See every HTTP header a server sends back
Enter a URL and read its raw response headers in plain language — status line, redirects, content type, caching, compression and every security header, grouped and explained.
Runs in the Website Inspector — no account, nothing to install.
Sample report · illustrative data
Everything the report surfaces
Full raw header list
Every response header the origin returns, shown verbatim and grouped by purpose so nothing is hidden or normalized away.
Redirect chain resolved
Follows 301/302/307/308 hops and shows each Location, so you see exactly where a URL ends up and how many round-trips it costs.
Caching & compression
Reads Cache-Control, ETag, Age, Vary and Content-Encoding to show whether responses are cacheable and how they are compressed.
Content type & encoding
Confirms the Content-Type, charset and transfer encoding a client will actually parse — the source of many rendering bugs.
Three steps to a full answer
Enter a URL
Paste any http or https address. No account, no extension, no setup.
We fetch the response
The Website Inspector makes a real request and captures the exact headers returned, following any redirects along the way.
Read the breakdown
Headers are grouped into status, caching, security, content and transport, each with a short explanation of what it does.
See every HTTP header a server sends back
Open the Website Inspector and get your answer in seconds.
Go deeper in the reference library
Common questions
What is an HTTP header checker?
It is a tool that fetches a URL and shows the HTTP response headers the server returned — the metadata that controls caching, security, content type and redirects, none of which is visible in a browser without developer tools.
Which headers does it show?
Every header in the response, grouped by role: the status line, redirect Location headers, Cache-Control and ETag, Content-Type and Content-Encoding, and security headers such as Strict-Transport-Security, Content-Security-Policy and X-Frame-Options.
Does it follow redirects?
Yes. If a URL returns a 3xx redirect the checker resolves each hop and shows the headers at every step, so you can spot redirect loops or unexpected downgrades from https to http.
Is it free?
Yes. The Website Inspector runs in your browser with no account and no request limits for interactive checks.