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.

access-control-allow-origin: *
access-control-expose-headers: content-length
cache-control: public, max-age=2592000
cf-cache-status: MISS
cf-ray: 9c7acb24a1c1e88e-CMH
connection: keep-alive
content-length: 223
content-type: application/xml
date: Mon, 02 Feb 2026 15:41:35 GMT
expires: Wed, 04 Mar 2026 15:41:35 GMT
server: cloudflare
set-cookie: __cf_bm=FTrEW6ZUeZZJNMEnPzqJpy7mj3LaQXvOpQ8nBfQruyI-1770046895-1.0.1.1-UQjYK89vj2V1JQpOUllzO16LA2Ms2BZ5zFKO9NMV1giYScRrCx073CCvvg9iUdCB7Ao8ULfHQUAWgnfc1PZPH2eRpclQfaARhaRymYSV6xc; path=/; expires=Mon, 02-Feb-26 16:11:35 GMT; domain=.oaistatic.com; HttpOnly; Secure, _cfuvid=_3cNlEzXcp_XZc8Hc733Lu4F_LyZt5wrMys.OW_tnJg-1770046895080-0.0.1.1-604800000; path=/; domain=.oaistatic.com; HttpOnly; Secure; SameSite=None
strict-transport-security: max-age=31536000; includeSubDomains; preload
timing-allow-origin: https://chatgpt.com
x-content-type-options: nosniff
x-ms-request-id: c1e8b802-401e-001d-395a-945fed000000

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