CORS Tester

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

Shareable link: https://cors-test.codehappy.dev/?method=get&origin=https%3A%2F%2Fcors-test.codehappy.dev%2F&url=https%3A%2F%2Fjbrowse.org%2Fcode%2Fjb2%2Fmain%2Ftest_data%2Fvolvox%2Fvolvox.fa.fai

Results

This URL will work correctly with CORS.

Headers

These are the response headers received when making the request.


  access-control-allow-methods: GET, HEAD
access-control-allow-origin: *
access-control-expose-headers: Accept-Ranges, Content-Range, Content-Encoding, Content-Length
access-control-max-age: 3000
cf-cache-status: DYNAMIC
cf-ray: a06f6e04daccfad4-CMH
connection: close
content-length: 43
content-type: binary/octet-stream
date: Fri, 05 Jun 2026 13:12:35 GMT
etag: "36b31c7fe0c868d652ad9dcf61e87682"
last-modified: Mon, 01 Jun 2026 01:31:49 GMT
server: cloudflare
vary: Origin,Access-Control-Request-Headers,Access-Control-Request-Method
via: 1.1 60a4019a365a195cb4f354a7c8fdb39a.cloudfront.net (CloudFront)
x-amz-cf-id: CEBAYFOKL_MRi02nU66Swi3GIOPiBpWsKTztGa6iyIbcIUMwlCp4Zg==
x-amz-cf-pop: CMH68-P4
x-amz-version-id: null
x-cache: Miss from cloudfront

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