API Request Tester

Use this free online API tester to send HTTP requests and test REST APIs directly in your browser. Send GET, POST, PUT, PATCH, and DELETE requests with custom headers, query parameters, and JSON body. View response status, headers, body, and timing. A lightweight Postman alternative — no installation required for API testing online.

Key Features

• Process and analyze data entirely in your browser — nothing is sent to any server
• Handles edge cases, special characters, and large inputs gracefully
• Real-time matching and highlighting as you type
• Support for multiple regex flags (g, i, m, s)
• Visual breakdown of match groups and captures
• Responsive design — works perfectly on desktop, tablet, and mobile

How to Use API Request Tester

1. 1Enter your input data in the API Request Tester input area above
2. 2Adjust any available options or settings to match your requirements
3. 3Click the action button to process your data with API Request Tester
4. 4Copy the result to your clipboard or download it for use in your project

When to Use API Request Tester

API Request Tester is ideal for developers who need a quick, reliable way to free online api tester — send http requests and test rest apis in your browser. Whether you're working on a personal project, debugging production issues, or building enterprise applications, this tool saves time by handling api & web tools tasks directly in your browser without requiring any software installation or account setup.

Common use cases include day-to-day development workflows, code reviews, API debugging, data migration tasks, and quick one-off transformations. Since all processing happens client-side, API Request Tester is safe to use with sensitive or proprietary data — nothing ever leaves your machine.