Free Cron Expression Generator & Parser
Build cron schedules visually or paste an existing cron expression to decode it. See human-readable descriptions, parsed fields, and next scheduled run times. Free, instant, and 100% client-side — your data never leaves your browser.
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Frequently Asked Questions
A cron expression is a string of five fields that defines a schedule for recurring tasks. Originally from Unix cron, it's now used everywhere — CI/CD pipelines, task schedulers, data sync tools, and cloud services.
Each field represents a time unit: minute, hour, day of month, month, and day of week. Together they specify exactly when a job should run.
The standard 5-field format is:
minute hour day-of-month month day-of-week| Expression | Description |
|---|---|
| * * * * * | Every minute |
| */5 * * * * | Every 5 minutes |
| */15 * * * * | Every 15 minutes |
| */30 * * * * | Every 30 minutes |
| 0 * * * * | At minute 0 of every hour |
| 0 0 * * * | At 00:00 every day |
| 0 12 * * * | At 12:00 every day |
| 0 9 * * 1 | At 09:00 on Monday |
*Wildcard — matches every value in the field,List — specify multiple values (e.g. 1,3,5)-Range — specify a range of values (e.g. 1-5 for Mon-Fri)/Step — specify intervals (e.g. */5 for every 5 units)Need automated data syncs on a schedule?
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