CORS Tester

Use this little website to test if a URL is setup correctly to work with CORS.




If your CORS setup is not using a wildcard then this should be a domain that matches your AllowedOrigins


Shareable link:

Results

This URL will work correctly with CORS.

Headers

These are the response headers received when making the request.

accept-ranges: bytes
access-control-allow-origin: *
cache-control: max-age=14400
cf-cache-status: MISS
cf-ray: 9bfd9da1d1a0e1db-ORD
connection: keep-alive
content-length: 103736
content-type: image/jpeg
date: Sun, 18 Jan 2026 11:05:10 GMT
etag: "6472adb4-19538"
last-modified: Sun, 28 May 2023 01:26:12 GMT
server: cloudflare

CORS tester was built by @mscccc. The code is available on GitHub. Sponsored by HTML/CSS to Image.