HTTP Header Diff Tool – Compare Web Server Response Headers

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

Enter two valid URLs you’d like to compare.
Click the “🔎 Compare Headers” button.
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

Related tools: Base64 Decoder, IP Calculator

Skylar Pearce

My name is Skylar Pearce, I have been working as a System Administror since 2013 as well some side consulting work. During my career I have worked with everything from Active Directory and vCenter to configuring routers and switches and phone systems, documenting and scripting my way through the whole thing. I have a Security+ certification and am currently working on my PenTest+. Throughout my career I have gained almost all of my knowledge from blogs like this. It is now time for me to pay it back. Over time I have gathered scripts and tricks over the years that I will share on this site. A lot of the posts here will be mainly reference posts, some will be full on how to’s. I am happy to go into more depth on any other topics I go over here, just make a comment on a post. I will do my best to post once a day on weekdays but as I run out of ideas it may slow down. My WordPress skills are still growing so the site will likely get better over time as I learn. You can reach me at contact@allthesystems.com or on LinkedIn