';
 import Index from './pages/Index';
 
-const replay = Sentry.replayIntegration();
+const replay = replayIntegration();
 
 Sentry.init({
   environment: 'qa', // dynamic sampling bias to keep transactions
   dsn: process.env.REACT_APP_E2E_TEST_DSN,
   integrations: [
-    Sentry.reactRouterBrowserTracingIntegration({
+    reactRouterBrowserTracingIntegration({
       useEffect: React.useEffect,
       useLocation,
       useNavigationType,
@@ -43,9 +50,9 @@ Sentry.init({
   tunnel: 'http://localhost:3031',
 });
 
-const SentryRoutes = Sentry.wrapReactRouterRouting(Routes);
-const sentryUseRoutes = Sentry.wrapUseRoutes(useRoutes);
-const sentryCreateBrowserRouter = Sentry.wrapCreateBrowserRouter(createBrowserRouter);
+const SentryRoutes = wrapReactRouterRouting(Routes);
+const sentryUseRoutes = wrapUseRoutes(useRoutes);
+const sentryCreateBrowserRouter = wrapCreateBrowserRouter(createBrowserRouter);
 
 const DetailsRoutes = () =>
   sentryUseRoutes([
diff --git a/dev-packages/e2e-tests/test-applications/react-router-8-spa/src/main.tsx b/dev-packages/e2e-tests/test-applications/react-router-8-spa/src/main.tsx
index 202de7be19b4..598ffc692d98 100644
--- a/dev-packages/e2e-tests/test-applications/react-router-8-spa/src/main.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-router-8-spa/src/main.tsx
@@ -1,4 +1,6 @@
 import * as Sentry from '@sentry/react';
+import { replayIntegration } from '@sentry/react/optional-browser-api';
+import { reactRouterBrowserTracingIntegration, wrapReactRouterRouting } from '@sentry/react/reactrouter.compat';
 import React from 'react';
 import ReactDOM from 'react-dom/client';
 import {
@@ -15,13 +17,13 @@ import Products from './pages/Products';
 import SSE from './pages/SSE';
 import User from './pages/User';
 
-const replay = Sentry.replayIntegration();
+const replay = replayIntegration();
 
 Sentry.init({
   environment: 'qa', // dynamic sampling bias to keep transactions
   dsn: import.meta.env.PUBLIC_E2E_TEST_DSN,
   integrations: [
-    Sentry.reactRouterBrowserTracingIntegration({
+    reactRouterBrowserTracingIntegration({
       useEffect: React.useEffect,
       useLocation,
       useNavigationType,
@@ -43,7 +45,7 @@ Sentry.init({
   dataCollection: { userInfo: true },
 });
 
-const SentryRoutes = Sentry.wrapReactRouterRouting(Routes);
+const SentryRoutes = wrapReactRouterRouting(Routes);
 
 const root = ReactDOM.createRoot(document.getElementById('root') as HTMLElement);
 root.render(
diff --git a/dev-packages/e2e-tests/test-applications/react-send-to-sentry/src/index.tsx b/dev-packages/e2e-tests/test-applications/react-send-to-sentry/src/index.tsx
index 3a87a53ffdfa..609ca37cbaee 100644
--- a/dev-packages/e2e-tests/test-applications/react-send-to-sentry/src/index.tsx
+++ b/dev-packages/e2e-tests/test-applications/react-send-to-sentry/src/index.tsx
@@ -1,4 +1,6 @@
 import * as Sentry from '@sentry/react';
+import { replayIntegration } from '@sentry/react/optional-browser-api';
+import { reactRouterV6BrowserTracingIntegration, withSentryReactRouterV6Routing } from '@sentry/react/reactrouterv6';
 import React from 'react';
 import ReactDOM from 'react-dom/client';
 import {
@@ -13,13 +15,13 @@ import {
 import Index from './pages/Index';
 import User from './pages/User';
 
-const replay = Sentry.replayIntegration();
+const replay = replayIntegration();
 
 Sentry.init({
   environment: 'qa', // dynamic sampling bias to keep transactions
   dsn: process.env.REACT_APP_E2E_TEST_DSN,
   integrations: [
-    Sentry.reactRouterV6BrowserTracingIntegration({
+    reactRouterV6BrowserTracingIntegration({
       useEffect: React.useEffect,
       useLocation,
       useNavigationType,
@@ -59,7 +61,7 @@ Sentry.addEventProcessor(event => {
   return event;
 });
 
-const SentryRoutes = Sentry.withSentryReactRouterV6Routing(Routes);
+const SentryRoutes = withSentryReactRouterV6Routing(Routes);
 
