API Request Builder – Free Online Utility

Build and test HTTP requests with a modern, Postman-like interface.

Enabled

Your requests are executed client-side. Some APIs might block requests due to CORS.

Frequently Asked Questions

Browsers enforce Cross-Origin Resource Sharing (CORS) for security. If the API you are calling doesn't explicitly allow requests from metatool.in, the browser will block it. For testing, use APIs that support CORS like JSONPlaceholder.

Yes. All requests are made directly from your browser to the destination API. We do not proxy, store, or log any of your request data or authentication tokens.

Currently, the builder supports text-based payloads (JSON, Text, HTML). Support for multipart/form-data and binary uploads is coming soon.

Related Free Tools

CURL Builder — Build complex CURL commands interactively via a simple UI.
HTTP Header Parser — Parse raw HTTP headers into a structured, readable format.
JSON Formatter — Format, validate, and beautify JSON data instantly.