diff --git a/packages/nuxt3/src/babel-preset-app/index.js b/packages/nuxt3/src/babel-preset-app/index.js
index 7735d9ad4b..858d1ef2e3 100644
--- a/packages/nuxt3/src/babel-preset-app/index.js
+++ b/packages/nuxt3/src/babel-preset-app/index.js
@@ -143,6 +143,8 @@ module.exports = (api, options = {}) => {
       shippedProposals,
       forceAllTransforms
     }
+  ], [
+    require('@babel/preset-typescript')
   ])
 
   // JSX
diff --git a/packages/nuxt3/src/index.ts b/packages/nuxt3/src/index.ts
new file mode 100644
index 0000000000..8cb0970ca1
--- /dev/null
+++ b/packages/nuxt3/src/index.ts
@@ -0,0 +1,3 @@
+export * from './core'
+
+export const getBuilder = () => import('./builder')
diff --git a/packages/nuxt3/src/vue-app/components/index.js b/packages/nuxt3/src/vue-app/components/index.ts
similarity index 100%
rename from packages/nuxt3/src/vue-app/components/index.js
rename to packages/nuxt3/src/vue-app/components/index.ts
diff --git a/packages/nuxt3/src/vue-app/index.js b/packages/nuxt3/src/vue-app/index.ts
similarity index 100%
rename from packages/nuxt3/src/vue-app/index.js
rename to packages/nuxt3/src/vue-app/index.ts
diff --git a/packages/nuxt3/src/vue-app/nuxt.js b/packages/nuxt3/src/vue-app/nuxt.ts
similarity index 100%
rename from packages/nuxt3/src/vue-app/nuxt.js
rename to packages/nuxt3/src/vue-app/nuxt.ts
diff --git a/packages/nuxt3/src/vue-app/nuxt/entry.client.js b/packages/nuxt3/src/vue-app/nuxt/entry.client.ts
similarity index 100%
rename from packages/nuxt3/src/vue-app/nuxt/entry.client.js
rename to packages/nuxt3/src/vue-app/nuxt/entry.client.ts
diff --git a/packages/nuxt3/src/vue-app/nuxt/entry.server.js b/packages/nuxt3/src/vue-app/nuxt/entry.server.ts
similarity index 100%
rename from packages/nuxt3/src/vue-app/nuxt/entry.server.js
rename to packages/nuxt3/src/vue-app/nuxt/entry.server.ts
diff --git a/packages/nuxt3/src/vue-app/nuxt/plugins.client.js b/packages/nuxt3/src/vue-app/nuxt/plugins.client.ts
similarity index 100%
rename from packages/nuxt3/src/vue-app/nuxt/plugins.client.js
rename to packages/nuxt3/src/vue-app/nuxt/plugins.client.ts
diff --git a/packages/nuxt3/src/vue-app/nuxt/plugins.server.js b/packages/nuxt3/src/vue-app/nuxt/plugins.server.ts
similarity index 100%
rename from packages/nuxt3/src/vue-app/nuxt/plugins.server.js
rename to packages/nuxt3/src/vue-app/nuxt/plugins.server.ts
diff --git a/packages/nuxt3/src/vue-app/nuxt/plugins.js b/packages/nuxt3/src/vue-app/nuxt/plugins.ts
similarity index 100%
rename from packages/nuxt3/src/vue-app/nuxt/plugins.js
rename to packages/nuxt3/src/vue-app/nuxt/plugins.ts
diff --git a/packages/nuxt3/src/vue-app/nuxt/routes.js b/packages/nuxt3/src/vue-app/nuxt/routes.ts
similarity index 100%
rename from packages/nuxt3/src/vue-app/nuxt/routes.js
rename to packages/nuxt3/src/vue-app/nuxt/routes.ts
diff --git a/packages/nuxt3/src/vue-app/plugins/components.js b/packages/nuxt3/src/vue-app/plugins/components.ts
similarity index 100%
rename from packages/nuxt3/src/vue-app/plugins/components.js
rename to packages/nuxt3/src/vue-app/plugins/components.ts
diff --git a/packages/nuxt3/src/vue-app/plugins/legacy.js b/packages/nuxt3/src/vue-app/plugins/legacy.ts
similarity index 100%
rename from packages/nuxt3/src/vue-app/plugins/legacy.js
rename to packages/nuxt3/src/vue-app/plugins/legacy.ts
diff --git a/packages/nuxt3/src/vue-app/plugins/preload.js b/packages/nuxt3/src/vue-app/plugins/preload.ts
similarity index 100%
rename from packages/nuxt3/src/vue-app/plugins/preload.js
rename to packages/nuxt3/src/vue-app/plugins/preload.ts
diff --git a/packages/nuxt3/src/vue-app/plugins/router.js b/packages/nuxt3/src/vue-app/plugins/router.ts
similarity index 100%
rename from packages/nuxt3/src/vue-app/plugins/router.js
rename to packages/nuxt3/src/vue-app/plugins/router.ts
diff --git a/packages/nuxt3/src/vue-app/plugins/state.js b/packages/nuxt3/src/vue-app/plugins/state.ts
similarity index 100%
rename from packages/nuxt3/src/vue-app/plugins/state.js
rename to packages/nuxt3/src/vue-app/plugins/state.ts
diff --git a/packages/nuxt3/src/vue-app/utils.js b/packages/nuxt3/src/vue-app/utils.ts
similarity index 100%
rename from packages/nuxt3/src/vue-app/utils.js
rename to packages/nuxt3/src/vue-app/utils.ts
diff --git a/packages/nuxt3/src/webpack/config/base.ts b/packages/nuxt3/src/webpack/config/base.ts
index 68c358095b..003e609e92 100644
--- a/packages/nuxt3/src/webpack/config/base.ts
+++ b/packages/nuxt3/src/webpack/config/base.ts
@@ -217,7 +217,7 @@ export default class WebpackBaseConfig {
 
     return {
       resolve: {
-        extensions: ['.wasm', '.mjs', '.js', '.json', '.vue', '.jsx'],
+        extensions: ['.wasm', '.mjs', '.js', '.ts', '.json', '.vue', '.jsx', '.tsx'],
         alias: this.alias(),
         modules: webpackModulesDir
       },
diff --git a/packages/nuxt3/src/webpack/config/client.ts b/packages/nuxt3/src/webpack/config/client.ts
index a08c3ad166..d04311b07a 100644
--- a/packages/nuxt3/src/webpack/config/client.ts
+++ b/packages/nuxt3/src/webpack/config/client.ts
@@ -206,7 +206,7 @@ export default class WebpackClientConfig extends WebpackBaseConfig {
 
     // Entry points
     config.entry = Object.assign({}, config.entry, {
-      app: [path.resolve(buildDir, 'entry.client.js')]
+      app: [path.resolve(buildDir, 'entry.client.ts')]
     })
 
     // Add HMR support
diff --git a/packages/nuxt3/src/webpack/config/server.ts b/packages/nuxt3/src/webpack/config/server.ts
index 4c1dd27267..7287913eb4 100644
--- a/packages/nuxt3/src/webpack/config/server.ts
+++ b/packages/nuxt3/src/webpack/config/server.ts
@@ -114,7 +114,7 @@ export default class WebpackServerConfig extends WebpackBaseConfig {
       target: 'node',
       node: false,
       entry: Object.assign({}, config.entry, {
-        app: [path.resolve(this.buildContext.options.buildDir, 'entry.server.js')]
+        app: [path.resolve(this.buildContext.options.buildDir, 'entry.server.ts')]
       }),
       output: Object.assign({}, config.output, {
         filename: 'server.js',