 const root = ReactDOM.createRoot(document.getElementById('root') as HTMLElement);
 root.render(
diff --git a/dev-packages/e2e-tests/test-applications/tanstack-router/src/main.tsx b/dev-packages/e2e-tests/test-applications/tanstack-router/src/main.tsx
index 3c2ed2905383..5088d3f91b6f 100644
--- a/dev-packages/e2e-tests/test-applications/tanstack-router/src/main.tsx
+++ b/dev-packages/e2e-tests/test-applications/tanstack-router/src/main.tsx
@@ -1,4 +1,5 @@
 import * as Sentry from '@sentry/react';
+import { tanstackRouterBrowserTracingIntegration } from '@sentry/react/tanstackrouter';
 import {
   Link,
   Outlet,
@@ -96,7 +97,7 @@ declare const __APP_DSN__: string;
 Sentry.init({
   environment: 'qa', // dynamic sampling bias to keep transactions
   dsn: __APP_DSN__,
-  integrations: [Sentry.tanstackRouterBrowserTracingIntegration(router)],
+  integrations: [tanstackRouterBrowserTracingIntegration(router)],
   // We recommend adjusting this value in production, or using tracesSampler
   // for finer control
   tracesSampleRate: 1.0,
diff --git a/packages/browser/package.json b/packages/browser/package.json
index 18b3bad89dca..ebdd8328c5b1 100644
--- a/packages/browser/package.json
+++ b/packages/browser/package.json
@@ -32,12 +32,31 @@
         "import": "./build/npm/esm/prod/index.js",
         "require": "./build/npm/cjs/prod/index.js"
       }
+    },
+    "./core": {
+      "types": "./build/npm/types/core.d.ts",
+      "react-native": "./build/npm/esm/prod/core.js",
+      "development": {
+        "import": "./build/npm/esm/dev/core.js",
+        "require": "./build/npm/cjs/dev/core.js"
+      },
+      "production": {
+        "import": "./build/npm/esm/prod/core.js",
+        "require": "./build/npm/cjs/prod/core.js"
+      },
+      "default": {
+        "import": "./build/npm/esm/prod/core.js",
+        "require": "./build/npm/cjs/prod/core.js"
+      }
     }
   },
   "typesVersions": {
     "<5.0": {
       "build/npm/types/index.d.ts": [
         "build/npm/types-ts3.8/index.d.ts"
+      ],
+      "core": [
+        "build/npm/types-ts3.8/core.d.ts"
       ]
     }
   },
@@ -69,7 +88,7 @@
     "build:bundle:watch": "rollup -c rollup.bundle.config.mjs --watch",
     "build:transpile:watch": "rollup -c rollup.npm.config.mjs --watch",
     "build:tarball": "npm pack",
-    "circularDepCheck": "madge --circular src/index.ts",
+    "circularDepCheck": "madge --circular src/index.ts && madge --circular src/core.ts",
     "clean": "rimraf build coverage .rpt2_cache sentry-browser-*.tgz",
     "lint:fix": "OXLINT_TSGOLINT_DANGEROUSLY_SUPPRESS_PROGRAM_DIAGNOSTICS=true oxlint . --fix --type-aware",
     "lint": "OXLINT_TSGOLINT_DANGEROUSLY_SUPPRESS_PROGRAM_DIAGNOSTICS=true oxlint . --type-aware",
diff --git a/packages/browser/rollup.npm.config.mjs b/packages/browser/rollup.npm.config.mjs
index a9df26ae0bae..96403071be2a 100644
--- a/packages/browser/rollup.npm.config.mjs
+++ b/packages/browser/rollup.npm.config.mjs
@@ -4,6 +4,8 @@ export default makeNPMConfigVariants(
   makeBaseNPMConfig({
     // packages with bundles have a different build directory structure
     hasBundles: true,
+    // `core` is a slim entry used by framework SDKs for tree-shakeable re-exports.
+    entrypoints: ['src/index.ts', 'src/core.ts'],
     packageSpecificConfig: {
       output: {
         // set exports to 'named' or 'auto' so that rollup doesn't warn
diff --git a/packages/browser/src/core.ts b/packages/browser/src/core.ts
new file mode 100644
index 000000000000..2c142cd1d6e7
--- /dev/null
+++ b/packages/browser/src/core.ts
@@ -0,0 +1,57 @@
+/**
+ * Tree-shakeable core browser SDK surface (`@sentry/browser/core`).
+ *
+ * Includes error monitoring, default integrations, and the tracing APIs that
+ * almost every production app needs — but **not** optional heavy features
+ * (Session Replay, Feedback UI, AI instrumenters, feature-flag integrations,
+ * profiling, etc.).
+ *
+ * Framework SDKs re-export from this entry so that bundlers which materialize
+ * a full dynamic-import namespace (e.g. Rolldown when destructuring
+ * `await import('@sentry/react')`) cannot pull optional packages into the
+ * critical path.
+ */
+export * from './exports';
+
+export { cultureContextIntegration } from './integrations/culturecontext';
+export { normalizeStringifyValue } from './normalizeStringifyValue';
+export { getAbsoluteUrl } from '@sentry/browser-utils';
+
+// --- Tracing (commonly used; still tree-shakeable if unused) ---
+export { defaultRequestInstrumentationOptions, instrumentOutgoingRequests } from './tracing/request';
+export type { RequestInstrumentationOptions } from './tracing/request';
+export {
+  browserTracingIntegration,
+  isBotUserAgent,
+  startBrowserTracingNavigationSpan,
+  startBrowserTracingPageLoadSpan,
+} from './tracing/browserTracingIntegration';
+export { reportPageLoaded } from './tracing/reportPageLoaded';
+export { setActiveSpanInBrowser } from './tracing/setActiveSpan';
+
+// --- Filtering / enrichment used by most production setups ---
+export {
+  registerSpanErrorInstrumentation,
+  getActiveSpan,
+  getRootSpan,
+  startSpan,
+  startInactiveSpan,
+  startSpanManual,
+  withActiveSpan,
+  startNewTrace,
+  bindScopeToEmitter,
+  getSpanDescendants,
+  setMeasurement,
+  getSpanStatusFromHttpCode,
+  setHttpStatus,
+  makeMultiplexedTransport,
+  MULTIPLEXED_TRANSPORT_EXTRA_KEY,
+  moduleMetadataIntegration,
+  thirdPartyErrorFilterIntegration,
+  captureConsoleIntegration,
+  extraErrorDataIntegration,
+  rewriteFramesIntegration,
+  consoleLoggingIntegration,
+  logger,
+} from '@sentry/core/browser';
+export type { Span } from '@sentry/core/browser';
diff --git a/packages/gatsby/src/index.ts b/packages/gatsby/src/index.ts
index 2299b46b7d64..f2f0503a9ac1 100644
--- a/packages/gatsby/src/index.ts
+++ b/packages/gatsby/src/index.ts
@@ -2,5 +2,13 @@
 // can be removed once following issue is fixed: https://github.com/import-js/eslint-plugin-import/issues/703
 /* eslint-disable import/export */
 export * from '@sentry/react';
+// Optional browser features and Redux are no longer star-exported through
+// `@sentry/react`. Re-export them so `import * as Sentry from '@sentry/gatsby'`
+// keeps the historical surface (including `createReduxEnhancer`).
+export * from '@sentry/react/optional-browser-api';
+// `uiProfiler` is on both `@sentry/react` and `optional-browser-api`; dual
+// `export *` would omit the name under ESM rules, so re-export it explicitly.
+export { uiProfiler } from '@sentry/react';
+export { createReduxEnhancer } from '@sentry/react/redux';
 
