CORS Unlocker

by keroloszakaria2 · Developer Tools

Manifest V3 Free

View in Chrome Web Store Data as of 16 Oct 2026

Development tool for testing APIs by modifying CORS headers. For localhost and staging environments only.

Users

−2 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#227K

#190K among extensions

Version

1.1.0

updated 30 Jul 2026

Users

monthly, 11 months

Latest, 16 Oct 2026: 7 usersMove the mouse over the chart for any month

Ratings count

monthly, 11 months

Latest, 16 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About CORS Unlocker

CORS Unlocker is a developer-focused Chrome extension designed to help you test APIs and frontend integrations by temporarily bypassing Cross-Origin Resource Sharing (CORS) restrictions during development. The extension works locally on your browser and only modifies request headers for the websites you explicitly enable. It does not collect, store, or transmit any personal or sensitive data. Key Features - Toggle CORS rules on/off with a single click - Add custom domains to enable CORS for specific sites - Automatically injects required development headers - Fully transparent – all rules are visible and editable - No ads, no tracking, no background data collection Developed For - Frontend developers - API testers - Web app debugging - Localhost projects - Development environments ⚠️ Important: This extension is intended only for development and debugging purposes. It should not be used on production websites or for bypassing security protections.