SSL Clock

When does your certificate expire?

Find out in five seconds. Then never look it up again.

A domain, host:port, or a full URL. Port 443 by default.

Three ways to check

  1. Browser padlock. Open the certificate details from the padlock in the address bar. The expiry date is there.
  2. OpenSSL. openssl s_client -connect example.com:443 -servername example.com </dev/null | openssl x509 -noout -enddate
  3. This tool. Enter a domain above. We show the date, the countdown, and whether the name and chain check out.

Or stop checking

A date you looked up once goes stale. Add the domain and we remind you before it expires, by email, Slack or Teams.

Remind me before it expiresCheck a site now

Check a site with the free SSL checker or see pricing. Read the 47-day certificate timeline and Let's Encrypt expiry emails.

FAQ

Is this check free?

Yes. No signup to see the expiry date.

Can I get reminders after I check?

Yes. Add the domain and we remind you before it expires.