Manifest.json Generator

Generate a valid Manifest V3 file for your Chrome extension. Fill in the basics, pick your permissions, and copy the result.

Extension Name

Version

Description

Permissions

activeTab

Access current tab when user invokes the extension

storage

Store and retrieve data locally

tabs

Read tab URLs, titles, and manage tabs

alarms

Schedule periodic tasks

notifications

Show system notifications

contextMenus

Add items to the right-click context menu

scripting

Inject scripts into web pages

sidePanel

Use the side panel API

Icon Paths

Output

{
  "manifest_version": 3,
  "name": "My Extension",
  "version": "1.0.0",
  "description": "A Chrome extension.",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "background": {
    "service_worker": "background.js"
  }
}

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