API Tester

Test REST APIs with GET, POST, PUT, DELETE methods. Send requests, view responses, and debug APIs efficiently.

Request Configuration
Query Parameters
Key Value Description
Headers
Key Value
Request Body
200
OK
Response time: 0ms
{/* Response body will appear here */}
{/* Response headers will appear here */}
Header Value
Request History
{/* History items will be added here dynamically */}

About API Tester

This free online API tester helps you test REST APIs with various HTTP methods. You can configure request parameters, headers, and body, then view the response with status code, headers, and body. It's perfect for API development, testing, and debugging without needing external tools like Postman.

Frequently Asked Questions

An API tester is a tool that allows developers to send HTTP requests to API endpoints and inspect the responses. It's useful for testing API functionality, debugging issues, verifying request/response formats, and ensuring APIs work correctly before integrating them into applications.

This API tester supports all common HTTP methods: GET (retrieve data), POST (create data), PUT (update data), DELETE (remove data), PATCH (partial update), HEAD (get headers only), and OPTIONS (get allowed methods).

Yes, you can add authentication headers in the Headers section. Common authentication methods like Bearer tokens, API keys, and Basic Auth can be configured by adding appropriate headers (e.g., Authorization: Bearer your-token-here).

The main limitation is the browser's CORS (Cross-Origin Resource Sharing) policy, which may block requests to APIs that don't explicitly allow cross-origin requests. For such APIs, you might need to use a browser extension to disable CORS or test from the same origin.