HTTP Server Header Checker

It sends a live HTTP request to the URL you enter and captures the complete set of response headers the server sends back, along with the final status code and, if the request was redirected, the URL it landed on. This is the same header data your browser receives on every page load, just surfaced directly instead of hidden in the browser's network inspector.

Many sites simply haven't configured headers like Content-Security-Policy, HSTS, or X-Frame-Options, since they aren't required for a page to function and are easy to overlook. A missing header isn't necessarily a critical flaw, but each one you add closes off a specific class of browser-based attack, so it's worth reviewing which ones make sense for your site.

Some hosting providers and CDNs deliberately strip or generalize the Server header (showing just 'cloudflare' or omitting version numbers, for example) as a small security-through-obscurity measure, making it harder for automated tools to target known vulnerabilities in a specific software version. This is a common and reasonable practice, not a sign of anything wrong.

Your browser's network tab shows headers too, but it requires opening dev tools, finding the right request, and reading through it manually — and it only shows what your specific browser and its extensions received, which can differ from what a fresh, unauthenticated request gets. This tool gives a quick, shareable, browser-independent snapshot of exactly what the server returns.

Indirectly, yes — caching headers affect how fast repeat visits load, the Content-Type header needs to be correct for search engines to parse a page properly, and redirect-related headers (Location, status code) determine whether link equity passes cleanly through a redirect. Security headers don't directly move rankings, but a site flagged as insecure or broken by browsers can lose visitor trust and, over time, engagement signals.