12-hour certificate polling
Every monitored hostname is checked once every 12 hours. Renewals, replacements, and CT-log changes are detected on the next scheduled poll.
Features
SSL certificate expiry monitoring, built for teams who can't afford an outage.
Every feature you need to monitor SSL certificates — continuous polling, smart alert windows, bulk upload, SSO, certificate transparency, and a full API — wrapped in the operational polish of a developer tool.
Multi-channel email alerts
Alerts go out at 30, 15, 7, 1, and 0 days before expiry. One alert per stage, deduplicated across the team.
Bulk CSV upload
Drop a CSV of every hostname you own. We'll validate, dedupe, and start monitoring in a single pass — with a transparent plan-limit check.
Single sign-on
Sign in with Google, Microsoft 365, GitHub, or a 10-minute email link.
Certificate transparency alerts
Know the moment a new certificate is issued for one of your domains — even if you didn't request it.
API and webhooks
Push every state change into Slack, PagerDuty, or your incident platform via a full REST API.
Comparison
How our SSL certificate expiry monitoring tool compares.
A modern, focused alternative to legacy SSL certificate monitoring tools — better defaults, no agent, transparent pricing.
| Capability | monitorsslcertificates.com | Others |
|---|---|---|
| Free public SSL checker | yes | yes |
| No signup to check | yes | no |
| Continuous monitoring | yes | yes |
| Email alerts at 30/15/7/1/0 days | yes | yes |
| Bulk CSV upload | yes | yes |
| Magic-link sign-in | yes | no |
| Google / Microsoft 365 / GitHub SSO | yes | limited |
| Free plan hostname allowance | 10 | 2-3 |