Free tools

Calculators and utilities for monitoring engineers. No signup, no email, no upsell — just open the tool and use it.

Uptime / Downtime Calculator

See what each uptime SLA tier actually allows in downtime — per day, week, month, and year. Compare two SLAs side-by-side. Estimate the revenue cost.

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More tools coming soon — cron expression builder, DNS lookup, SSL expiry checker. Suggestions on GitHub.