Free SSL certificate checker

Check SSL certificate expiry, issuer, validation and TLS details for any public hostname. No login required. Start ongoing monitoring with 2 free CertWatch monitors.

• Check public TLS certificates without an account
• View expiry, issuer, subject names and fingerprint
• 2 free monitors for CloudDefender accounts, including canceled paid subscriptions
• Upgrade to 50 Starter or 200 Growth/Enterprise monitors
• In-app findings; new monitoring accounts enabled by request

Opt-in email and Slack webhook alerts are available for monitored endpoints. Private-network monitoring, certificate transparency and domain registration expiry are planned.