Never let a security certificate run out again
When a certificate expires, browsers show a full-page security warning and most visitors leave. We watch every website's certificate for you, at no extra cost.
Set up in under a minute
Add your website
Certificate checks come free with every website you watch. Nothing extra to set up.
We look it up daily
Once a day we read the public certificate logs to find when yours runs out and who issued it.
Reminders in time
14, 7 and 1 days before a certificate you renew by hand runs out. If it breaks, you hear on the next check.
What we catch
- Certificates close to running out, with the exact date
- Self-renewing certificates, such as Let's Encrypt and Cloudflare, that are late renewing
- Broken certificates: expired, for the wrong address or not trusted
- Cloudflare's "Invalid SSL certificate" error 526
- What to do next, in plain words, in every alert
Good to know
Do I get reminders for Let's Encrypt certificates?
Only if they're late. Self-renewing certificates normally renew about a month before they run out, so we stay quiet unless the renewal seems to have failed. Then we remind you 7 and 1 days before.
What happens if my certificate breaks?
Visitors would see a security warning instead of your page, so we treat it like the site being down and alert you straight away.
Do I need to install anything?
No. We read the public Certificate Transparency logs and check the connection itself. Nothing goes on your server.
Is it on the free plan?
Yes. Every website you watch includes its certificate checks.
Works well with
Domain expiry monitoring
Reminders before your domain name expires, so your site and email stay up.
Find out moreUptime monitoring
Every minute on Pro, with alerts only after two failed checks in a row.
Find out moreWebsite down alerts
On your phone, computer, email, Slack, Teams, Google Chat, Discord or a webhook.
Find out morePut Site Patrol on watch
Free for one website, live in under 60 seconds. We start watching the moment you add your URL.
Start free