Does a valid SSL certificate mean a website is secure?
No. It confirms identity and encryption for the connection, but application security, headers, exposed services, cookies, and operational controls still matter.
TOOLSET / TRANSPORT + WEB SECURITY
Inspect the public security surface.
A valid certificate is only one layer. Review transport, browser protections, exposed services, disclosure policy, and reputation as one public-facing system.
01 /
Verify identity and transport.
Begin with the certificate and supported TLS versions, then confirm that visitors consistently reach the intended HTTPS origin.
- Check certificate hostname coverage, issuer, dates, and chain details.
- Confirm TLS 1.2 and 1.3 support and identify legacy protocol exposure.
- Trace HTTP-to-HTTPS and canonical-host redirects hop by hop.
02 /
Review the controls around HTTPS.
Headers, exposed ports, disclosure files, and reputation data provide context that a certificate check cannot.
- Inspect HSTS, CSP, framing, MIME-sniffing, and referrer controls.
- Check selected TCP ports on the resolved public address.
- Validate security.txt publication and inspect blacklist signals.
03 /
Choose the signal you need.
SSL Certificate CheckerIdentity, expiry, SANs, and chain.↗TLS Protocol CheckerModern and legacy protocol support.↗Security HeadersBrowser-enforced protections.↗Redirect CheckerHTTPS and canonical-host paths.↗Port ScannerSelected public TCP services.↗Security.txt CheckerDisclosure-policy discovery and validity.↗Blacklist CheckerDNSBL and reputation context.↗
FAQ /
Operational detail.
Should every site enable HSTS immediately?
Enable HSTS after confirming the site and any included subdomains work reliably over HTTPS; an incorrect rollout can make affected hosts inaccessible to returning browsers.