See the exact HTTP response headers a URL returns — status code, server, caching, security headers, and more.
Frequently asked questions
If the URL redirects (e.g. HTTP to HTTPS, or to a different path), the tool follows redirects and shows you the final URL the browser would actually land on.
Headers like Content-Security-Policy, Strict-Transport-Security, and X-Frame-Options tell browsers how to handle a site defensively — their presence (or absence) is a quick signal of a site's security posture.