How to use CORS Policy Checker
- Start by adding the text you want to check into CORS Policy Checker.
- Set Paste the response headers, Request origin, Request method so the output fits your use case.
- The result is computed live in your browser as you edit the input.
- Use Copy to keep or reuse the result.
About this tool
CORS Policy Checker is a static, client-side tool with no backend. CORS Policy Checker handles your input locally and returns the result instantly, with no sign-up.
It is designed to do one job well and stay out of your way. It behaves the same on desktop and mobile, with nothing stored remotely.
Frequently asked questions
What does CORS Policy Checker do?
Use CORS Policy Checker to check your input without installing anything using the Paste the response headers, Request origin controls; everything happens client-side.
Does CORS Policy Checker cost anything?
No — CORS Policy Checker is completely free, with no sign-up and no hidden limits.
Does CORS Policy Checker upload my data?
No — CORS Policy Checker processes everything locally in your browser, so nothing you enter is uploaded or stored.
Does CORS Policy Checker work on mobile?
Yes — CORS Policy Checker is just a web page and runs on any modern browser, including phones and tablets.