SSL Certificate Checker

Inspect the live TLS certificate any domain serves, plus its issuance history from the public certificate transparency logs.

Enter a domain name to see the certificate it serves right now, plus its history from certificate transparency logs.

Our server connects to the host on port 443 and queries the public crt.sh log search for you — your browser talks to neither.

SSL Certificate Checker

Inspect the live TLS certificate any domain serves, plus its issuance history from the public certificate transparency logs.

Common uses

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

Also searched as

  • check ssl certificate expiry online
  • when does my ssl certificate expire
  • check https certificate of a domain
  • tls certificate lookup
  • certificate transparency log search
  • crt.sh alternative
  • bulk ssl certificate check
  • caa record check
  • who issued ssl certificate for domain
  • list all certificates issued for a domain
  • find certificates expiring soon

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.

How do I check when an SSL certificate expires?

Enter the domain in the Single Domain tab to see the live TLS certificate it serves, including its validity dates.

Can I check several domains at once?

Yes, the Bulk / Multi-Domain tab checks a list of domains in one go.

How can I see every certificate ever issued for my domain?

The tool queries public certificate transparency logs and lists the issuance history for the domain.

Can I check CAA records?

Yes, the CAA Check tab shows which certificate authorities a domain permits.