Get HTTP Headers — View Response Headers Online

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How to use Get HTTP Headers

Enter the URL.
Read the response headers — caching, content type, security, server, cookies.
Audit by concern: caching present on static assets? security headers set? content type correct?
Fix in server/CDN config and re-fetch to confirm — headers are configuration, not content.

What is Get HTTP Headers?

This tool fetches the HTTP response headers a server sends with a URL — the metadata accompanying every response: content type, caching directives, server software, security headers, cookies, redirects and more. Headers travel with every page but stay invisible to normal viewing; this surfaces them.

Headers govern behavior the page content never shows — how browsers cache it, whether HTTPS is enforced, what content type it's treated as, which security protections apply. Reading them is essential for debugging, security audits and performance work.

About the Get HTTP Headers

Enter a URL and read its full response headers.

What to look for: caching (Cache-Control, ETag, Expires — whether and how long the resource caches; missing headers on static assets = a silent speed leak); content type (is the server declaring the right MIME type? wrong types cause files to download instead of display, or scripts not to run); security headers (Strict-Transport-Security, Content-Security-Policy, X-Frame-Options — their presence is a hardening checklist, their absence the most common audit finding); server info (the Server header naming the stack — informative, and a reason some hide it); and redirects and cookies (Location, Set-Cookie).

Uses: verifying a deploy applied its intended headers (caching, security, CDN), diagnosing "why won't this cache / why does this download instead of open / why the mixed-content warning", and technical SEO/security audits. This is the same capability as our HTTP Headers Checker — both fetch and display the response header set; use whichever you land on. For just the status code, the Status Code Checker isolates that; for the certificate layer, the SSL Checker.

Frequently Asked Questions

How the server wants the response handled: caching rules, content type, security policies (HSTS, CSP), server software, cookies and redirects. They control browser behavior invisibly — essential for debugging and security review.

Check Cache-Control and Expires — missing or no-cache directives on static assets force re-download every visit. The fix is server/CDN config adding proper cache headers to CSS, JS and images.

Strict-Transport-Security (force HTTPS), Content-Security-Policy (control resource loading), X-Frame-Options (anti-clickjacking), X-Content-Type-Options: nosniff. Their absence is the top finding in most quick security audits.

A Content-Type or Content-Disposition header issue — the server is declaring the file as a download or the wrong MIME type. Correct the content type header (e.g. application/pdf with inline disposition) so browsers render it.

Minor hardening — obscuring the software/version slightly slows targeted attacks (security by obscurity, not real defense). Reasonable as part of a broader hardening pass, not a priority on its own.