API Tester
Test any REST API in your browser, free. Send GET, POST, PUT and DELETE requests with custom headers and body, and view status, time and response.
Requests run from your browser. Some APIs block cross-origin browser calls (CORS) — those need a server or a CORS-enabled endpoint.
About API Tester
API Tester is a free Becoderr tool. It needs no sign-up, runs fast and privately, and works right in your browser for most tasks. For the few server-based tools, your files are processed in memory and discarded immediately after the operation.
Frequently asked questions
Is this tool free to use?
Yes. Every tool on Becoderr is completely free with no sign-up required. Signed-in users get higher file-size limits.
Are my files safe?
Yes. Browser-based tools process files entirely on your device; nothing is uploaded. Server-based tools process files in memory and discard them immediately after the operation.
Is there a file size limit?
Server-based tools accept up to 5 MB for anonymous users and 50 MB when signed in. Browser-based tools are limited only by your device.
Do I need to install anything?
No. Becoderr runs entirely in your web browser on any device: Windows, macOS, Linux, Android or iOS.