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Visual Cron Builder

Build or reverse-parse five-field Cronie schedules and preview calendar matches in UTC or your browser timezone.

cron-builderLOCAL WORKSPACE

Enabling local controls…

Minute (0–59)
Hour (0–23)
Day of month (1–31)
Month (1–12)
Day of week (0–7)

Five Cronie time fields only, without commands or Quartz. Specific mode retains advanced field expressions. Editing clears the old preview; checks up to400 days for five calendar matches. Does not execute or schedule jobs. Worker startup10s/processing1s.

How to use this tool

Choose every, step, specific/expression or range for each field, then build. Reverse Parse retains advanced supported field syntax. Copy or download the complete expression and preview.

When not to use it

Five time fields only,256 characters; no commands, seconds, year, Quartz or nickname syntax. Preview checks at most400 days for five calendar matches, not actual job execution. Cronie day-of-month/day-of-week AND/OR and host/DST behavior require review. Worker startup10s/processing1s. Nothing is scheduled or executed.