CORS Configuration Generator

Builds a server-side CORS configuration snippet from a small form. Pick a target server (Nginx, Apache, Express.js, or Python/Flask), set allowed origins, methods, headers, credentials, max-age, and exposed headers, then click Generate to produce a copy-pasteable configuration block for that stack.

1. Pick Server Type: Nginx, Apache, Express.js, or Python (Flask). 2. Fill Allowed Origins as a comma-separated list (default *), Allowed Methods (default GET, POST, PUT, DELETE, OPTIONS), Allowed Headers (default Content-Type, Authorization). 3. Toggle Allow Credentials, set Max Age (seconds, default 86400), and optionally list Exposed Headers. 4. Click Generate, then Copy the output.

Nginx emits add_header ... always; lines (one per directive). Apache wraps Header set directives in <IfModule mod_headers.c>. Express.js emits a corsOptions object passed to app.use(cors(corsOptions)) (requires the cors package). Python emits a flask_cors CORS(app, ...) call. Caveat: when multiple origins are listed they are joined with a single space inside the Origin header value, which is invalid for browsers expecting a single origin or a wildcard; configure one origin or * in production.