Cronwise

Decode any cron expression: plain English, next runs, live grid.

Cronwise turns any five-field cron expression into plain English, lists its next run times, and paints a live day-of-week × hour schedule so you can see the rhythm at a glance. It parses lists, ranges, steps and month/weekday names, handles the Vixie day-of-month-or-weekday rule, and flags mistakes instantly. Built end-to-end with AI, it runs entirely offline in your browser with no login, and the whole single-file source is downloadable to self-host or remix.