HTTP Header Inspector – Analyze Web Server Response Headers

HTTP Header Inspector – Analyze Web Server Response Headers

This quick and simple tool allows IT professionals, sysadmins, and security analysts to inspect the HTTP response headers of any URL. Learn if a web server is returning proper cache headers, security policies like Content-Security-Policy, and more.

No installations or backend required – just enter a URL, and it instantly displays the header response using a client-side HEAD request.

Why Use the HTTP Header Inspector?

Detect missing or improperly set security headers
Debug CDN and reverse proxy issues
Validate cache behavior and CORS settings

The tool is completely browser-based and includes dark mode for low-light environments. View related tools like our Port Scanner and Base64 Decoder for additional diagnostics. It uses native Fetch API for speed and simplicity, and includes links to relevant MDN documentation.

Try the HTTP Header Inspector here.

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