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CORS Headers Builder - Free Online Developer Tool | IconVault

Build CORS configs visually: origins, methods, credentials. Get Express, Nginx, Apache and Cloudflare code. Free.

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CORS Headers Builder

Generate CORS configs and server code

5 of 5 free uses left

Start from a preset

Allowed origins (one per line, or *)

Allowed methods

Allowed request headers

Exposed headers (optional)

Allow credentials

Cookies and Authorization headers

Preflight cache (max-age, seconds): 86400

5 of 5 free generations left.

Your CORS config appears here

Pick a preset or tune the options, then generate copy-paste server code.

About this tool

IconVault's CORS Headers Builder turns cross-origin configuration into a visual form: pick allowed origins, toggle HTTP methods, set allowed and exposed headers, flip credentials on or off, and tune the preflight cache. Start from presets like Public API, Single-page app or Locked down.

It generates copy-paste code for Express (cors middleware), raw response headers, Nginx, Apache and Cloudflare Workers, and warns you about real footguns like combining wildcard origins with credentials. Free and runs fully in your browser.

Frequently asked questions

Popular searches

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