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: 98fd7a9ba04910ec-ORD
connection: keep-alive
content-length: 223
content-type: application/xml
date: Fri, 17 Oct 2025 05:43:32 GMT
expires: Sun, 16 Nov 2025 05:43:32 GMT
server: cloudflare
set-cookie: __cf_bm=fo3GwLOjwrvSno_YJhhFqdT6amdMsUtaiaLX.2YlYq8-1760679812-1.0.1.1-9Qmjy77Od.6_HSYIcopZXgXfNeEG48CShVhxSjF_kwhxVGfAiNhoGMRoh9BRz0ma2Ee0h.hwVJ87S1PjxJ4kKCajImlvfAz7ijFjZFGizvo; path=/; expires=Fri, 17-Oct-25 06:13:32 GMT; domain=.oaistatic.com; HttpOnly; Secure, _cfuvid=sc_VVUwlpn1nwlV9fNCYPq4.86_yYj_hhaVbgdOUe0k-1760679812635-0.0.1.1-604800000; 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: fdf18eb8-a01e-00b6-6028-3f88ff000000

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