Cron Expression Parser

Validate five-field cron schedules and preview the next five UTC runs.

Cron Expression Parser
Local input
Output
Processing…
About this tool

Made for the task at hand.

Inspect each schedule field and preview real upcoming runs in UTC. Common aliases and month or weekday names are supported without executing a scheduler.

How to use

  1. Enter minute, hour, day, month, and weekday fields.
  2. Use wildcards, lists, ranges, steps, or supported names.
  3. Review parsed fields and the next five UTC instants.
Your work stays yours.
Tool inputs are processed locally in your browser and are never sent to KitVerse servers. Clear the workspace when using a shared device.
Common questions
Are seconds or @reboot supported?

No. The parser supports standard five fields and common time-based @ descriptors, but not seconds or @reboot.

How do day-of-month and weekday interact?

When both are restricted, traditional cron OR behavior is used; when only one is restricted, it controls the day match.