diff --git a/docs/config/index.md b/docs/config/index.md
index 212e0439dd2b5f..1c61f2bef5b7ac 100644
--- a/docs/config/index.md
+++ b/docs/config/index.md
@@ -477,7 +477,7 @@ export default defineConfig(({ command, mode }) => {
 ### server.port
 
 - **Type:** `number`
-- **Default:** `3000`
+- **Default:** `5173`
 
   Specify server port. Note if the port is already being used, Vite will automatically try the next available port so this may not be the actual port the server ends up listening on.
 
@@ -551,7 +551,7 @@ export default defineConfig(({ command, mode }) => {
         },
         // Proxying websockets or socket.io
         '/socket.io': {
-          target: 'ws://localhost:3000',
+          target: 'ws://localhost:5173',
           ws: true
         }
       }
diff --git a/docs/guide/api-plugin.md b/docs/guide/api-plugin.md
index 76b9984a069828..735a30d3266909 100644
--- a/docs/guide/api-plugin.md
+++ b/docs/guide/api-plugin.md
@@ -11,7 +11,7 @@ Vite strives to offer established patterns out of the box, so before creating a
 When creating a plugin, you can inline it in your `vite.config.js`. There is no need to create a new package for it. Once you see that a plugin was useful in your projects, consider sharing it to help others [in the ecosystem](https://chat.vitejs.dev).
 
 ::: tip
-When learning, debugging, or authoring plugins we suggest including [vite-plugin-inspect](https://github.com/antfu/vite-plugin-inspect) in your project. It allows you to inspect the intermediate state of Vite plugins. After installing, you can visit `localhost:3000/__inspect/` to inspect the modules and transformation stack of your project. Check out install instructions in the [vite-plugin-inspect docs](https://github.com/antfu/vite-plugin-inspect).
+When learning, debugging, or authoring plugins we suggest including [vite-plugin-inspect](https://github.com/antfu/vite-plugin-inspect) in your project. It allows you to inspect the intermediate state of Vite plugins. After installing, you can visit `localhost:5173/__inspect/` to inspect the modules and transformation stack of your project. Check out install instructions in the [vite-plugin-inspect docs](https://github.com/antfu/vite-plugin-inspect).
 ![vite-plugin-inspect](/images/vite-plugin-inspect.png)
 :::
 
diff --git a/docs/guide/backend-integration.md b/docs/guide/backend-integration.md
index 17387bb7819ec0..06f2941c1015a2 100644
--- a/docs/guide/backend-integration.md
+++ b/docs/guide/backend-integration.md
@@ -29,11 +29,11 @@ If you need a custom integration, you can follow the steps in this guide to conf
    import 'vite/modulepreload-polyfill'
    ```
 
-2. For development, inject the following in your server's HTML template (substitute `http://localhost:3000` with the local URL Vite is running at):
+2. For development, inject the following in your server's HTML template (substitute `http://localhost:5173` with the local URL Vite is running at):
 
    ```html
    <!-- if development -->
-   <script type="module" src="http://localhost:3000/main.js"></script>
+   <script type="module" src="http://localhost:5173/main.js"></script>
    ```
 
    In order to properly serve assets, you have two options:
@@ -47,7 +47,7 @@ If you need a custom integration, you can follow the steps in this guide to conf
 
    ```html
    <script type="module">
-     import RefreshRuntime from 'http://localhost:3000/@react-refresh'
+     import RefreshRuntime from 'http://localhost:5173/@react-refresh'
      RefreshRuntime.injectIntoGlobalHook(window)
      window.$RefreshReg$ = () => {}
      window.$RefreshSig$ = () => (type) => type
diff --git a/docs/guide/ssr.md b/docs/guide/ssr.md
index 1abd4874bca0e2..319b461022433d 100644
--- a/docs/guide/ssr.md
+++ b/docs/guide/ssr.md
@@ -89,7 +89,7 @@ async function createServer() {
     // serve index.html - we will tackle this next
   })
 