 export { init } from './sdk';
diff --git a/packages/nextjs/src/client/index.ts b/packages/nextjs/src/client/index.ts
index b7f9c482b816..410c11b7aa4e 100644
--- a/packages/nextjs/src/client/index.ts
+++ b/packages/nextjs/src/client/index.ts
@@ -16,6 +16,16 @@ import { removeIsrSsgTraceMetaTags } from './routing/isrRoutingTracing';
 import { applyTunnelRouteOption } from './tunnelRoute';
 
 export * from '@sentry/react';
+// Optional browser features and Redux are no longer star-exported through
+// `@sentry/react` (so the React entry tree-shakes under Rolldown dynamic imports).
+// Re-export them here so `import * as Sentry from '@sentry/nextjs'` keeps the
+// historical surface (including `createReduxEnhancer`, which is dual-declared
+// against the client SDK in `index.types.ts`).
+export * from '@sentry/react/optional-browser-api';
+// `uiProfiler` is on both `@sentry/react` and `optional-browser-api`; dual
+// `export *` would omit the name under ESM rules, so re-export it explicitly.
+export { uiProfiler } from '@sentry/react';
+export { createReduxEnhancer } from '@sentry/react/redux';
 export * from '../common';
 export { captureUnderscoreErrorException } from '../common/pages-router-instrumentation/_error';
 
diff --git a/packages/react/README.md b/packages/react/README.md
index b8d9879aa231..4ea7b3eadb42 100644
--- a/packages/react/README.md
+++ b/packages/react/README.md
@@ -12,8 +12,37 @@
 
 ## General
 
-This package is a wrapper around `@sentry/browser`, with added functionality related to React. All methods available in
-`@sentry/browser` can be imported from `@sentry/react`.
+This package is a wrapper around `@sentry/browser`, with added functionality related to React.
+
+The default `@sentry/react` entry is intentionally **tree-shakeable**: it re-exports core error monitoring and common
+tracing APIs, but **not** optional heavy browser features (Session Replay, User Feedback UI, AI instrumenters, feature
+flag integrations, …) or router/Redux helpers. Import those from a dedicated entry when you need them:
+
+```javascript
+import * as Sentry from '@sentry/react';
+import { replayIntegration } from '@sentry/browser';
+// or: import { replayIntegration } from '@sentry/react/optional-browser-api';
+// or: import { replayIntegration } from '@sentry/replay';
+
+Sentry.init({
+  dsn: '__DSN__',
+  integrations: [replayIntegration()],
+});
+```
+
+Router and Redux integrations are on package subpaths so they can be code-split:
+
+```javascript
+import { tanstackRouterBrowserTracingIntegration } from '@sentry/react/tanstackrouter';
+import { createReduxEnhancer } from '@sentry/react/redux';
+import { reactRouterV6BrowserTracingIntegration } from '@sentry/react/reactrouterv6';
+```
+
+**Breaking change:** symbols that previously came from the `@sentry/react` root
+(`replayIntegration`, `feedbackIntegration`, router helpers, `createReduxEnhancer`, …) must now be imported from
+`@sentry/browser`, `@sentry/react/optional-browser-api`, or the matching subpath above. Framework SDKs
+(`@sentry/nextjs`, `@sentry/gatsby`) still re-export the optional browser surface and `createReduxEnhancer` so
+`import * as Sentry from '@sentry/nextjs'` keeps working for those symbols.
 
 To use this SDK, call `Sentry.init(options)` before you mount your React component.
 
