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-headers: Content-Type
access-control-allow-methods: GET, OPTIONS
access-control-allow-origin: *
age: 0
alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
cache-status: "Netlify Edge"; fwd=miss
cf-cache-status: DYNAMIC
cf-ray: 9c0c2dde130561ab-ORD
connection: keep-alive
content-length: 390
content-type: application/json; charset=utf-8
date: Tue, 20 Jan 2026 05:30:19 GMT
netlify-vary: query
server: cloudflare
strict-transport-security: max-age=31536000
x-cloud-trace-context: 019bd9e1e72e8bb9d7c5fc5aafe46fe3;o=1
x-nf-request-id: 01KFCY3SSEHEWXFHFWBAQY8VZ3

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