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API testing tool with validation

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API Demo

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About

A browser-based API testing tool — like a lightweight Postman that requires no installation. Request builder with headers, query params, and body editing; response inspector with JSON formatting and status display; request history. I built it because I kept reaching for a full Postman install just to make one test request.

Highlights

  • No installation — runs entirely in the browser
  • Request builder with headers, params, and body
  • JSON response formatting and syntax highlighting
  • 20 active users