Test REST API endpoints with custom headers, methods, and request bodies. See response status, timing, headers, and body instantly.
The Simple API Tester by TooliFyra is a free online tool that lets you test REST API endpoints directly from your browser. It supports all common HTTP methods (GET, POST, PUT, DELETE, PATCH), custom request headers, and JSON request bodies. You get instant feedback including response status codes, response time, response headers, and formatted response body.
This tool is perfect for developers, QA engineers, and anyone who needs to quickly verify API endpoints without installing additional software or browser extensions.
The free online API tester eliminates the need for installing desktop applications like Postman or Insomnia for quick API checks. It runs entirely in your browser, making it accessible from any device with an internet connection. The tool displays formatted JSON responses, response headers, and timing data, giving you all the information you need to debug and verify API endpoints.
Web Developers: Quickly test API endpoints during development without switching to a separate tool.
Backend Engineers: Verify API responses, status codes, and headers for debugging.
QA Engineers: Perform basic API validation tests for endpoints under test.
Students & Learners: Practice and understand REST API concepts with hands-on testing.
TooliFyra provides a fast, reliable, and free API tester that works entirely in your browser. No sign-ups, no installations, no data collection. Just enter a URL, hit send, and get results instantly. Essential developer tools should be simple and accessible to everyone.
Yes, completely free with no usage limits, sign-ups, or hidden charges. Use it as many times as you need.
Yes. You can add any custom headers including Authorization tokens, API keys, and Bearer tokens using the headers editor.
Since requests are made from your browser, CORS (Cross-Origin Resource Sharing) policies of the target server may apply. If a server doesn't allow cross-origin requests, the tool may not be able to reach it. This is a browser security restriction, not a tool limitation.
No. All requests are made directly from your browser using the Fetch API. No data is sent to or stored on TooliFyra servers. Your API keys and data remain private.
This tool is designed for RESTful APIs using standard HTTP methods. For GraphQL, SOAP, or WebSocket testing, you may need specialized tools.