API Tester

Test API endpoints with GET, POST, PUT, DELETE

Headers (one per line, Key: Value)

Note: Requests are made from your browser. CORS restrictions may prevent some APIs from responding.

How It Works

Test REST APIs directly from your browser with our free API tester. Send GET, POST, PUT, PATCH, and DELETE requests with custom headers and body. View response status, headers, and body with formatting.

API testing is essential for development and debugging. Our tool lets you send HTTP requests and inspect responses without installing Postman or similar software. JSON responses are automatically formatted.

Frequently Asked Questions

Will all APIs work?

Requests are made from your browser, so CORS restrictions apply. APIs that don't include appropriate CORS headers won't respond. For unrestricted testing, you'd need a desktop tool or proxy.

Can I send authentication headers?

Yes, add any headers in the headers section, including Authorization, Bearer tokens, API keys, and custom headers.