HTTP & Security Header Tools

CORS Generator

CORS Generator builds Access-Control-* CORS headers in your browser for raw, Nginx, Apache, or Express output, with origin, methods, credentials.

Client-sideRuns entirely in your browser — your data never leaves your device.

CORS Generator is a free HTTP & Security Header Tools utility that runs entirely in your browser — nothing you enter is uploaded.

CORS headers

How to use CORS Generator

  1. Type or paste your text into CORS Generator's input area.
  2. Set Allowed origin, Allowed methods, Allowed headers so the output fits your use case.
  3. CORS Generator updates the output automatically as you type.
  4. Use Copy to keep or reuse the result.

About this tool

CORS Generator is a static, client-side tool with no backend. CORS Generator handles your input locally and returns the result instantly, with no sign-up.

Because it runs on your device, it is fast and private and works offline once loaded. Your input never leaves the page, and no account or install is required.

Frequently asked questions

What is CORS Generator for?

CORS Generator runs entirely on your device: add your input using the Allowed origin, Allowed methods controls, and it generates it locally in real time.

Does CORS Generator cost anything?

No — CORS Generator is completely free, with no sign-up and no hidden limits.

Where is my data processed by CORS Generator?

Entirely in your browser — CORS Generator keeps your data on your own machine and sends nothing anywhere.

Does CORS Generator work on mobile?

Yes — CORS Generator is just a web page and runs on any modern browser, including phones and tablets.

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