diff --git a/packages/vite/schemas/manifest.schema.json b/packages/vite/schemas/manifest.schema.json
new file mode 100644
index 00000000000000..6ba533a6cc42a7
--- /dev/null
+++ b/packages/vite/schemas/manifest.schema.json
@@ -0,0 +1,68 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://vitejs.dev/schemas/manifest.json",
+  "title": "Vite Manifest",
+  "type": "object",
+  "patternProperties": {
+    "^.+$": {
+      "$ref": "#/$defs/chunk"
+    }
+  },
+  "$defs": {
+    "chunk": {
+      "type": "object",
+      "properties": {
+        "src": {
+          "type": "string",
+          "description": "Source file of the chunk."
+        },
+        "file": {
+          "type": "string",
+          "description": "A JS filename, relative to the outDir."
+        },
+        "css": {
+          "type": "array",
+          "description": "CSS files imported by the chunk.",
+          "items": {
+            "type": "string",
+            "description": "A CSS filename, relative to the outDir."
+          }
+        },
+        "assets": {
+          "type": "array",
+          "description": "Assets imported by the chunk.",
+          "items": {
+            "type": "string",
+            "description": "An asset filename, relative to the outDir."
+          }
+        },
+        "isEntry": {
+          "type": "boolean",
+          "description": "Whether the chunk is an entry."
+        },
+        "isDynamicEntry": {
+          "type": "boolean",
+          "description": "Whether the chunk is a dynamic entry."
+        },
+        "imports": {
+          "type": "array",
+          "description": "Imports of the chunk.",
+          "items": {
+            "type": "string",
+            "description": "A key for an existing JS entry in the manifest."
+          }
+        },
+        "dynamicImports": {
+          "type": "array",
+          "description": "Dynamic imports of the chunk.",
+          "items": {
+            "type": "string",
+            "description": "A key for an existing JS entry in the manifest."
+          }
+        }
+      },
+      "additionalProperties": true,
+      "required": ["file"]
+    }
+  }
+}
diff --git a/packages/vite/schemas/ssr-manifest.schema.json b/packages/vite/schemas/ssr-manifest.schema.json
new file mode 100644
index 00000000000000..b5cd4eda597a4c
--- /dev/null
+++ b/packages/vite/schemas/ssr-manifest.schema.json
@@ -0,0 +1,14 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://vitejs.dev/schemas/ssr-manifest.json",
+  "title": "Vite SSR Manifest",
+  "type": "object",
+  "patternProperties": {
+    "^.+$": {
+      "type": "array",
+      "items": {
+        "type": "string"
+      }
+    }
+  }
+}
diff --git a/playground/backend-integration/__tests__/manifests/additionalProperties.manifest.json b/playground/backend-integration/__tests__/manifests/additionalProperties.manifest.json
new file mode 100644
index 00000000000000..32284b81dd8a01
--- /dev/null
+++ b/playground/backend-integration/__tests__/manifests/additionalProperties.manifest.json
@@ -0,0 +1,6 @@
+{
+  "main.js": {
+    "file": "test",
+    "customProperty": "custom value"
+  }
+}
diff --git a/playground/backend-integration/__tests__/manifests/invalid.manifest.json b/playground/backend-integration/__tests__/manifests/invalid.manifest.json
new file mode 100644
index 00000000000000..84872a5f4e8577
--- /dev/null
+++ b/playground/backend-integration/__tests__/manifests/invalid.manifest.json
@@ -0,0 +1,18 @@
+{
+  "main.js": {
+    "src": "main.js",
+    "isEntry": true,
+    "dynamicImports": ["views/foo.js"],
+    "css": ["assets/main.b82dbe22.css"],
+    "assets": ["assets/asset.0ab0f9cd.png"]
+  },
+  "views/foo.js": {
+    "file": "assets/foo.869aea0d.js",
+    "src": "views/foo.js",
+    "isDynamicEntry": true,
+    "imports": ["_shared.83069a53.js"]
+  },
+  "_shared.83069a53.js": {
+    "file": "assets/shared.83069a53.js"
+  }
+}
diff --git a/playground/backend-integration/__tests__/manifests/manifest-schema.spec.ts b/playground/backend-integration/__tests__/manifests/manifest-schema.spec.ts
new file mode 100644
index 00000000000000..ed9705d8c06ce9
--- /dev/null
+++ b/playground/backend-integration/__tests__/manifests/manifest-schema.spec.ts
@@ -0,0 +1,25 @@
+import Ajv2020 from 'ajv/dist/2020'
+
+const schema = require('../../../../packages/vite/schemas/manifest.schema.json')
+const ajv = new Ajv2020()
+const validate = ajv.compile(schema)
+
+describe('manifest json schema', () => {
+  test('valid manifest validates against manifest schema', () => {
+    const manifest = require('./valid.manifest.json')
+    const result = validate(manifest)
+    expect(result).toBeTruthy()
+  })
+
+  test('invalid manifest does not validate against manifest schema', () => {
+    const manifest = require('./invalid.manifest.json')
+    const result = validate(manifest)
+    expect(result).toBeFalsy()
+  })
+
+  test('manifest chunks support additional properties', () => {
+    const manifest = require('./additionalProperties.manifest.json')
+    const result = validate(manifest)
+    expect(result).toBeTruthy()
+  })
+})
diff --git a/playground/backend-integration/__tests__/manifests/valid.manifest.json b/playground/backend-integration/__tests__/manifests/valid.manifest.json
new file mode 100644
index 00000000000000..3d9ba04e076f3c
--- /dev/null
+++ b/playground/backend-integration/__tests__/manifests/valid.manifest.json
@@ -0,0 +1,19 @@
+{
+  "main.js": {
+    "file": "assets/main.4889e940.js",
+    "src": "main.js",
+    "isEntry": true,
+    "dynamicImports": ["views/foo.js"],
+    "css": ["assets/main.b82dbe22.css"],
+    "assets": ["assets/asset.0ab0f9cd.png"]
+  },
+  "views/foo.js": {
+    "file": "assets/foo.869aea0d.js",
+    "src": "views/foo.js",
+    "isDynamicEntry": true,
+    "imports": ["_shared.83069a53.js"]
+  },
+  "_shared.83069a53.js": {
+    "file": "assets/shared.83069a53.js"
+  }
+}
diff --git a/playground/backend-integration/package.json b/playground/backend-integration/package.json
index ead0c3a70d8e10..1a9bbcbf9db3a2 100644
--- a/playground/backend-integration/package.json
+++ b/playground/backend-integration/package.json
@@ -11,6 +11,7 @@
   "devDependencies": {
     "sass": "^1.53.0",
     "tailwindcss": "^3.1.4",
+    "ajv": "^8.11.0",
     "fast-glob": "^3.2.11"
   }
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 404ceea6b8f837..a2ebdaacd64678 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -360,10 +360,12 @@ importers:
 
