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CORS Headers Generator
Generate Cross-Origin Resource Sharing headers for API and resource access control.
Access-Control-Allow-Origin: https://app.example.com
Vary: Origin
Access-Control-Allow-Methods: GET, POST, OPTIONS
Access-Control-Allow-Headers: Content-Type, Authorization
Access-Control-Max-Age: 600How to use this tool
Follow these steps to get the most out of the CORS Headers Generator.
Enter your accurate data in the provided form fields.
Review all configuration options and settings.
Click the generate or proceed button to execute.
Copy, download, or implement the professional output.
In depth
What CORS Headers Do
CORS headers tell browsers which other origins may read responses from your API. They relax the browser's same-origin policy for the origins you list; they don't stop non-browser clients, so keep authentication on the API itself.
CORS and SEO
CORS is not a ranking signal, and neither is HSTS; HTTPS itself is a lightweight one. Set CORS for your API's security and functionality, and keep Access-Control-Allow-Origin as narrow as possible.
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