Manifest V3 Generator

Manifest V3 (MV3) is the current Chrome Extension platform specification. It replaced Manifest V2 in 2023. Key changes: background pages become service workers, remote code execution is banned, and declarativeNetRequest replaces webRequest for ad blockers.

Yes. The output is always valid, properly formatted JSON that passes JSON validation. It follows Chrome's official MV3 specification.

Only request permissions you actually need. 'activeTab' is safest — it gives temporary access to the current tab only when the user clicks your extension. Avoid broad host permissions like 'https://*/*' unless necessary, as they trigger Chrome Web Store review.

In MV3, 'permissions' are Chrome API permissions (like 'storage', 'tabs'), while 'host_permissions' specify which websites your extension can access (like 'https://example.com/*'). They are now separate fields in MV3.

Yes. Click the 'Download manifest.json' button to save the file directly. Copy it into your extension's root folder.