CORS Unlocker

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

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.