-  app.listen(3000)
+  app.listen(5173)
 }
 
 createServer()
diff --git a/packages/vite/src/node/server/index.ts b/packages/vite/src/node/server/index.ts
index caea284bbb8e90..b7e05c2951ba00 100644
--- a/packages/vite/src/node/server/index.ts
+++ b/packages/vite/src/node/server/index.ts
@@ -571,7 +571,7 @@ async function startServer(
   }
 
   const options = server.config.server
-  const port = inlinePort ?? options.port ?? 3000
+  const port = inlinePort ?? options.port ?? 5173
   const hostname = resolveHostname(options.host)
 
   const protocol = options.https ? 'https' : 'http'
diff --git a/packages/vite/src/node/server/middlewares/indexHtml.ts b/packages/vite/src/node/server/middlewares/indexHtml.ts
index 80afe7f79a3535..76b190bfa0ce85 100644
--- a/packages/vite/src/node/server/middlewares/indexHtml.ts
+++ b/packages/vite/src/node/server/middlewares/indexHtml.ts
@@ -92,10 +92,10 @@ const processNodeUrl = (
     originalUrl !== '/' &&
     htmlPath === '/index.html'
   ) {
-    // #3230 if some request url (localhost:3000/a/b) return to fallback html, the relative assets
+    // #3230 if some request url (localhost:5173/a/b) return to fallback html, the relative assets
     // path will add `/a/` prefix, it will caused 404.
-    // rewrite before `./index.js` -> `localhost:3000/a/index.js`.
-    // rewrite after `../index.js` -> `localhost:3000/index.js`.
+    // rewrite before `./index.js` -> `localhost:5173/a/index.js`.
+    // rewrite after `../index.js` -> `localhost:5173/index.js`.
     s.overwrite(
       node.value!.loc.start.offset,
       node.value!.loc.end.offset,
diff --git a/playground/cli-module/__tests__/serve.ts b/playground/cli-module/__tests__/serve.ts
index 87d036600f77e6..5d40149300f6a5 100644
--- a/playground/cli-module/__tests__/serve.ts
+++ b/playground/cli-module/__tests__/serve.ts
@@ -94,7 +94,7 @@ export async function serve() {
   }
 
   try {
-    await startedOnPort(serverProcess, port, 3000)
+    await startedOnPort(serverProcess, port, 5173)
     return { close }
   } catch (e) {
     collectErrorStreams('server', e)
diff --git a/playground/cli/__tests__/serve.ts b/playground/cli/__tests__/serve.ts
index 6f80726e309082..6dbc05708d9cec 100644
--- a/playground/cli/__tests__/serve.ts
+++ b/playground/cli/__tests__/serve.ts
@@ -79,7 +79,7 @@ export async function serve() {
       const timeoutError = `server process still alive after 3s`
       try {
         await killProcess(serverProcess)
-        await resolvedOrTimeout(serverProcess, 3000, timeoutError)
+        await resolvedOrTimeout(serverProcess, 5173, timeoutError)
       } catch (e) {
         if (e === timeoutError || (!serverProcess.killed && !isWindows)) {
           collectErrorStreams('server', e)
@@ -94,7 +94,7 @@ export async function serve() {
   }
 
   try {
-    await startedOnPort(serverProcess, port, 3000)
+    await startedOnPort(serverProcess, port, 5173)
     return { close }
   } catch (e) {
     collectErrorStreams('server', e)
diff --git a/playground/json/server.js b/playground/json/server.js
index d7803b94f4b81a..6d9007dcd2b75e 100644
--- a/playground/json/server.js
+++ b/playground/json/server.js
@@ -78,8 +78,8 @@ async function createServer(
 
