What is HTTP Request Tester?
HTTP Request Tester is a browser-based HTTP client for testing REST APIs. Send HTTP requests (GET, POST, PUT, DELETE, PATCH), set request headers, configure payload bodies, and inspect response status codes, headers, and body payloads.
How to use HTTP Request Tester
Enter the request URL, select HTTP method, configure headers and body payload, and click Send Request. Inspect formatted response data.
Key features
- Supports GET, POST, PUT, DELETE, PATCH HTTP methods
- Custom request headers and JSON body payloads
- Formats response JSON output
- 100% client-side browser execution
Common use cases
- Testing REST API endpoints during backend development
Technical details & standards
Dispatches fetch API network requests client-side. Note: CORS headers must be enabled on target API servers for browser execution.
Frequently asked questions
Why do some API requests fail with CORS errors?
Browsers enforce Cross-Origin Resource Sharing (CORS) rules. Target servers must include Access-Control-Allow-Origin headers.
Is my data safe?
All processing happens entirely in your browser. Your data never leaves your device and is never sent to or stored on a server.
Does it work offline?
Yes. Once the page has loaded, most tools keep working without an internet connection.