DevVault
100% on-device
Cron explainer
Turn a cron expression into a sentence, see the next eight run times, and get warned about the day-of-month and day-of-week trap that makes schedules fire far more often than people expect.
Runs entirely in this tab. What you paste is never sent anywhere.
Five fields, or six with a leading seconds field. Times are shown in this machine’s local timezone.