Stop letting expired SSL certs and forgotten domains break your sites.
Enter any domain — in 30 seconds see how many days its cert and domain have left, and whether it's up.
No signup. Read-only: one TLS handshake + one RDAP lookup + one HTTP request.
Want a heads-up
before things break? Vigil emails you 30/14/7/1 days ahead —
Monitor it free →
What Vigil monitors
- 🔒 SSL certificate expiry — counts down the days left and emails you before it lapses.
- 🌐 Domain expiry — tracks the registration expiry date so you never forget to renew.
- 📡 Liveness — probed from multiple regions at once; online if any node can reach it, with instant down/recovery alerts.
- ✉️ Email alerts — expiry approaching, downtime, and recovery, straight to your inbox.