API Test Tool
Test and debug REST APIs online with ease
API Request
Request Headers
Request Body
API Response
No API response yet
Enter an API endpoint and click "Send Request" to test
When to Use API Test Tool
API Development
Test your own APIs during development to verify endpoints, check response formats, and debug integration issues before deployment
API Debugging
Debug API integration issues by testing endpoints, checking error responses, and validating request/response data formats
API Security Testing
Test API security by sending various request types, checking authentication mechanisms, and validating input handling
Performance Testing
Measure API response times, test under different load conditions, and identify performance bottlenecks in your endpoints
API Documentation
Test third-party APIs to understand their functionality, response formats, and integration requirements for documentation
Learning APIs
Explore and learn how different APIs work by testing public endpoints, understanding request/response patterns, and API design principles
Frequently Asked Questions
What is an API testing tool?
An API testing tool is a software application that allows developers and testers to send HTTP requests to API endpoints, examine responses, and verify that APIs work correctly. It helps test REST APIs, check response codes, validate data formats, and debug integration issues without writing custom code.
How do I use this API testing tool?
Using our API testing tool is simple: 1) Enter the API endpoint URL, 2) Select the HTTP method (GET, POST, PUT, DELETE), 3) Add request headers if needed, 4) Include request body for POST/PUT requests, 5) Click 'Send Request' to test the API, 6) Review the response status, headers, and body data.
Is this API testing tool free to use?
Yes, our API testing tool is completely free to use with no registration required. You can test unlimited APIs, send multiple requests, and debug endpoints without any cost. There are no hidden fees, premium features, or usage limits.
What HTTP methods are supported?
Our API testing tool supports all standard HTTP methods including GET (retrieve data), POST (create new resources), PUT (update existing resources), DELETE (remove resources), PATCH (partial updates), and HEAD (get headers only). You can also test custom HTTP methods if your API requires them.
Can I test APIs with authentication?
Yes, you can test authenticated APIs by adding authentication headers. Common methods include Bearer tokens (Authorization: Bearer your-token), API keys (X-API-Key: your-key), Basic authentication, and custom headers. The tool supports all standard authentication methods used in REST APIs.
What response formats are supported?
Our tool supports all common API response formats including JSON (with syntax highlighting and formatting), XML (with proper indentation), plain text, HTML, and binary data. JSON responses are automatically formatted and validated for better readability and debugging.
Can I save my API test requests?
While our tool doesn't store data on servers for privacy reasons, you can save your API configurations by copying the request details or using your browser's local storage. We recommend bookmarking frequently used API endpoints or keeping a text file with your test configurations.
Is it safe to test APIs with this tool?
Yes, our API testing tool is safe to use. All requests are sent directly from your browser to the target API, and we don't store or log any of your API data, credentials, or responses. However, always ensure you have permission to test the APIs you're using and follow the API provider's terms of service.
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