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Cron 表达式解析器

将 Cron 表达式解析为可读描述，并显示下次计划执行时间。

Minute (0-59) (0-59)
Hour (0-23) (0-23)
Day (1-31) (1-31)
Month (1-12) (1-12)
Weekday (0-6) (0-6)

About Cron Expressions

Cron is a time-based job scheduler in Unix-like systems. A cron expression consists of 5 fields: minute, hour, day of month, month, and day of week. Special characters include * (any), / (step), , (list), and - (range). Used extensively in CI/CD, scheduled tasks, and automation.

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使用方法

  1. Enter a cron expression (5 fields: minute hour day month weekday)
  2. Or click a quick preset button for common schedules
  3. View the human-readable description
  4. Check the next scheduled run times

常见用途

  • Setting up scheduled tasks on Linux servers
  • Configuring CI/CD pipeline schedules
  • Planning cron jobs for backups
  • Debugging crontab entries

常见问题

What is a cron expression?
A cron expression is a string of 5 fields (minute, hour, day, month, weekday) that defines a schedule for recurring tasks in Unix-like systems.
What do the special characters mean?
* means any value, / means step (*/5 = every 5), , means list (1,3,5), - means range (1-5), and specific numbers mean exact values.
Can I see when my cron job will run next?
Yes. Enter your cron expression and the tool will show the next scheduled execution times, plus a human-readable description.