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CORS Policy Builder

v1.2.1

Generate and review CORS policy templates for strict and least-privilege setups.

Generates CORS policy templates for strict and least-privilege setups — builds Access-Control-Allow-Origin, Access-Control-Allow-Methods, Credentials, and preflight response headers.

How to use
  • →Set your allowed origins (exact or wildcard), methods, and headers.
  • →Enable credentials if your API uses cookies or Authorization headers.
  • →Copy the generated headers as nginx add_header directives or Express middleware config.

Use * for any origin, or comma-separated URLs

Access-Control-Allow-Credentials

Allow cookies and auth headers in cross-origin requests

Show Preflight Example

Preview OPTIONS request/response

HTTP Headers
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET, POST, OPTIONS
Access-Control-Allow-Headers: Content-Type, Accept
Access-Control-Max-Age: 86400