HTTP Request Tester

Send a lightweight HTTP request from your browser and inspect the status, headers and body.

Request headers (key: value, one per line)Request body (for POST / PUT)

CORS note: Browsers block requests to servers that do not allow cross-origin calls. Public test APIs work; private or internal endpoints usually need a proxy or a tool such as Postman. Nothing here replaces a proper API client for real work.

What to look at in the response

Status line — the exact code and reason phrase.
Response headers — particularly Content-Type, Content-Length and cache headers.
Body — pretty-printed when it is JSON so you can verify fields directly.

Quick checks you can run

Does the endpoint return the expected status code?
Does Content-Type match the actual body?
Does an invalid request return a structured error body?
Are sensitive headers reflected back to the client?

Pair this with the API Response Viewer to study saved responses offline.