Dev Tools / Cron Generator & Explainer

Cron Generator & Explainer

Build and explain Linux or AWS EventBridge cron expressions. Preview upcoming runs in any supported time zone and UTC.

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How this tool works

Cron format

Linux: minute, hour, day, month, weekday. AWS: add year; use ? in exactly one of the two day fields. Lists, ascending ranges, steps and English month/day names are supported. AWS also supports L, nW, nL and n#k (not LW or L-offsets).

Time zone (IANA)

Nonexistent local times are skipped. Linux preview includes both occurrences of a repeated time; AWS preview uses the first occurrence only. Linux daemon policies can differ. This is a preview, not a scheduler.

Processed in your browser. Your input is not uploaded or stored.

Linux: restricted day-of-month and weekday fields are combined with OR.