Web
CORS Header Debugger
Paste request/response headers and diagnose CORS mismatches.
Runs in this tab. We do not upload what you paste.
Paste preflight / response headers to explain common CORS failures.
Request headers
Response headers
Diagnosis
- [ok] No CORS mismatches detected from pasted headers
How to use this
- Paste or type into the fields above. Nothing leaves this tab.
- Read the result, then copy it into your editor or ticket.
- For production pipelines, use your normal toolchain. This page is for a fast check.
About CORS Header Debugger
Paste request/response headers and diagnose CORS mismatches. Processing stays in your browser, so drafts, tokens, and configs are not sent to Myrafy.
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