HTTP Header Checker
FreeInspect HTTP response headers from any URL
About HTTP Header Checker
Every response from a web server carries HTTP headers you don't normally see — caching rules, security policies, redirects, server software, cookies. This HTTP header checker fetches them for any URL and lists them out clearly, so you can confirm what's actually being sent without opening browser dev tools.
Type in a URL and get the full response header dump: status code, content type, cache-control, security headers like HSTS and CSP, and anything else the server returned. It's useful for debugging a deploy, auditing a site's security headers, or just understanding why a page behaves the way it does — free, no signup, works on any public URL.
Common uses
- Checking whether security headers like CSP or HSTS are actually set after a deploy
- Debugging unexpected caching behaviour by inspecting Cache-Control and ETag
- Confirming redirect chains and status codes for a URL
- Seeing what server, framework or CDN a site is running behind the scenes
How to use
- 1
Enter your details
Type or paste your content and pick a type using the fields below.
- 2
Customise the output
Adjust the available options — size, colour and other settings — to suit your needs.
- 3
Download or copy
Your result is generated instantly in your browser. Download it or copy it directly to your device.
Why ToolHub?
- Real-time results
- DNS, IP, speed checks
- No setup required
FAQ
What's the difference between this and browser dev tools?
Dev tools show headers for a page you've already loaded in your own browser session (with your cookies, cache, extensions). This checker makes a clean, separate request to the URL, so you see exactly what any outside visitor or crawler would receive.
Can I check headers for any website?
Yes, for any public URL — your own site or someone else's. It's commonly used to audit security headers on a site before or after a deploy.
Does it show response headers or request headers?
Response headers — everything the server sends back, including status code, caching, security and server-identification headers.
Will this follow redirects?
The checker reports the headers for the URL you enter; if that URL redirects, the status code and Location header make the redirect chain visible.
Can I use HTTP Header Checker on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.