 if (!isTest) {
   createServer().then(({ app }) =>
-    app.listen(3000, () => {
-      console.log('http://localhost:3000')
+    app.listen(5173, () => {
+      console.log('http://localhost:5173')
     })
   )
 }
diff --git a/playground/optimize-missing-deps/server.js b/playground/optimize-missing-deps/server.js
index 65675fe0feb589..03a6b4d4ef7969 100644
--- a/playground/optimize-missing-deps/server.js
+++ b/playground/optimize-missing-deps/server.js
@@ -51,8 +51,8 @@ async function createServer(root = process.cwd()) {
 
 if (!isTest) {
   createServer().then(({ app }) =>
-    app.listen(3000, () => {
-      console.log('http://localhost:3000')
+    app.listen(5173, () => {
+      console.log('http://localhost:5173')
     })
   )
 }
diff --git a/playground/ssr-deps/server.js b/playground/ssr-deps/server.js
index 89a64ae51fdc94..8ab5186e9dd582 100644
--- a/playground/ssr-deps/server.js
+++ b/playground/ssr-deps/server.js
@@ -58,8 +58,8 @@ async function createServer(
 
 if (!isTest) {
   createServer().then(({ app }) =>
-    app.listen(3000, () => {
-      console.log('http://localhost:3000')
+    app.listen(5173, () => {
+      console.log('http://localhost:5173')
     })
   )
 }
diff --git a/playground/ssr-html/server.js b/playground/ssr-html/server.js
index 1f2cd5331c0157..a8557e2b7fff28 100644
--- a/playground/ssr-html/server.js
+++ b/playground/ssr-html/server.js
@@ -88,8 +88,8 @@ async function createServer(
 
 if (!isTest) {
   createServer().then(({ app }) =>
-    app.listen(3000, () => {
-      console.log('http://localhost:3000')
+    app.listen(5173, () => {
+      console.log('http://localhost:5173')
     })
   )
 }
diff --git a/playground/ssr-pug/server.js b/playground/ssr-pug/server.js
index 3cea5c48dde00b..f9753ce496b283 100644
--- a/playground/ssr-pug/server.js
+++ b/playground/ssr-pug/server.js
@@ -66,8 +66,8 @@ async function createServer(
 
 if (!isTest) {
   createServer().then(({ app }) =>
-    app.listen(3000, () => {
-      console.log('http://localhost:3000')
+    app.listen(5173, () => {
+      console.log('http://localhost:5173')
     })
   )
 }
diff --git a/playground/ssr-react/server.js b/playground/ssr-react/server.js
index bac272a95a2900..e9605f80e2d331 100644
--- a/playground/ssr-react/server.js
+++ b/playground/ssr-react/server.js
@@ -87,8 +87,8 @@ async function createServer(
 
 if (!isTest) {
   createServer().then(({ app }) =>
-    app.listen(3000, () => {
-      console.log('http://localhost:3000')
+    app.listen(5173, () => {
+      console.log('http://localhost:5173')
     })
   )
 }
diff --git a/playground/ssr-vue/server.js b/playground/ssr-vue/server.js
index c98d2984f82e5c..d23aaf62f4a474 100644
--- a/playground/ssr-vue/server.js
+++ b/playground/ssr-vue/server.js
@@ -86,8 +86,8 @@ async function createServer(
 
 if (!isTest) {
   createServer().then(({ app }) =>
-    app.listen(3000, () => {
-      console.log('http://localhost:3000')
+    app.listen(5173, () => {
+      console.log('http://localhost:5173')
     })
   )
 }
diff --git a/playground/ssr-webworker/worker.js b/playground/ssr-webworker/worker.js
index e9a51e320c9899..baa4fe485e02de 100644
--- a/playground/ssr-webworker/worker.js
+++ b/playground/ssr-webworker/worker.js
@@ -16,8 +16,8 @@ async function createServer() {
 
 if (!isTest) {
   createServer().then(({ app }) =>
-    app.listen(3000, () => {
-      console.log('http://localhost:3000')
+    app.listen(5173, () => {
+      console.log('http://localhost:5173')
     })
   )
 }