diff --git a/packages/react/optional-browser-api.d.ts b/packages/react/optional-browser-api.d.ts
new file mode 100644
index 000000000000..30eebdb67d51
--- /dev/null
+++ b/packages/react/optional-browser-api.d.ts
@@ -0,0 +1 @@
+export * from './build/types/optional-browser-api';
diff --git a/packages/react/package.json b/packages/react/package.json
index eed0a949a151..45dd4b3d6aa1 100644
--- a/packages/react/package.json
+++ b/packages/react/package.json
@@ -10,7 +10,8 @@
     "node": ">=18"
   },
   "files": [
-    "/build"
+    "/build",
+    "/*.d.ts"
   ],
   "main": "build/cjs/index.js",
   "module": "build/esm/index.js",
@@ -30,6 +31,86 @@
         "types": "./build/types/index.d.ts",
         "default": "./build/cjs/index.js"
       }
+    },
+    "./optional-browser-api": {
+      "import": {
+        "types": "./optional-browser-api.d.ts",
+        "default": "./build/esm/optional-browser-api.js"
+      },
+      "require": {
+        "types": "./optional-browser-api.d.ts",
+        "default": "./build/cjs/optional-browser-api.js"
+      }
+    },
+    "./tanstackrouter": {
+      "import": {
+        "types": "./tanstackrouter.d.ts",
+        "default": "./build/esm/tanstackrouter.js"
+      },
+      "require": {
+        "types": "./tanstackrouter.d.ts",
+        "default": "./build/cjs/tanstackrouter.js"
+      }
+    },
+    "./redux": {
+      "import": {
+        "types": "./redux.d.ts",
+        "default": "./build/esm/redux.js"
+      },
+      "require": {
+        "types": "./redux.d.ts",
+        "default": "./build/cjs/redux.js"
+      }
+    },
+    "./reactrouterv3": {
+      "import": {
+        "types": "./reactrouterv3.d.ts",
+        "default": "./build/esm/reactrouterv3.js"
+      },
+      "require": {
+        "types": "./reactrouterv3.d.ts",
+        "default": "./build/cjs/reactrouterv3.js"
+      }
+    },
+    "./reactrouter": {
+      "import": {
+        "types": "./reactrouter.d.ts",
+        "default": "./build/esm/reactrouter.js"
+      },
+      "require": {
+        "types": "./reactrouter.d.ts",
+        "default": "./build/cjs/reactrouter.js"
+      }
+    },
+    "./reactrouterv6": {
+      "import": {
+        "types": "./reactrouterv6.d.ts",
+        "default": "./build/esm/reactrouterv6.js"
+      },
+      "require": {
+        "types": "./reactrouterv6.d.ts",
+        "default": "./build/cjs/reactrouterv6.js"
+      }
+    },
+    "./reactrouterv7": {
+      "import": {
+        "types": "./reactrouterv7.d.ts",
+        "default": "./build/esm/reactrouterv7.js"
+      },
+      "require": {
+        "types": "./reactrouterv7.d.ts",
+        "default": "./build/cjs/reactrouterv7.js"
+      }
+    },
+    "./reactrouter.compat": {
+      "import": {
+        "types": "./reactrouter.compat.d.ts",
+        "default": "./build/esm/reactrouter.compat.js"
+      },
+      "require": {
+        "types": "./reactrouter.compat.d.ts",
+        "default": "./build/cjs/reactrouter.compat.js"
+      }
     }
   },
   "typesVersions": {
@@ -82,7 +163,7 @@
     "build:dev:watch": "yarn build:watch",
     "build:transpile:watch": "rollup -c rollup.npm.config.mjs --watch",
     "build:tarball": "npm pack",
-    "circularDepCheck": "madge --circular src/index.ts",
+    "circularDepCheck": "madge --circular src/index.ts && madge --circular src/tanstackrouter.ts && madge --circular src/redux.ts",
     "clean": "rimraf build coverage sentry-react-*.tgz",
     "lint:fix": "OXLINT_TSGOLINT_DANGEROUSLY_SUPPRESS_PROGRAM_DIAGNOSTICS=true oxlint . --fix --type-aware",
     "lint": "OXLINT_TSGOLINT_DANGEROUSLY_SUPPRESS_PROGRAM_DIAGNOSTICS=true oxlint . --type-aware",
diff --git a/packages/react/reactrouter.compat.d.ts b/packages/react/reactrouter.compat.d.ts
new file mode 100644
index 000000000000..ef0a756b14cc
--- /dev/null
+++ b/packages/react/reactrouter.compat.d.ts
@@ -0,0 +1 @@
+export * from './build/types/reactrouter.compat';
diff --git a/packages/react/reactrouter.d.ts b/packages/react/reactrouter.d.ts
new file mode 100644
index 000000000000..299f84a46ed4
--- /dev/null
+++ b/packages/react/reactrouter.d.ts
@@ -0,0 +1 @@
+export * from './build/types/reactrouter';
diff --git a/packages/react/reactrouterv3.d.ts b/packages/react/reactrouterv3.d.ts
new file mode 100644
index 000000000000..517a29703bcd
--- /dev/null
+++ b/packages/react/reactrouterv3.d.ts
@@ -0,0 +1 @@
+export * from './build/types/reactrouterv3';
diff --git a/packages/react/reactrouterv6.d.ts b/packages/react/reactrouterv6.d.ts
new file mode 100644
index 000000000000..4613606f5a7b
--- /dev/null
+++ b/packages/react/reactrouterv6.d.ts
@@ -0,0 +1 @@
+export * from './build/types/reactrouterv6';
diff --git a/packages/react/reactrouterv7.d.ts b/packages/react/reactrouterv7.d.ts
new file mode 100644
index 000000000000..16e168e3bb19
--- /dev/null
+++ b/packages/react/reactrouterv7.d.ts
@@ -0,0 +1 @@
+export * from './build/types/reactrouterv7';
diff --git a/packages/react/redux.d.ts b/packages/react/redux.d.ts
new file mode 100644
index 000000000000..fe5edaed00ff
--- /dev/null
+++ b/packages/react/redux.d.ts
@@ -0,0 +1 @@
+export * from './build/types/redux';
diff --git a/packages/react/rollup.npm.config.mjs b/packages/react/rollup.npm.config.mjs
index 66c3b16aba58..2bf245a95cb1 100644
--- a/packages/react/rollup.npm.config.mjs
+++ b/packages/react/rollup.npm.config.mjs
@@ -6,6 +6,19 @@ import { makeBaseNPMConfig, makeNPMConfigVariants } from '@sentry-internal/rollu
 // https://legacy.reactjs.org/blog/2020/09/22/introducing-the-new-jsx-transform.html
 export default makeNPMConfigVariants(
   makeBaseNPMConfig({
+    // Separate entrypoints for router/redux integrations so they can be imported
+    // via package subpaths without sitting on the main export list (tree-shaking).
+    entrypoints: [
+      'src/index.ts',
+      'src/optional-browser-api.ts',
+      'src/tanstackrouter.ts',
