API Tester

Test REST API endpoints

Headers (JSON)

About Api Tester

Api Tester is a free online tool that allows developers to test and debug API endpoints without requiring any installation or setup. It provides a simple interface to send HTTP requests, inspect responses, and validate API functionality in real-time.

How to use Api Tester

1Enter your API endpoint URL in the designated field and select the HTTP method (GET, POST, PUT, DELETE, etc.) you want to use
2Add any required headers, authentication tokens, or query parameters in their respective sections
3Input your request body or payload data if needed, and format it as JSON or form data
4Click the Send button to execute the request and view the response status, headers, and body data instantly

Frequently Asked Questions

Is Api Tester completely free to use?

Yes, Api Tester is completely free to use with no hidden charges, registration requirements, or premium features.

Can I test APIs from different domains?

Yes, Api Tester can test APIs from any domain, though some APIs may have CORS restrictions that could prevent testing from a browser environment.

What HTTP methods does Api Tester support?

Api Tester supports all standard HTTP methods including GET, POST, PUT, DELETE, PATCH, HEAD, and OPTIONS.

Can I save my API requests for later use?

Yes, Api Tester allows you to save your requests locally in your browser for future reference and quick access.

Tips and Tricks

✓Use the Headers section to add authentication tokens like Bearer tokens or API keys to ensure your requests are properly authenticated
✓Format your JSON payload correctly before sending POST or PUT requests to avoid validation errors from the API
✓Check the response status codes to quickly identify issues: 2xx for success, 4xx for client errors, and 5xx for server errors
✓Enable pretty-print formatting to make large JSON responses more readable and easier to debug