The "HSTS Test" tool from TeckBlaze analyzes the Strict-Transport-Security header in real time. You enter a URL above, we fetch the page exactly as Googlebot would, isolate the tested element, compare it to 2026 best practices, and tell you in plain words whether it passes, needs work, or is critical.
Why hsts test still matters in 2026
Without solid security configuration, Chrome shows warnings and Google quietly downranks pages. It's also your first defense against brand impersonation.
The newer reason: AI answer engines and link previews
AIs often refuse to cite sites with security or reputation problems. An invalid certificate, mixed content or a spoofable domain is enough to drop you from citations.
Common mistakes worth checking
the Strict-Transport-Security header misconfigured or missing.
Expired or self-signed SSL certificate (browser shows a warning).
Mixed content (HTTP on an HTTPS page) breaking the padlock.
DNS without SPF/DMARC, domain exposed to spoofing.
How do I fix it?
Fixing the Strict-Transport-Security header usually takes minutes once you know where to look. Below: the code example, where to edit it based on your stack, the usual causes, and the best practices that keep the issue away.
