API Request Builder
Build and send HTTP requests from your browser. Inspect responses, copy cURL commands.
cURL Command
curl -X GET 'https://jsonplaceholder.typicode.com/todos/1' \ -H 'Content-Type: application/json'
Requests are sent directly from your browser. CORS restrictions apply — APIs must allow cross-origin requests or use a CORS-enabled endpoint.
Browser-Based API Request Builder
Configure HTTP requests with method, URL, query parameters, headers, and a JSON body editor. Responses are displayed with status code, timing, response headers, and a formatted body view. Requests go directly to the target API — no proxy, no data storage.
Frequently Asked Questions
- Does this tool send requests through a proxy?
- No. Requests are sent directly from your browser using the native Fetch API. There is no backend proxy — your request goes straight to the target API.
- Why do some requests fail with a CORS error?
- CORS (Cross-Origin Resource Sharing) is a browser security feature. If the API does not include the appropriate CORS headers (Access-Control-Allow-Origin), the browser will block the response. This is a limitation of browser-based HTTP clients — server-side tools like Postman's desktop agent bypass CORS.
- Is my API data stored anywhere?
- No. Request data, headers, and response bodies are only kept in memory for the current session. Nothing is stored locally or sent to any server.
- What is the cURL command for?
- The generated cURL command lets you reproduce the exact same request in a terminal, where CORS restrictions do not apply.