Chrome Extension Manifest Generator
Generate a valid Chrome extension manifest.json in seconds with our free Chrome extension manifest generator. Customize permissions and download instantly.
About Chrome Extension Manifest
The Chrome Extension Manifest Generator helps developers build a compliant manifest.json file for Google Chrome extensions. Instead of hand-coding configuration files and cross-checking documentation, you can configure extension metadata, browser permissions, background workers, and action popups through a clean visual interface.
Built for modern Manifest V3 requirements, this tool runs entirely on your device with no installation or registration required. Configure your project parameters, verify the generated JSON code in real time, and copy or download the file directly into your extension directory.
Key features
- Supports the latest Chrome Manifest V3 specifications
- Preconfigured permission selector for common extension APIs
- Configures background service workers and content scripts
- Real-time JSON preview with valid schema structure
- Instant copy to clipboard and file download options
- Runs entirely in your browser without remote data storage
How to use Chrome Extension Manifest
- Enter basic metadata such as extension name, version, and description.
- Select required Chrome API permissions and host match patterns.
- Define action parameters, including default popup and icon paths.
- Configure background service workers and content script settings if needed.
- Review the generated JSON and click to copy or download the manifest.json file.
Who is it for?
- Web developers starting new Chrome extension projects from scratch
- Engineers migrating legacy Manifest V2 extensions to Manifest V3
- Students and educators learning browser extension architecture
- Rapid prototyping of browser add-ons without manual JSON syntax errors
Frequently asked questions
Does this tool support Chrome Manifest V3?
Yes, the generator formats output specifically for Manifest V3, including current standards for background service workers and declarative permissions.
Do I need to sign up or install anything to use this generator?
No, the tool is completely free to use directly in your browser without any account creation or software download.
Is my extension configuration sent to a remote server?
No, all file generation and processing occurs locally within your web browser, ensuring your extension details remain private.
How do I use the generated manifest.json file?
Save the file into your extension's root directory, open chrome://extensions in Google Chrome, turn on Developer mode, and click Load unpacked to test your extension.
Can I define custom host permissions for web requests?
Yes, you can input specific URL match patterns under the host permissions section to allow your extension to interact with targeted domains.