Cron Expression Builder
Build and visualize standard 5-field cron expressions. Select values for each field or type custom patterns. See a human-readable description and the next scheduled run times.
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Every minute
- Fri, Apr 03, 2026, 04:14
- Fri, Apr 03, 2026, 04:15
- Fri, Apr 03, 2026, 04:16
- Fri, Apr 03, 2026, 04:17
- Fri, Apr 03, 2026, 04:18
How it worksCron Expression Scheduling
01Five fields
minute (0-59), hour (0-23), day of month (1-31), month (1-12), day of week (0-6, Sun=0)
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02Special characters
* (any), */N (every N), N-M (range), N,M (list), L (last day of month)
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03Expression assembly
Five field values joined by spaces — e.g., '*/5 * * * *' means 'every 5 minutes'
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04Human description
Expression translated to natural language — 'At 08:00 on Monday' is more readable than '0 8 * * 1'
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05Next runs
Next 5 execution times calculated from the current date/time by iterating forward and matching the expression
Spec: POSIX cron (IEEE Std 1003.1), crontab(5) man page, Vixie cron
Cron uses the server's local timezone unless the CRON_TZ variable is set. Minute is the smallest granularity — for sub-minute scheduling, use systemd timers or a task queue.