Free tools for uptime operators.
Explore small utilities for planning uptime targets, checking DNS propagation, inspecting SSL certificates, explaining SLAs, and turning reliability promises into plain numbers.
Free reliability math, kept close to the work.
Small utilities for planning uptime targets, explaining SLAs, and turning reliability promises into plain numbers.
Uptime calculator
Convert uptime percentages into allowed downtime and learn how SLA windows, maintenance, and external monitoring affect the number.
Use tool arrow_forward Available nowDNS propagation checker
Check A, AAAA, CNAME, MX, NS, TXT, SOA, and CAA records across public resolvers while DNS changes roll out.
Use tool arrow_forward Available nowSSL certificate checker
Inspect a domain's TLS certificate, issuer, expiry date, SAN coverage, chain validity, protocol, cipher, and fingerprint.
Use tool arrow_forwardTurn the target into live monitoring.
MarionetteOps gives you free uptime monitors, server agents, public status pages, and alert routing so your uptime math has real signals behind it.