DEVELOPER TOOL · CLIENT-SIDE
API Tester
Test REST APIs with GET, POST, PUT, DELETE and more. View response status, headers, and body. Runs entirely in your browser — nothing is uploaded.
Note: Some APIs may block browser requests due to CORS restrictions. Use APIs that allow cross-origin requests.
Request
Response
How API Testing Works
This tool sends HTTP requests using the browser's fetch API. The request is made directly from your browser to the target server. Responses are displayed with status codes, headers, and formatted body content.
Any method
Supports GET, POST, PUT, DELETE, PATCH and all standard HTTP methods.
Full response
View status code, response headers, and formatted body content.
100% private
Requests go directly from your browser. Nothing is stored or logged.
Frequently Asked Questions
What is an API tester?
An API tester is a tool that sends HTTP requests to APIs and displays the responses. It allows developers to test endpoints, debug issues, and verify API functionality without writing code.
What is CORS?
CORS (Cross-Origin Resource Sharing) is a browser security feature that restricts web pages from making requests to a different domain. Some APIs may block requests from browser-based tools. Use a server-side proxy or API with CORS enabled for testing.
What HTTP methods are supported?
This tool supports GET (retrieve data), POST (create data), PUT (update data), DELETE (remove data), and PATCH (partial update). The most common are GET and POST.