API Tester - Free Online | FunToolX
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API Tester
Send HTTP requests right in your browser. Note: client-side requests are subject to the server’s CORS policy; cross-origin failures are shown honestly.
About this tool
API Tester is a free online tool. Send GET/POST/PUT/DELETE requests right in your browser.
Enter the API address, select the request method (GET, POST, PUT, DELETE, etc.), and add the request headers and request bodies. Supports JSON, form-data, x-www-form-urlencoded and other formats. Click Send to display the response status code, response header, and response body. You can save commonly used request configurations.
Requests are sent using the Fetch API or XMLHttpRequest. Due to browser CORS limitations, some APIs may not be directly accessible (requires the server to allow cross-domain). Responders will automatically format JSON and highlight syntax. You can check the request time and response size.
Suitable for developers to debug APIs and verify whether the interface works properly. It is lighter than Postman and requires no installation. However, due to the browser environment, it is impossible to test APIs that require special certification.
API testing tool, sends HTTP requests to test REST APIs, supports GET/POST/PUT/DELETE and other methods, and views request and response details.