HTTP Request Builder

About this tool

This is a lightweight "Postman-in-your-browser" for building and sending one-off HTTP requests without installing anything. Pick a method, set the URL, add any headers you need, and (for POST/PUT/PATCH) write a body — then send it and see exactly what came back: status, headers and body.

Because this runs entirely as a plain client-side fetch() call from this page — not through a server-side proxy — the same browser CORS (Cross-Origin Resource Sharing) rules apply as on any other webpage. Many third-party APIs don't allow browser-based requests from arbitrary origins, so a blocked or failed request here usually means the server simply doesn't permit it, not that something is broken. For APIs that don't allow browser access, a command-line tool like curl or an app like Postman (which aren't bound by browser CORS) will usually get further.