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Crontab Query

Decode, validate, and debug your cron schedule expressions instantly.
* * * * *

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Non-Execution ModeThis tool only explains cron schedules. Always test cron jobs in a local or staging environment before production use. No commands are executed here.
Cron Expression

Human Readable

Enter a valid expression to see the description...

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What is Cron?

Cron is a time-based job scheduler in Unix-like computer operating systems. Users that set up and maintain software environments use cron to schedule jobs (commands or shell scripts) to run periodically at fixed times, dates, or intervals.

The "crontab" (cron table) is a configuration file that specifies shell commands to run periodically on a given schedule.

Common Patterns

  • 0 * * * * - Run once an hour at the beginning of the hour
  • 0 0 * * * - Run once a day at midnight
  • 0 0 * * 0 - Run once a week at midnight on Sunday
  • */5 * * * * - Run every 5 minutes

Frequently Asked Questions

Does this tool run my cron jobs?

No. This is purely a validation and calculator tool. It does not execute any commands on any server. It simply tells you when a cron expression would run if put into a server.

Why is the day of week 0-6?

In standard cron syntax, 0 represents Sunday and 6 represents Saturday. Some systems also allow 7 for Sunday, but 0-6 is the universal standard.

How are timezones handled?

This tool uses your browser's local timezone for all calculations. If you are scheduling for a server in UTC or another timezone, please adjust accordingly.