HTTP Header Viewer
See response headers and the full redirect chain for any URL.
This tool has to ask the internet. What you enter is sent to our server, which queries public DNS, registry or certificate data on your behalf. We never log it, store it, or pass it to anyone else — but unlike the browser-only tools, it does leave your device.
About the HTTP Header Viewer
Requests a URL and shows every response header, following the redirect chain and reporting each hop with its status code, so you can see the whole journey rather than only the destination.
When you would use it
- Checking whether security headers such as HSTS or a content security policy are actually being sent.
- Debugging a redirect loop or an unexpected final URL.
- Reading caching headers to understand why something is or is not being cached.
What it does not tell you
The request comes from our server, not from your browser, so anything that varies by client — geography, user agent, cookies, an existing session — may differ from what you would receive. It shows what the server sent, never whether the browser will honour it.