Cron Expression Parser

How to Use

1. Type a 5-field cron expression: minute, hour, day-of-month, month, day-of-week.
2. Each field's meaning and the next 5 scheduled run times (in UTC) are calculated instantly.

How Cron Expressions Work

A cron expression has five space-separated fields in order: minute (0-59), hour (0-23), day of month (1-31), month (1-12), and day of week (0-6, where 0 is Sunday). Each field accepts * (any value), a single number, a range (1-5), a comma-separated list (1,15,30), or a step (*/15 means every 15 units). If both day-of-month and day-of-week are restricted (not *), a match occurs when either condition is true.

Common Uses

• Understanding what an unfamiliar cron schedule (e.g. in a CI/CD pipeline or server crontab) actually does.
• Verifying a newly written cron expression runs at the intended times before deploying it.
• Checking when a scheduled job (such as a Celery beat or Kubernetes CronJob) will next run.