CORS Header Builder
Build Access-Control-Allow-Origin header values.
Sensitive data: Anything you enter is processed in your browser only. It is never uploaded or logged on a server.
Reference Guide
Security tool — all processing runs locally in your browser. No data is sent to a server.
Operation: cors-builder
Paste input, click Run, and copy the result. For two-input tools, fill both fields before running.
Example Input
https://devpipe.dev
A sample loads automatically when you open this tool. Use Load Sample to reset it.