Free tools
Free website tools
No account needed. Each check runs once, from our own monitoring network.
SSL checker
Certificate validity, expiry, issuer, chain trust, host name match and the negotiated protocol.
Is it down?
Open a URL from every monitoring region and see per region whether it answers, and how fast.
SLA calculator
Turn an uptime percentage into allowed downtime per day, week, month, quarter and year, and back.
Get alerted before your visitors notice
UptimeVanguard checks your sites, certificates, DNS and cron jobs around the clock from a region you pick out of ten, and alerts you when something fails.
Free plan: 3 sites checked every 5 minutes, with every check type and every alert channel. No card needed. Paid plans check every 60 seconds, and every 30 seconds for up to 10 HTTP or ping checks per team.