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: 9fb350b835ace88e-CMH
connection: keep-alive
content-length: 223
content-type: application/xml
date: Wed, 13 May 2026 17:17:13 GMT
expires: Fri, 12 Jun 2026 17:17:13 GMT
server: cloudflare
set-cookie: __cf_bm=G2B553gW1csjOJWOhgKu_7MP11MajFaRqda.ZjAWbDI-1778692633-1.0.1.1-IF0ZjVSpK0shIZr4h2_QqRG_IjFKxSY29QHgd3QVFx_nX_I0mvgHkxPkrGZCxvuQ2pxEFPsSmK__mFzJ8ayMDRD2e7.xiq0Gq088uSu78SM; path=/; expires=Wed, 13-May-26 17:47:13 GMT; domain=.oaistatic.com; HttpOnly; Secure, _cfuvid=h0Lm31vEI9fso8CRh0CNXTatMZk3zHGIIBybr35VP98-1778692633058-0.0.1.1-604800000; 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: 9d88cb04-e01e-0077-17fc-e236b8000000
x-ms-request-priority: 3

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