How to use Free REST API Tester
- Start by entering the URL and any method, headers or body in Free REST API Tester.
- Run it, and Free REST API Tester issues the request directly from your browser.
- See the response from the API you entered; Free REST API Tester only displays what comes back.
About this tool
Free REST API Tester runs in your browser with no backend of its own. Free REST API Tester lets you set a method, headers and body, then fires the request straight from your browser and displays what comes back.
It is a thin client around the browser fetch API — no proxy and no stored credentials, just the request you configure. The request is sent from your browser straight to the API you name; this site has no backend and never receives it, though that server and your network can see it. Cross-origin calls follow the browser's CORS rules, and a connection is required.
Frequently asked questions
How do I use Free REST API Tester?
Free REST API Tester sends the HTTP request you configure from your browser to the API you specify and shows the response status, headers and body.
Does Free REST API Tester cost anything?
No — Free REST API Tester is completely free, with no sign-up and no hidden limits.
Does Free REST API Tester send my request anywhere?
Yes — Free REST API Tester sends the request from your browser directly to the URL you enter. This site has no backend and never receives it, but the target server and your network do, and cross-origin calls follow browser CORS rules.
Can Free REST API Tester call any API from the browser?
Free REST API Tester can call any endpoint your browser is allowed to reach, but cross-origin APIs must send permissive CORS headers or the browser will block the response — that is a browser rule, not a limit of Free REST API Tester.