+      'src/redux.ts',
+      'src/reactrouterv3.ts',
+      'src/reactrouter.tsx',
+      'src/reactrouterv6.tsx',
+      'src/reactrouterv7.tsx',
+      'src/reactrouter.compat.tsx',
+    ],
     packageSpecificConfig: {
       external: ['react', 'react/jsx-runtime'],
     },
diff --git a/packages/react/src/browser-api.ts b/packages/react/src/browser-api.ts
new file mode 100644
index 000000000000..610fa7a46f5a
--- /dev/null
+++ b/packages/react/src/browser-api.ts
@@ -0,0 +1,167 @@
+/**
+ * Browser APIs re-exported from `@sentry/react`.
+ *
+ * This is intentionally a **curated** surface rather than `export * from '@sentry/browser'`.
+ *
+ * Why: bundlers that treat a dynamic `import('@sentry/react')` namespace as using every
+ * export (Rolldown when the namespace is destructured) would otherwise pull optional
+ * `@sentry/browser` features into the critical path — Replay (~265KB), Feedback, AI
+ * instrumenters, feature-flag integrations, etc. — even when the app never references them.
+ *
+ * Optional features remain available from `@sentry/browser` (full entry),
+ * `@sentry/react/optional-browser-api`, or dedicated packages (`@sentry/replay`, …).
+ *
+ * Everything here is re-exported from `@sentry/browser/core` so this module never
+ * links the full browser barrel.
+ */
+
+export type {
+  Breadcrumb,
+  BreadcrumbHint,
+  BrowserOptions,
+  CaptureContext,
+  Context,
+  Contexts,
+  ErrorEvent,
+  Event,
+  EventHint,
+  Exception,
+  ExclusiveEventHintOrCaptureContext,
+  Log,
+  LogSeverityLevel,
+  ReportDialogOptions,
+  RequestEventData,
+  RequestInstrumentationOptions,
+  SdkInfo,
+  Session,
+  SeverityLevel,
+  Span,
+  StackFrame,
+  Stacktrace,
+  Thread,
+  User,
+} from '@sentry/browser/core';
+
+export {
+  // Core client / scope APIs
+  addBreadcrumb,
+  addEventProcessor,
+  addIntegration,
+  BrowserClient,
+  captureEvent,
+  captureException,
+  captureFeedback,
+  captureMessage,
+  captureSession,
+  close,
+  continueTrace,
+  createTransport,
+  createUserFeedbackEnvelope,
+  endSession,
+  eventFromException,
+  eventFromMessage,
+  exceptionFromError,
+  flush,
+  forceLoad,
+  getClient,
+  getCurrentScope,
+  getDefaultIntegrations,
+  getGlobalScope,
+  getIsolationScope,
+  getTraceData,
+  isEnabled,
+  isInitialized,
+  lastEventId,
+  // eslint-disable-next-line typescript/no-deprecated
+  inboundFiltersIntegration,
+  eventFiltersIntegration,
+  functionToStringIntegration,
+  dedupeIntegration,
+  // Default browser integrations
+  breadcrumbsIntegration,
+  browserApiErrorsIntegration,
+  browserSessionIntegration,
+  cultureContextIntegration,
+  globalHandlersIntegration,
+  httpContextIntegration,
+  linkedErrorsIntegration,
+  // Transport / parsing
+  defaultStackLineParsers,
+  defaultStackParser,
+  chromeStackLineParser,
+  geckoStackLineParser,
+  opera10StackLineParser,
+  opera11StackLineParser,
+  winjsStackLineParser,
+  makeFetchTransport,
+  // Manual UI profiling API (pairs with browserProfilingIntegration from
+  // optional-browser-api / @sentry/browser). Was on the pre-curation public
+  // surface via export * from @sentry/browser.
+  uiProfiler,
+  getAbsoluteUrl,
+  // Scope helpers
+  metrics,
+  onLoad,
+  parameterize,
+  Scope,
+  SDK_VERSION,
+  SEMANTIC_ATTRIBUTE_SENTRY_OP,
+  SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN,
+  SEMANTIC_ATTRIBUTE_SENTRY_SAMPLE_RATE,
+  SEMANTIC_ATTRIBUTE_SENTRY_SOURCE,
+  setAttribute,
+  setAttributes,
+  setContext,
+  setConversationId,
+  setCurrentClient,
+  setExtra,
+  setExtras,
+  setTag,
+  setTags,
+  setUser,
+  showReportDialog,
+  spanToBaggageHeader,
+  spanToJSON,
+  spanToTraceHeader,
+  startSession,
+  suppressTracing,
+  updateSpanName,
+  withIsolationScope,
+  withScope,
+  withStreamedSpan,
+  WINDOW,
+  lazyLoadIntegration,
+  normalizeStringifyValue,
+  // Tracing
+  browserTracingIntegration,
+  defaultRequestInstrumentationOptions,
+  instrumentOutgoingRequests,
+  isBotUserAgent,
+  reportPageLoaded,
+  setActiveSpanInBrowser,
+  startBrowserTracingNavigationSpan,
+  startBrowserTracingPageLoadSpan,
+  bindScopeToEmitter,
+  getActiveSpan,
+  getRootSpan,
+  getSpanDescendants,
+  getSpanStatusFromHttpCode,
+  registerSpanErrorInstrumentation,
+  setHttpStatus,
+  setMeasurement,
+  startInactiveSpan,
+  startNewTrace,
+  startSpan,
+  startSpanManual,
+  withActiveSpan,
+  // Filtering / enrichment
+  thirdPartyErrorFilterIntegration,
+  moduleMetadataIntegration,
+  rewriteFramesIntegration,
+  captureConsoleIntegration,
+  extraErrorDataIntegration,
+  consoleLoggingIntegration,
+  logger,
+  makeMultiplexedTransport,
+  MULTIPLEXED_TRANSPORT_EXTRA_KEY,
+} from '@sentry/browser/core';
diff --git a/packages/react/src/index.ts b/packages/react/src/index.ts
index a25f05e62a2f..7e2d9318709b 100644
--- a/packages/react/src/index.ts
+++ b/packages/react/src/index.ts
@@ -1,41 +1,34 @@
 // import/export got a false positive, and affects most of our index barrel files
 // can be removed once following issue is fixed: https://github.com/import-js/eslint-plugin-import/issues/703
 /* eslint-disable import/export */
-export * from '@sentry/browser';
+
+/**
+ * @sentry/react public entry — tree-shakeable by default.
+ *
+ * Deliberately does **not** use `export * from '@sentry/browser'`. That star-export
+ * put every optional browser feature (Session Replay, Feedback UI, AI SDKs, feature
+ * flags, …) on this module's export list. Bundlers that materialize the full
+ * namespace for `import('@sentry/react')` (Rolldown when destructuring the result)
+ * then shipped hundreds of KB of unused code on the critical path.
+ *
+ * Optional browser features: import from `@sentry/browser` or the dedicated package.
+ * Router-specific integrations: import from a subpath, e.g.
+ * `@sentry/react/tanstackrouter`.
+ */
+
+export * from './browser-api';
 
