Free tools

Small, useful things we built for ourselves and left open to everyone. No account, no sign-up, no results kept.

• Uptime and SLA downtime calculator

  Turn an uptime percentage into the downtime it actually buys you per day, week, month, and year, and work backwards from a minutes-per-month budget.

• SSL certificate checker

  Read the certificate a public site is serving right now: expiry date, days remaining, issuer, names covered, and whether the chain verifies.