Developer Tools

Free Tools for Extension Developers

Everything you need to build, test, and market your Chrome extension.

Find Extension

Search any Chrome extension by ID or URL. Find removed or unlisted extensions.

Export all reviews from any extension for analysis.

Generate all Chrome extension icon sizes from one image.

Convert your Manifest V2 extension to V3 format.

Create beautiful mockups for Chrome Web Store promo images.

Crop images to exact Chrome Web Store tile sizes.

All tools are free to use. No signup required.