About API Tester
Test REST APIs directly in your browser with a Postman-like interface. Send HTTP requests, configure headers and authentication, and inspect responses with syntax highlighting. No installation needed.
Key Features
- -Support for GET, POST, PUT, PATCH, DELETE methods
- -Custom headers and authentication options
- -Request body editor with JSON support
- -Response viewer with syntax highlighting
- -Request history and saved collections
- -Multi-tab interface for parallel testing
Use Cases
API Development
Test your endpoints during development without switching to external desktop tools.
Debugging
Inspect response headers, status codes, and body content to diagnose API issues quickly.
Integration Testing
Verify third-party API responses and data formats before writing integration code.
API Documentation
Quickly test API examples from documentation to verify they work as described.
Frequently Asked Questions
Is this like Postman?▾
It provides similar core functionality for testing HTTP requests directly in your browser. No installation or account required.
Are there CORS limitations?▾
Browser-based API testing is subject to CORS policies. APIs that do not allow cross-origin requests may return errors. For those cases, test from your server or use a CORS proxy.
Is my API key safe?▾
All requests are made directly from your browser. API keys and tokens are not stored on any server. Clear your browser data to remove saved request history.
Tips & Best Practices
- -Use the Collections feature to organize related API endpoints
- -Check response headers for rate limit information
- -Test error cases by sending invalid data to verify API error handling