CORS / Cross-Origin Proxy
Fix "blocked by CORS policy" in seconds. If you cannot change the target server, use CORSPROXY as a cross-origin proxy.
Also searched as: cross proxy, bypass cors, cors bypass.
Typical error
Access to fetch at 'https://api.example.com' from origin
'http://localhost:3000' has been blocked by CORS policy:
No 'Access-Control-Allow-Origin' header is present on the requested resource.CORSPROXY fetches the target URL server-side and returns it to your browser with the required CORS headers.
If you control the API, fix CORS at the source. If you do not, a cross-origin proxy can unblock development, prototypes, and browser-based integrations.
Use the URL proxy format: ?url= + encodeURIComponent().
Never forward credentials, cookies, or private tokens through a public CORS proxy. Use server-side requests for sensitive workloads.
Need authenticated usage? Create a key in the console.
Targeting the queries we see in Search Console: bypass cors, cross proxy, cross origin proxy, proxy url.
A CORS error happens when the browser blocks a cross-origin request because the server response does not allow your origin. The common message is "blocked by CORS policy".
Best: fix the server CORS config. If you cannot, a CORS proxy can fetch the URL server-side and return it with permissive CORS headers for your browser.
Many sites block datacenter traffic or require additional headers/cookies. See 403 Forbidden troubleshooting .
In practice, yes: people often search for proxy url / url proxy when they want a server to fetch a URL and return it to the browser.