SSL certificate monitoring
Never get caught by an expired certificate again.
An SSL monitor inspects a host's TLS certificate and warns you before it expires — expired certs break trust and take sites offline.
How it works
UptimeAlien checks the certificate's expiry date on a schedule and alerts a configurable number of days before it lapses.
When to use it
- Production TLS certificates
- Certificates outside your automation
- Compliance and renewal reminders
What you get
Days until expiry, the exact expiry date, and an early-warning alert.
Example
*.acme.com — warn 14 days before expiry
Frequently asked questions
What is SSL certificate monitoring?
It checks the expiry date of your TLS certificate on a schedule and alerts you a configurable number of days before it lapses, so a renewal never gets missed.
Does this monitor also watch the domain's expiry?
No — that has its own type. Certificate and domain carry separate expiry dates and very different consequences: a certificate expires every few months and usually renews itself, while a domain registration expires after years and can then only be recovered with effort and cost. Use domain expiry monitoring for that.
Why monitor certificates if renewal is automated?
Automation fails quietly: a renewal hook breaks, a DNS challenge stops validating, a cron job is disabled during a migration. You usually find out when browsers start showing a full-page warning. A certificate monitor turns that into an early notice.
How many days of warning should I configure?
Enough to renew comfortably. Two weeks is a common choice — long enough to react without ignoring the alert, short enough that it stays meaningful.
Does it work with wildcard certificates?
Yes, wildcard certificates are checked in the same way as certificates issued for a single hostname.