Live deterministic tool
CORS Checker
Fetch a public endpoint and inspect CORS headers for wildcard origins, credentials, and broad method exposure.
What this checks
Access-Control-Allow-Origin
Credentials
Allowed methods
Response status
FAQ
Does this return real evidence?
Yes. The tool runs deterministic network, parser, DNS, or TLS checks against the submitted public target.
Will results be mocked?
No. Tools either run real checks or return a clear unavailable state.