HTTP header checker
Inspect HTTP response headers for any URL. Check cache-control, security headers, and server info free.
HTTP response headers carry metadata browsers and CDNs use to cache content, enforce security policies, set cookies, and negotiate compression. Developers and SEO specialists inspect headers when debugging cache misses, HSTS misconfigurations, CORS errors, or missing content-type values. Qikot's HTTP header checker issues a HEAD request and lists every header the server returns, alongside status code and response time.
Common headers include Cache-Control and ETag for caching, Strict-Transport-Security for HTTPS enforcement, Content-Security-Policy for XSS mitigation, and Server or Via for infrastructure hints. Reviewing these after deployments ensures CDN settings, origin configurations, and security middleware behave as intended. Header checker results help before and after migrating to a CDN or enabling new WAF rules.
HEAD requests ask the server to return headers without a body, keeping checks efficient. Some applications respond differently to HEAD; if headers seem incomplete, compare with browser developer tools using GET. Redirect chains are followed automatically so you see headers from the final response in most cases.
Pair header analysis with SSL checker for certificate lifecycle and speed test for TTFB impact of cache hits versus misses. Security headers especially affect audit compliance and browser trust indicators even when page content loads correctly.
Checks run from our remote servers with brief caching (about two minutes). No account required. Headers may contain sensitive internal hostnames; share results carefully in support tickets and public posts.