Free SSL Certificate Checker
Instantly verify a site's SSL certificate · issuer, expiration date, TLS version, and hostname match.
Frequently asked
What does this SSL checker verify?
It connects to the domain over TLS on port 443 and reports the certificate issuer, subject, validity dates, days-to-expiry, and negotiated protocol. It also flags expiring, self-signed, and mismatched certificates.
Is my scan data stored?
The certificate details aren't stored · the check runs live and returns the result. We keep a minimal usage log (domain checked, result grade, IP, browser, and referring page) for rate limiting and to improve the tools · it's deleted after 12 months.
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