Free tools

Free uptime & SSL tools

Quick, no-sign-up utilities for everyone running production services. Built by the team behind Uptimera.

SSL certificate checker

Inspect any site's SSL certificate. Issuer, expiry, alt names, fingerprint, signature algorithm. No sign-up.

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SLA / uptime calculator

Convert an uptime target (99%, 99.9%, 99.99%, …) into the actual downtime budget it permits per hour, day, month, and year.

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