 export { init } from './sdk';
 export { captureReactException, reactErrorHandler } from './error';
 export { Profiler, withProfiler, useProfiler } from './profiler';
 export type { ErrorBoundaryProps, FallbackRender } from './errorboundary';
 export { ErrorBoundary, withErrorBoundary } from './errorboundary';
-export { createReduxEnhancer } from './redux';
-export { reactRouterV3BrowserTracingIntegration } from './reactrouterv3';
-export { tanstackRouterBrowserTracingIntegration } from './tanstackrouter';
-export {
-  withSentryRouting,
-  reactRouterV4BrowserTracingIntegration,
-  reactRouterV5BrowserTracingIntegration,
-} from './reactrouter';
-/* oxlint-disable typescript/no-deprecated -- Intentional re-exports for backwards compatibility */
-export {
-  reactRouterV6BrowserTracingIntegration,
-  withSentryReactRouterV6Routing,
-  wrapUseRoutesV6,
-  wrapCreateBrowserRouterV6,
-  wrapCreateMemoryRouterV6,
-} from './reactrouterv6';
-export {
-  reactRouterV7BrowserTracingIntegration,
-  withSentryReactRouterV7Routing,
-  wrapCreateBrowserRouterV7,
-  wrapCreateMemoryRouterV7,
-  wrapUseRoutesV7,
-} from './reactrouterv7';
-/* oxlint-enable typescript/no-deprecated */
-export {
-  reactRouterBrowserTracingIntegration,
-  wrapReactRouterRouting,
-  wrapCreateBrowserRouter,
-  wrapCreateMemoryRouter,
-  wrapUseRoutes,
-} from './reactrouter.compat';
+
+// Router / Redux integrations live on subpaths so they are not part of this
+// entry's export list (see package.json "exports"). Re-exporting them here would
+// re-introduce the tree-shaking hole for dynamic `import('@sentry/react')`.
+//
+//   import { tanstackRouterBrowserTracingIntegration } from '@sentry/react/tanstackrouter';
+//   import { createReduxEnhancer } from '@sentry/react/redux';
+//   import { reactRouterV6BrowserTracingIntegration } from '@sentry/react/reactrouterv6';
+//   …
diff --git a/packages/react/src/optional-browser-api.ts b/packages/react/src/optional-browser-api.ts
new file mode 100644
index 000000000000..82f41a0753d6
--- /dev/null
+++ b/packages/react/src/optional-browser-api.ts
@@ -0,0 +1,76 @@
+/**
+ * Optional `@sentry/browser` features that are **not** part of the default
+ * `@sentry/react` entry (for tree-shaking).
+ *
+ * Framework SDKs (`@sentry/nextjs`, `@sentry/gatsby`, …) re-export these so
+ * `import * as Sentry from '@sentry/nextjs'` keeps the historical surface.
+ *
+ * Application code may also import from here, or directly from `@sentry/browser`
+ * / dedicated packages (`@sentry/replay`, `@sentry/feedback`, …).
+ */
+export {
+  // Replay
+  getReplay,
+  replayCanvasIntegration,
+  replayIntegration,
+  // Feedback
+  feedbackAsyncIntegration,
+  feedbackIntegration,
+  feedbackSyncIntegration,
+  getFeedback,
+  sendFeedback,
+  // Optional integrations
+  // uiProfiler is also on the root surface; re-export here so
+  // `import { uiProfiler, browserProfilingIntegration } from '@sentry/react/optional-browser-api'`
+  // keeps working for manual UI profiling setups.
+  browserProfilingIntegration,
+  uiProfiler,
+  contextLinesIntegration,
+  createConsolaReporter,
+  diagnoseSdkConnectivity,
+  elementTimingIntegration,
+  featureFlagsIntegration,
+  fetchStreamPerformanceIntegration,
+  graphqlClientIntegration,
+  httpClientIntegration,
+  makeBrowserOfflineTransport,
+  registerWebWorker,
+  reportingObserverIntegration,
+  spanStreamingIntegration,
+  spotlightBrowserIntegration,
+  supabaseIntegration,
+  instrumentSupabaseClient,
+  viewHierarchyIntegration,
+  webVitalsIntegration,
+  webWorkerIntegration,
+  zodErrorsIntegration,
+  // Feature flags
+  buildLaunchDarklyFlagUsedHandler,
+  growthbookIntegration,
+  launchDarklyIntegration,
+  openFeatureIntegration,
+  OpenFeatureIntegrationHook,
+  statsigIntegration,
+  unleashIntegration,
+  // AI instrumenters
+  createLangChainCallbackHandler,
+  instrumentAnthropicAiClient,
+  instrumentCreateReactAgent,
+  instrumentGoogleGenAIClient,
+  instrumentLangChainEmbeddings,
+  instrumentLangGraph,
+  instrumentOpenAiClient,
+} from '@sentry/browser';
+
+export type {
+  FeatureFlagsIntegration,
+  ReplayBreadcrumbFrame,
+  ReplayBreadcrumbFrameEvent,
+  ReplayEventType,
+  ReplayEventWithTime,
+  ReplayFrame,
+  ReplayFrameEvent,
+  ReplayOptionFrameEvent,
+  ReplaySpanFrame,
+  ReplaySpanFrameEvent,
+} from '@sentry/browser';
diff --git a/packages/react/src/tanstackrouter.ts b/packages/react/src/tanstackrouter.ts
index 42993182cd55..fffa8c6f90ed 100644
--- a/packages/react/src/tanstackrouter.ts
+++ b/packages/react/src/tanstackrouter.ts
@@ -25,8 +25,25 @@ interface TanstackRouterLocation {
  *
  * The minimum compatible version of `@tanstack/react-router` is `1.64.0`.
  *
+ * Import from `@sentry/react/tanstackrouter` (not the package root) so this code is not
+ * part of the main `@sentry/react` export list. That keeps dynamic
+ * `import('@sentry/react')` namespaces tree-shakeable.
+ *
  * @param router A TanStack Router `Router` instance that should be used for routing instrumentation.
  * @param options Sentry browser tracing configuration.
+ *
+ * @example
+ * ```ts
+ * import { init, addIntegration } from '@sentry/react';
+ * import { tanstackRouterBrowserTracingIntegration } from '@sentry/react/tanstackrouter';
+ *
+ * init({ dsn: '...' });
+ *
+ * // Safe to defer: only the tanstack subpath is loaded
+ * void import('@sentry/react/tanstackrouter').then(({ tanstackRouterBrowserTracingIntegration }) => {
+ *   addIntegration(tanstackRouterBrowserTracingIntegration(router));
+ * });
+ * ```
  */
 export function tanstackRouterBrowserTracingIntegration(
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
diff --git a/packages/react/tanstackrouter.d.ts b/packages/react/tanstackrouter.d.ts
new file mode 100644
index 000000000000..fd91c8d1b102
--- /dev/null
+++ b/packages/react/tanstackrouter.d.ts
@@ -0,0 +1 @@
+export * from './build/types/tanstackrouter';
diff --git a/packages/react/test/exports.treeshake.test.ts b/packages/react/test/exports.treeshake.test.ts
new file mode 100644
index 000000000000..9da465e8ae6d
--- /dev/null
+++ b/packages/react/test/exports.treeshake.test.ts
@@ -0,0 +1,65 @@
+/**
+ * @vitest-environment node
+ *
+ * Guard the curated `@sentry/react` export surface.
+ *
+ * Optional heavy browser features must not appear on the package root so that
+ * bundlers which materialize the full module namespace for
+ * `import('@sentry/react')` (Rolldown + destructuring) cannot pull them into
+ * the critical path.
+ */
+import { describe, expect, it } from 'vitest';
+import * as SentryReact from '../src/index';
+
+describe('@sentry/react export surface (tree-shaking)', () => {
+  it('exposes core error monitoring and tracing APIs', () => {
+    expect(typeof SentryReact.init).toBe('function');
+    expect(typeof SentryReact.captureException).toBe('function');
+    expect(typeof SentryReact.browserApiErrorsIntegration).toBe('function');
+    expect(typeof SentryReact.breadcrumbsIntegration).toBe('function');
+    expect(typeof SentryReact.browserTracingIntegration).toBe('function');
+    expect(typeof SentryReact.thirdPartyErrorFilterIntegration).toBe('function');
+    expect(typeof SentryReact.ErrorBoundary).toBe('function');
+    expect(typeof SentryReact.reactErrorHandler).toBe('function');
+    // Public API previously re-exported via export * from @sentry/browser
+    expect(SentryReact.uiProfiler).toBeDefined();
+    expect(typeof SentryReact.uiProfiler.startProfiler).toBe('function');
+    expect(typeof SentryReact.uiProfiler.stopProfiler).toBe('function');
+    expect(typeof SentryReact.getAbsoluteUrl).toBe('function');
+  });
+
+  it('does not export optional heavy browser features from the root entry', () => {
+    const root = SentryReact as Record<string, unknown>;
+
+    // These live on `@sentry/browser` / dedicated packages / optional-browser-api
+    expect(root.replayIntegration).toBeUndefined();
+    expect(root.getReplay).toBeUndefined();
+    expect(root.feedbackIntegration).toBeUndefined();
+    expect(root.getFeedback).toBeUndefined();
+    expect(root.instrumentOpenAiClient).toBeUndefined();
+    expect(root.instrumentAnthropicAiClient).toBeUndefined();
+    expect(root.launchDarklyIntegration).toBeUndefined();
+    expect(root.browserProfilingIntegration).toBeUndefined();
+    expect(root.diagnoseSdkConnectivity).toBeUndefined();
+  });
+
+  it('re-exports uiProfiler from optional-browser-api with browserProfilingIntegration', async () => {
+    const optional = await import('../src/optional-browser-api');
+    expect(optional.uiProfiler).toBeDefined();
+    expect(typeof optional.browserProfilingIntegration).toBe('function');
+    expect(typeof optional.featureFlagsIntegration).toBe('function');
+    // Type-only export is erased at runtime; the value companion is what consumers use
+    // with getIntegrationByName<FeatureFlagsIntegration>(...).
+    expect(optional).toHaveProperty('featureFlagsIntegration');
+  });
+
+  it('does not export router integrations from the root entry', () => {
+    const root = SentryReact as Record<string, unknown>;
+
+    // Import from `@sentry/react/tanstackrouter`, `/reactrouterv6`, etc.
+    expect(root.tanstackRouterBrowserTracingIntegration).toBeUndefined();
+    expect(root.reactRouterV6BrowserTracingIntegration).toBeUndefined();
+    expect(root.reactRouterV7BrowserTracingIntegration).toBeUndefined();
+    expect(root.createReduxEnhancer).toBeUndefined();
+  });
+});
diff --git a/packages/react/test/reactrouterv4.test.tsx b/packages/react/test/reactrouterv4.test.tsx
index 779adfb31559..69f23c8c5f61 100644
--- a/packages/react/test/reactrouterv4.test.tsx
+++ b/packages/react/test/reactrouterv4.test.tsx
@@ -16,7 +16,8 @@ import { act } from 'react';
 import { matchPath, Route, Router, Switch } from 'react-router-4';
 import { beforeEach, describe, expect, it, vi } from 'vitest';
 import { URL_TEMPLATE } from '@sentry/conventions/attributes';
-import { BrowserClient, reactRouterV4BrowserTracingIntegration, withSentryRouting } from '../src';
+import { BrowserClient } from '../src';
+import { reactRouterV4BrowserTracingIntegration, withSentryRouting } from '../src/reactrouter';
 import type { RouteConfig } from '../src/reactrouter';
 
