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Free Developer Tool

Cron Expression Parser

Paste a cron expression and instantly see what it does and when it will run next.

100% Free No signup Runs in your browser No uploads

Supports names like mon and jan, steps, ranges, lists, and 7 as Sunday. Day-of-month and day-of-week follow standard cron OR logic when both are restricted.

Frequently asked questions

What format does this parser accept?

Standard 5-field cron: minute, hour, day of month, month, day of week. It understands stars, steps (*/15), ranges (9-17), lists (1,15), and names (mon, jan).

What happens when both day-of-month and day-of-week are set?

Standard cron behavior applies: the job runs when either field matches, not both. The next-run times reflect that.

Are run times in my timezone?

Yes. Times are computed from your device clock and shown in your local timezone.

Preview

Cron Expression Parser tool preview
Live preview of the Cron Expression Parser tool running in your browser. Your data never leaves your device.

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