Catch SSL certificate problems before browsers block a client site
DownCTL watches certificate validity, expiration windows, hostname coverage, and certificate evidence across client sites so your team can renew or investigate before visitors see browser trust warnings.
No credit card required during the trial period.
What SSL monitoring tracks
SSL monitoring tracks certificate health and renewal timing so HTTPS problems are visible before browsers show trust warnings.
Certificate validity
Days until expiration
Issuer and subject details
Hostname coverage
SANs, key, and signature evidence
Configurable expiration thresholds
Why it matters
Certificate failures are visible, disruptive, and usually avoidable. Monitoring gives teams enough lead time to renew before visitors are blocked.
Expired certificates break customer trust
Browser warnings can stop conversions instantly
Hostname or chain surprises can happen even when uptime looks fine
SSL failures often surface outside normal uptime checks
How it works in DownCTL
SSL monitoring protects the trust layer of client website operations alongside uptime, DNS, and domain expiration monitoring.
- 1 Add a website
- 2 DownCTL checks SSL status over HTTPS
- 3 Review certificate evidence in the health details modal
- 4 Set the warning window your team needs
- 5 Alert the right channels before expiration
Keep exploring the website operations stack
DownCTL checks client websites continuously, records response history, and alerts your team when downtime or slow responses need attention.
DownCTL tracks registration timing and RDAP evidence for client domains so renewal reminders, registrar details, and nameserver context do not disappear in inboxes, calendars, or ownership changes.
DownCTL helps you see DNS failures, authoritative nameserver response evidence, and reputation issues beside the rest of each client website health story.
Create reusable destinations and workspace routes for early warnings, incidents, and daily digests — with clear delivery history for every channel.
Common questions
What is SSL certificate monitoring?
SSL certificate monitoring checks certificate validity, expiration timing, and useful certificate evidence for HTTPS websites.
Can DownCTL show which names a certificate covers?
Yes. DownCTL stores certificate details such as subject alternative names and hostname coverage when the certificate can be inspected.
How far in advance can I be warned?
You can configure alert thresholds around the warning window your team needs.
Does this require installing an agent?
No. SSL checks run over HTTPS against the monitored site.
Can alerts go to Slack or PagerDuty?
Yes. SSL alerts can use DownCTL notification channels such as Slack, PagerDuty, email, webhooks, and more.
Start monitoring with DownCTL
Start your free trial and bring client-site uptime, website health, alerts, and status pages into one place.
14-day free trial · No credit card required · Cancel anytime