Cron Expression Parser

What is this tool?

This cron expression parser validates five-field cron schedules and shows a human-readable summary plus upcoming run times. The supported field order is minute, hour, day of month, month, and day of week.

Cron syntax is compact but easy to misread. */5 means every five units, ranges such as 1-5 include both ends, and * means every allowed value in that field. Different schedulers may add seconds, years, time zones, or special tokens, so always match the target platform.

Use the parser before changing CI schedules, server jobs, Kubernetes CronJobs, cleanup tasks, reports, monitors, and automation rules.

How to use

1. Enter a five-field cron expression such as 0 9 * * 1-5.
2. Click Parse to validate it.
3. Review the plain summary and next five run times.
4. Copy the result into a runbook, ticket, or deployment note.

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