   playground/backend-integration:
     specifiers:
+      ajv: ^8.11.0
       fast-glob: ^3.2.11
       sass: ^1.53.0
       tailwindcss: ^3.1.4
     devDependencies:
+      ajv: 8.11.0
       fast-glob: 3.2.11
       sass: 1.53.0
       tailwindcss: 3.1.4
@@ -2920,6 +2922,15 @@ packages:
       uri-js: 4.4.1
     dev: true
 
+  /ajv/8.11.0:
+    resolution: {integrity: sha512-wGgprdCvMalC0BztXvitD2hC04YffAvtsUn93JbGXYLAtCUO4xd17mCCZQxUOItiBwZvJScWo8NIvQMQ71rdpg==}
+    dependencies:
+      fast-deep-equal: 3.1.3
+      json-schema-traverse: 1.0.0
+      require-from-string: 2.0.2
+      uri-js: 4.4.1
+    dev: true
+
   /algoliasearch/4.13.1:
     resolution: {integrity: sha512-dtHUSE0caWTCE7liE1xaL+19AFf6kWEcyn76uhcitWpntqvicFHXKFoZe5JJcv9whQOTRM6+B8qJz6sFj+rDJA==}
     dependencies:
@@ -5690,6 +5701,10 @@ packages:
     resolution: {integrity: sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg==}
     dev: true
 
+  /json-schema-traverse/1.0.0:
+    resolution: {integrity: sha512-NM8/P9n3XjXhIZn1lLhkFaACTOURQXjWhV4BA/RnOv8xvgqtqpAX9IO4mRQxSx1Rlo4tqzeqb0sOlruaOy3dug==}
+    dev: true
+
   /json-stable-stringify-without-jsonify/1.0.1:
     resolution: {integrity: sha512-Bdboy+l7tA3OGW6FjyFHWkP5LuByj1Tk33Ljyq0axyzdk9//JSi2u3fP1QSmd1KNwq6VOKYGlAu87CisVir6Pw==}
     dev: true
@@ -7287,6 +7302,11 @@ packages:
     engines: {node: '>=0.10.0'}
     dev: true
 
+  /require-from-string/2.0.2:
+    resolution: {integrity: sha512-Xf0nWe6RseziFMu+Ap9biiUbmplq6S9/p+7w7YXP/JBHhrUDDUhwa+vANyubuqfZWTveU//DYVGsDG7RKL/vEw==}
+    engines: {node: '>=0.10.0'}
+    dev: true
+
   /requires-port/1.0.0:
     resolution: {integrity: sha1-kl0mAdOaxIXgkc8NpcbmlNw9yv8=}
     dev: true