What is a CORS tester?

A CORS tester sends an HTTP request with an Origin header to your URL and shows the Access-Control-* response headers. It helps you verify whether a given origin would be allowed by the server's CORS policy.

Is the CORS tester free?

Yes. This CORS tester is free to use with no signup required. We use a fixed origin (https://www.scryn.cloud) for the test request.

Free Tool

CORS Tester

Test how a server responds to a cross-origin request. We send an Origin header and show the CORS response headers.

Use this free CORS tester to check how a server handles cross-origin requests. See Access-Control-Allow-Origin and related headers so you can debug CORS issues or verify your API’s CORS configuration.

Frequently asked questions

What is a CORS tester?: A CORS tester sends an HTTP request with an Origin header to your URL and shows the Access-Control-* response headers. It helps you verify whether a given origin would be allowed by the server's CORS policy.
Is the CORS tester free?: Yes. This CORS tester is free to use with no signup required. We use a fixed origin (https://www.scryn.cloud) for the test request.