SSL certificate monitoring
Catch expiring certificatesbefore your visitors do.
Domain Lab tracks the SSL/TLS certificates on your domains — expiry dates, issuer changes, and renewals — and alerts you in time to act, with AI that explains each change in plain English.
Shorter cert lifetimes, more chances to miss one
Certificate lifetimes keep shrinking — 90-day certificates are now the norm, and the industry is heading shorter still. That means more renewals per year across more subdomains, and a single failed auto-renewal puts a full-screen browser warning between you and every visitor. E-commerce checkouts stop. API clients start throwing TLS errors.
Automated renewal is great — until it isn't. Independent monitoring is how you find out the renewal didn't happen while there's still time to fix it.
What Domain Lab watches
Expiry countdown
Certificate not-after dates are tracked on every scan, with alerts at your chosen thresholds before expiration — not after the warnings appear.
Issuer & renewal changes
When a certificate renews or the issuing CA changes, that's recorded as an event. Unexpected issuer changes can signal misconfiguration — or worse.
AI context on every event
"Your certificate renewed on schedule with the same issuer" reads very differently from "the issuer changed unexpectedly." Domain Lab's AI review says which one happened and what to do about it.
Together with domain & DNS health
Certificates, domain expiry, and DNS changes live in one event feed per domain — because an SSL problem is often really a DNS or domain problem.
Frequently asked questions
How does Domain Lab monitor SSL certificates?
On each scan, Domain Lab connects to your domain externally and reads the live certificate — expiration date, issuer, and configuration. Changes are recorded as events with alerts, and the AI review explains what each change means.
Will I be alerted before a certificate expires?
Yes. Expiry alerts fire ahead of the not-after date through your chosen channels — email, Slack, Pushover, or webhooks — with thresholds you control per domain.
Does this work with Let's Encrypt and other auto-renewing certificates?
Yes — and that's where independent monitoring matters most. Auto-renewal usually works, but when it silently fails, Domain Lab notices the approaching expiry and alerts you while there's still time to renew manually.
Can I monitor certificates on domains hosted anywhere?
Yes. Monitoring is external and agentless — no code to install, no DNS changes. If the domain serves TLS publicly, Domain Lab can watch it, regardless of host or registrar.
What else is monitored alongside SSL?
Every domain gets domain expiration (WHOIS/RDAP), DNS record change detection with diffs, and WHOIS change monitoring in the same event feed — one dashboard for the full health of each domain.
Stop discovering expired certs from screenshots
Free plan, no credit card. Pro monitors up to 100 domains for $9/month.
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