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%2Fwww.doerfelverse.com%2Ftracks%2Fmario-kurt.mp3
These are the response headers received when making the request.
accept-ranges: bytes
access-control-allow-methods: GET, POST, OPTIONS
access-control-allow-origin: *
cache-control: max-age=172800
cf-cache-status: MISS
cf-ray: 9b17e11ca3d561ab-ORD
connection: keep-alive
content-length: 7528320
content-type: audio/mpeg
date: Sun, 21 Dec 2025 13:55:50 GMT
etag: "72df80-60bb90cdb7953"
expires: Tue, 23 Dec 2025 13:55:50 GMT
last-modified: Tue, 05 Dec 2023 01:21:12 GMT
server: cloudflare
vary: User-Agent
CORS tester was built by @mscccc. The code is available on GitHub. Sponsored by HTML/CSS to Image.