// GUIDE
Why monitor SSL certificates
Certificate lifetimes are shrinking fast (90 days today, 47 days soon). Manual renewal from memory does not scale.
A single expired certificate takes down a site, an API, or a payment flow — and the failure is total, not gradual.
Shorter lifetimes mean more renewals per year and more chances to forget one.
Monitoring gives you lead time: staged alerts before expiry, plus detection of unexpected issuance via Certificate Transparency.
CertFleet makes it a one-minute setup with a generous free tier.
▸ START MONITORING
CertFleet probes the live certificate, watches Certificate Transparency, and alerts you 30/14/7/1 days before expiry. Free for 5 certificates, no card.