Free Tool

SSL Certificate Checker

Enter any domain to inspect its SSL certificate: expiry, issuer, chain, and supported hostnames.

What this checks

  • Connects to the domain on port 443 over TLS and captures the certificate chain.
  • Reports the certificate's expiry, issuer, signature algorithm, and Subject Alternative Names.
  • Flags expired, expiring-soon (under 14 days), or domain-mismatch certificates.
  • Common reasons a check fails: domain doesn't have HTTPS, port 443 firewalled, or DNS doesn't resolve.
Nova Grid Hosting

All of this, handled for you.

Nova Grid hosting plans include free auto-renewing Let's Encrypt SSL on every site, no setup, no expiry surprises.

View hosting plans Compare services

Plans from $14/mo · 30-day money-back guarantee · Free site migration