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REST API Tester

Test REST APIs directly in your browser. Send GET, POST, PUT, DELETE requests and inspect responses instantly — no install needed.

Add request headers as key-value pairs.

Note: This tool makes real HTTP requests from your browser. Many APIs block cross-origin (CORS) requests from browsers by design. If a request fails, it's likely a CORS restriction — not a bug in the tool.

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About This Tool

Analyze and validate your data with the Rest Api Tester. Get instant feedback with detailed reports highlighting issues, warnings, and suggestions for improvement. All analysis runs locally in your browser for complete privacy and fast results.

How to Use

  1. Enter or paste the data you want to check into the input area.
  2. Click the analyze/check button to run the validation.
  3. Review the detailed results with highlighted issues and recommendations.
  4. Fix any reported issues and re-check to verify the improvements.

Frequently Asked Questions

What does the Rest Api Tester check for?
The tool performs comprehensive analysis based on established standards and best practices. It identifies errors, potential issues, and suggests improvements with clear explanations for each finding.
Is my data sent to a server for analysis?
No. All analysis runs locally in your browser using JavaScript. Your data never leaves your device, making it safe to check sensitive or confidential information.
How reliable are the results?
The tool follows industry-standard rules and best practices. Results are reliable for general use and development. For compliance or audit purposes, always verify with official tools or professional review.
Can I use this for professional work?
Yes. The analysis follows industry standards and is suitable for both personal and professional use. It's a quick way to catch common issues before formal review.

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