How to use Online REST Tester
- Start by entering the URL and any method, headers or body in Online REST Tester.
- Run it, and Online REST Tester issues the request directly from your browser.
- Read the response Online REST Tester shows below — it comes from the API you entered, not from this site.
About this tool
Online REST Tester runs as a page in your browser. Online REST Tester lets you set a method, headers and body, then fires the request straight from your browser and displays what comes back.
Because the call is made by your browser, it follows the same CORS rules as any web page, so some cross-origin APIs may refuse to respond. 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 Online REST Tester?
Online REST Tester sends the HTTP request you configure from your browser to the API you specify and shows the response status, headers and body.
Does Online REST Tester cost anything?
No — Online REST Tester is completely free, with no sign-up and no hidden limits.
Does Online REST Tester send my request anywhere?
Yes — Online REST 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 Online REST Tester call any API from the browser?
Online REST 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 Online REST Tester.