API Tester
Test REST APIs with different methods and headers.
API Tester
Test REST APIs with different methods and headers.
GET
Headers (JSON)
About API Tester
This free API Tester tool helps you Test REST APIs with different methods and headers.. No signup required.
Key features
- Fast, simple, and ready to use.
- Live preview to validate results.
- Copy output with one click.
- Client-side processing for better privacy (most tools).
Use cases
- Daily development and debugging
- Data conversion and cleanup
- Quick validation and troubleshooting
- Documentation and learning
Frequently Asked Questions
What is API Tester?
API Tester helps you do this task online and get results instantly.
Is my data uploaded?
Most tools run locally in your browser. For tools that require network requests, the UI will indicate it.
Why is the result unexpected?
Double-check input format and options. Environment differences (timezone/encoding) can also affect outputs.
Is it free?
Yes. No signup required.