SSL Certificate Checker
NEWEnter a domain to see when its SSL certificate expires, who issued it and which names it covers.
How to use SSL Certificate Checker
- Enter a domain, e.g. example.com.
- Click check.
- See its SSL certificate's expiry date, issuer and covered domain names.
Frequently asked questions
What happens if my SSL certificate expires?
Browsers will show visitors a prominent security warning and block easy access to your site — most people won't click through it. It's worth checking expiry well before the deadline, especially since some certificate authorities only issue short-lived certificates.
What does "Covers" mean in the results?
It lists every domain and subdomain the certificate is valid for (its Subject Alternative Names) — a certificate for example.com won't necessarily cover www.example.com or api.example.com unless they're explicitly listed.
Is checking someone else's domain's certificate a problem?
No — certificate details are public information, visible to anyone who connects to the site over HTTPS. This tool just automates what your browser already does on every visit.
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