CORS Tester
Test CORS headers on any API endpoint. Check Access-Control-Allow-Origin, allowed methods, and headers in real-time from your browser.
About the CORS Tester
Test CORS headers on any API endpoint. Check Access-Control-Allow-Origin, allowed methods, and headers in real-time from your browser.
CORS Tester is a free browser-based tool on QuickFnd. Test CORS headers on any API endpoint. Check Access-Control-Allow-Origin, allowed methods, and headers in real-time from your browser. No installation or account required — runs entirely in your browser on desktop and mobile.
- Type
- Tool
- Runs in
- Your browser — no account, no install
- Price
- Free
- Privacy
- Inputs stay on your device unless the tool says otherwise
Frequently asked questions
It makes a real browser fetch request to your URL and inspects the Access-Control-Allow-Origin, Access-Control-Allow-Methods, and other CORS response headers.
The server either doesn't send CORS headers or doesn't allow your origin. You need to configure CORS on the server side.
Yes — GET, POST, PUT, DELETE, PATCH, and OPTIONS are all supported.
No. The request goes directly from your browser to the target URL. QuickFnd doesn't proxy or store anything.
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