Free Uptime & Monitoring Tools

4 free tools for uptime monitoring, SLA calculations, and more

100% free · No signup required

Calculators

Calculate uptime, downtime costs, and SLA metrics

Downtime Cost Calculator

Calculate the financial impact of website downtime

Runs locally in your browser

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SLA Uptime Calculator

Calculate allowed downtime from SLA uptime percentages

Runs locally in your browser

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Unix Timestamp Converter

Convert Unix timestamps to dates and dates to timestamps with timezone support

Runs locally in your browser

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Generators

Generate configurations, scripts, and test data

Cron Expression Generator

Build and validate cron expressions with visual builder and human-readable output

Runs locally in your browser

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Start monitoring in a few minutes

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Free plan · 50 monitors · No credit card required