SSL certificate checker

Find out when any site's SSL certificate expires — before your visitors see a scary browser warning.

Why SSL expiry matters

When a certificate expires, browsers show a full-page security warning and most visitors leave immediately. Search rankings suffer, APIs and integrations start failing, and automated renewals (like Let's Encrypt) fail more often than people expect — a misconfigured DNS record or a changed server is all it takes.

The fix is simple: monitor expiry dates and renew with margin. PingDeck checks your certificates every 12 hours and warns you at 14 days and again at 3 days.

Check an SSL certificate expiration date online

This SSL checker online reads the certificate straight from the live server — enter any domain to check the SSL expiry date, days remaining, and whether renewal is due. No installation, no signup: a one-click SSL certificate expiry checker for any public site. Bahasa Indonesia: cek SSL expired.

How to check SSL expiry with OpenSSL (command line)

  1. Open a terminal on any machine with OpenSSL installed.
  2. Run: echo | openssl s_client -servername example.com -connect example.com:443 2>/dev/null | openssl x509 -noout -dates
  3. Read the notAfter line — that is the expiry date.
  4. Or skip the terminal: the checker above does the same in one click.

2026 note: newly issued certificates are now capped at a 200-day maximum lifetime (dropping further in coming years) — renewals happen more often, and forgotten renewals break sites more often. Automated expiry monitoring is the fix.