SEOHub
Security headers checker
Quickly see which browser security headers your site returns.
Security headers that also show up in audits
Scan for HSTS, CSP, X-Frame-Options, Referrer-Policy, and related headers. Missing controls do not always mean an immediate SEO demotion, but they are trust and security signals SEOHub surfaces in Pass/Fail checks.
After you deploy header changes at the CDN or origin, re-run this checker, then confirm the same hosts in a full audit. Pair with the redirects tool if HTTP→HTTPS hops are incomplete.
FAQ
Is a missing CSP always critical?
Not always — CSP needs careful rollout. Still, HSTS and frame protections are high-value baselines for public marketing sites.
Next: Read the security headers guide · Run a free homepage scan