HTTP Headers Checker
Fetch any URL and inspect status code, response headers, redirect chain, response time, and security headers.
Redirects are followed and every hop is checked for private/internal targets.
Enter a URL to inspect HTTP response
Missing security headers are highlighted with recommendations.
HTTP Header Checker fetches a URL and returns everything the server sent beyond the visible page: the status code, the complete redirect chain, response time, and every response header, including the security headers — such as HSTS and Content-Security-Policy — that control how browsers are permitted to treat the page.
Checking headers is useful whenever something behaves unexpectedly at the network level: a redirect loop, a caching issue in which a deployed fix still shows the previous version, or confirming that security headers were actually applied in production after a configuration change. The redirect chain view makes multi-hop redirects, which add measurable load time, immediately visible.
A missing security header is not necessarily a serious problem, but it is inexpensive to fix and easy to overlook. This tool identifies exactly which common headers are absent.