API Tester

A web API client to test, analyze and document API calls.

Development
Network
Free

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About

API Tester

Online HTTP client to test and debug your REST endpoints without installing Postman. Build requests in tabs, add parameters, headers, authentication and body, then inspect the response (status, time, size, headers, formatted body). Requests go through our proxy, which avoids browser CORS blocks.

What it does

GET, POST, PUT, PATCH, DELETE, HEAD, OPTIONS across multiple tabs
Parameters, headers, Basic, Bearer or API key authentication
form-data body (with files), x-www-form-urlencoded or raw (JSON, XML, HTML, text)
Response: status, time, size, headers, color-highlighted JSON/XML body
History of the last 50 requests, favorites and copy as cURL

Frequently asked questions

Which HTTP methods are supported?

GET, POST, PUT, PATCH, DELETE, HEAD and OPTIONS. For each request you set query string parameters, headers, authentication and, except for GET and HEAD, a form-data, urlencoded or raw body.

Do CORS errors block my requests?

No. The request is executed by our server-side proxy, which returns the response to you: browser CORS restrictions therefore do not apply. In return, headers and body pass through this proxy and only APIs publicly reachable on the Internet can be called: avoid sending production secrets.

Can I save my requests?

Yes, in your browser: the last 50 requests are kept in the history and you can mark the most useful ones as favorites. Each request can also be copied as a cURL command to replay it in a terminal or share it.

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