SSL Certificate Checker

Look up TLS certificates for any domain via the public crt.sh certificate transparency log — no proxy or API key required.

Examples:

Enter a domain name to look up its TLS certificates via certificate transparency logs.

The domain you enter is sent to crt.sh's public Certificate Transparency log search — no API key required.

SSL Certificate Checker

Look up TLS certificates for any domain via the public crt.sh certificate transparency log — no proxy or API key required.

Common uses

  • Check all TLS certs issued for a domain
  • Find certificates expiring in the next 30 days

Frequently asked questions

Is my data uploaded to a server?

Partially. The domain(s) you enter are sent to crt.sh's public Certificate Transparency log search — that's unavoidable for a real certificate lookup.