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CertCheck
Enter issue and expiry dates — see how many days remain and whether renewal is needed.
SSL/TLS certificates expire to ensure periodic re-validation of domain ownership and to limit damage from compromised private keys. Most certificates are now valid for 1 year (398 days max since 2020). Let's Encrypt certificates expire every 90 days, encouraging automation.
Renew at least 30 days before expiry to avoid downtime. An expired certificate causes browsers to show security warnings, which can drop traffic by 90%+. Automate renewal with certbot or your hosting provider's auto-renewal feature. Monitor expiry dates with uptime tools.
What you entered
Certificate validity period
2025-01-15 − 2024-01-15= 366 daysDays remaining from today
2025-01-15 − today= -569 daysStatus
Expired= ExpiredResult
Status: Expired 569 days ago
This certificate expired 569 days ago and needs immediate renewal.