HTTP Header Diff Tool

This free tool helps IT professionals compare HTTP response headers between two URLs in real time. It’s ideal for sysadmins, DevOps engineers, and security auditors who need to detect differences in web configurations, CDN behavior, or security headers.

How to Use

1. Enter two valid URLs you’d like to compare.
2. Click the “🔎 Compare Headers” button.
3. Review the diff table showing matching and differing headers.

Examples & Use Cases

• Ensure your production and staging environments use the same caching policies
• Verify if a reverse proxy is stripping important headers
• Check for missing Content-Security-Policy or X-Content-Type-Options headers

Useful reference: MDN HTTP Headers Guide

👉 Launch the HTTP Header Diff Tool

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