⚡ V3 Manifest Builder

Complete Cross-browser Extension manifest.json (v3) generator with all official fields

Configuration

Basic Information
Maximum 45 characters for Chrome Web Store
Format: 1-4 dot-separated integers (e.g., 1.0.0.1)
Maximum 132 characters
Max 12 characters
Display version
Icons
Browser Action
Action Icon
Background Service Worker
Content Scripts
Permissions
Optional Permissions
Host Permissions
One URL pattern per line
Optional Host Permissions
One URL pattern per line
Options Page
Options UI (Recommended)
Side Panel
DevTools
Web Accessible Resources
Omnibox
Keyword to trigger your extension in address bar
Commands (Keyboard Shortcuts)
Declarative Net Request
Externally Connectable
One URL pattern per line
One extension ID per line
Chrome URL Overrides
Content Security Policy
Sandbox
One page path per line
Storage
OAuth2
One scope per line
Cross-Origin Policies
Advanced Settings
Required if _locales directory exists
Public key for consistent extension ID
Text-to-Speech Engine
Requirements

Generated manifest.json

{
  "manifest_version": 3,
  "name": "My Extension",
  "version": "1.0.0",
  "description": "Extension description"
                }
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