 const mockStartBrowserTracingPageLoadSpan = vi.fn();
diff --git a/packages/react/test/reactrouterv5.test.tsx b/packages/react/test/reactrouterv5.test.tsx
index 7841833fb6cc..7cfa8b41c88e 100644
--- a/packages/react/test/reactrouterv5.test.tsx
+++ b/packages/react/test/reactrouterv5.test.tsx
@@ -16,7 +16,8 @@ import { act } from 'react';
 import { matchPath, Route, Router, Switch } from 'react-router-5';
 import { beforeEach, describe, expect, it, vi } from 'vitest';
 import { URL_TEMPLATE } from '@sentry/conventions/attributes';
-import { BrowserClient, reactRouterV5BrowserTracingIntegration, withSentryRouting } from '../src';
+import { BrowserClient } from '../src';
+import { reactRouterV5BrowserTracingIntegration, withSentryRouting } from '../src/reactrouter';
 import type { RouteConfig } from '../src/reactrouter';
 
 const mockStartBrowserTracingPageLoadSpan = vi.fn();
diff --git a/packages/remix/src/client/index.ts b/packages/remix/src/client/index.ts
index 65e6b9fbc184..e7e2f05e1d7f 100644
--- a/packages/remix/src/client/index.ts
+++ b/packages/remix/src/client/index.ts
@@ -5,6 +5,14 @@ import { debug } from '@sentry/core';
 import { DEBUG_BUILD } from '../utils/debug-build';
 
