Are security headers missing - see status codes and HSTS before scanners flag your site.
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200, 301, 404 - is the server responding as expected?
HSTS, CSP, X-Frame-Options - are protections present?
Redirect chain, Cache-Control, and server type at a glance
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Response headers and security flags explained
Missing HTTP security headers such as HSTS and CSP leave your site open to clickjacking, XSS, and HTTPS downgrade attacks - security scanners flag these gaps before many teams notice.
An HTTP headers checker sends a request to your URL and shows the status code, full response headers, redirect chain, and security flags the server actually returns. A free HTTP headers check helps you verify protections after deploys, CDN changes, or SSL rollouts.
Run a one-time check on the exact URL visitors use - including www and API paths. Add URLs to TotalSiteControl monitoring for alerts when status codes or critical headers change.
Start free monitoring with email alerts. No credit card required.
Inspect response headers for any public URL in under a minute - no account needed.
Paste a full URL or hostname, for example https://yourdomain.com. Include the path if you need headers for a specific page.
Click Check Headers. We request the URL and show status code plus response headers returned by the server or CDN.
Confirm redirects, cache, security, and content-type values match your intent. Fix misconfigurations, then re-check after deploy.
Common misconfigurations that hurt security, SEO, or caching.
Apex, www, HTTP, and HTTPS bounce through several hops. Clients slow down and SEO signals split.
Pick a canonical host and scheme, configure a single hop, then verify Location headers with a fresh check.
Browsers lack HSTS, CSP, or frame protections you thought were enabled at the edge.
Add the headers on the CDN or reverse proxy visitors hit, deploy, then re-check the public URL.
HTML is cached too aggressively, or static assets are never cached. Users see stale pages or slow loads.
Use short or no-store for HTML, longer max-age for versioned assets, then confirm with the headers checker.
Certificate, DNS, and reachability history in one place.
Checks run from our servers - the same path users hit.
Turn a one-off check into monitoring in under a minute.
External probes so internal network blind spots do not hide issues.
Email and Telegram when something fails or is about to expire.
Start free - no credit card required to begin monitoring.
Start free monitoring with email alerts. No credit card required.
Small header mistakes show up as big production bugs.
Follow the redirect destination and inspect headers there, not only on the first hop.
Edge rules can override origin headers. Verify the hostname that browsers actually call.
WAF, CDN, and reverse-proxy panels often ship silent defaults. Confirm live headers after saves.
Header issues often sit next to redirect loops and TLS problems. Check the full path when debugging.
It sends a request to a URL and shows the response status code, headers, redirects, and security-related flags like HSTS and CSP.
Yes. Check any public URL and get instant results - no signup, no credit card, and no limit on one-off checks.
Start with HSTS, Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options. Missing headers leave browsers with weaker default protection.
Strict-Transport-Security tells browsers to use HTTPS only for your domain, reducing downgrade attacks after SSL is enabled.
Common causes include HTTP to HTTPS upgrades, www canonicalization, and trailing-slash rules. See the redirect chain in results or use our URL Redirect Checker.
Yes - any public HTTP or HTTPS URL, including paths on api.yoursite.com or other subdomains.
This tool shows all response headers and security flags. The redirect checker focuses only on hop-by-hop status codes and Location headers.
After deploys, CDN changes, or security hardening. Monitoring catches header drift before it affects users or SEO.