 export * from '@sentry/react';
+// Optional browser features and Redux are no longer star-exported through
+// `@sentry/react`. Re-export them so `import * as Sentry from '@sentry/remix'`
+// keeps the historical surface.
+export * from '@sentry/react/optional-browser-api';
+// `uiProfiler` is on both `@sentry/react` and `optional-browser-api`; dual
+// `export *` would omit the name under ESM rules, so re-export it explicitly.
+export { uiProfiler } from '@sentry/react';
+export { createReduxEnhancer } from '@sentry/react/redux';
 
 export { init } from './sdk';
 export { captureRemixErrorBoundaryError } from './errors';
diff --git a/packages/remix/src/cloudflare/index.ts b/packages/remix/src/cloudflare/index.ts
index ef2f89cee2a5..a2c14fb07151 100644
--- a/packages/remix/src/cloudflare/index.ts
+++ b/packages/remix/src/cloudflare/index.ts
@@ -8,6 +8,13 @@ import {
 } from '../server/instrumentServer';
 
 export * from '@sentry/react';
+// Optional browser features and Redux are no longer star-exported through
+// `@sentry/react`. Re-export them so the cloudflare entry keeps the historical surface.
+export * from '@sentry/react/optional-browser-api';
+// `uiProfiler` is on both `@sentry/react` and `optional-browser-api`; dual
+// `export *` would omit the name under ESM rules, so re-export it explicitly.
+export { uiProfiler } from '@sentry/react';
+export { createReduxEnhancer } from '@sentry/react/redux';
 
 export { captureRemixErrorBoundaryError } from '../client/errors';
 export { withSentry } from '../client/performance';
diff --git a/packages/tanstackstart-react/src/client/index.ts b/packages/tanstackstart-react/src/client/index.ts
index 73c7e4cf7b24..47cbe9a5347b 100644
--- a/packages/tanstackstart-react/src/client/index.ts
+++ b/packages/tanstackstart-react/src/client/index.ts
@@ -9,6 +9,15 @@ import type {
 import type { CreateSentryTunnelRouteOptions } from '../server/tunnelRoute';
 
 export * from '@sentry/react';
+// Optional browser features and router helpers are no longer star-exported through
+// `@sentry/react`. Re-export them so `import * as Sentry from '@sentry/tanstackstart-react'`
+// keeps the historical surface (including `tanstackRouterBrowserTracingIntegration`,
+// which is dual-declared against the client SDK in `index.types.ts`).
+export * from '@sentry/react/optional-browser-api';
+// `uiProfiler` is on both `@sentry/react` and `optional-browser-api`; dual
+// `export *` would omit the name under ESM rules, so re-export it explicitly.
+export { uiProfiler } from '@sentry/react';
+export { tanstackRouterBrowserTracingIntegration } from '@sentry/react/tanstackrouter';
 
 export { init } from './sdk';