About This Tool
What is Cron Expression Generator?
A tool for visually building cron expressions and previewing next execution times. Essential for correctly writing cron expressions when setting up scheduled tasks on Linux servers.
How to Use
- Set each field: minute, hour, day, month, and day of week.
- Or select from presets (every minute, hourly, daily, etc.).
- Review the generated cron expression.
- Verify settings with the next execution times list.
Key Features
- Visual cron expression builder
- Presets (every minute, hourly, daily, etc.)
- Next execution times preview
- Automatic expression description
Tips
- Cron expression order is: minute hour day month weekday.
- */5 means 'every 5' (e.g., */5 * * * * = every 5 minutes).
- Both 0 and 7 represent Sunday in the weekday field.
Cron Expression Generator
Visually build cron expressions and check next execution times
At minute 0 of every hour
Next Executions
1.4/22/2026, 7:00:00 AM
2.4/22/2026, 8:00:00 AM
3.4/22/2026, 9:00:00 AM
4.4/22/2026, 10:00:00 AM
5.4/22/2026, 11:00:00 AM
Frequently Asked Questions
什么是cron表达式？▼
cron表达式是由五个字段（分、时、日、月、星期几）组成的字符串，定义Unix/Linux系统中的重复任务计划。例如'0 9 * * 1-5'表示'每个工作日上午9:00'。用于自动备份、日志清理、定时邮件等。
cron中的特殊字符*、/、-和,是什么意思？▼
* = '每个'（任意值）。*/ = '每N'（如*/5 = 每5）。- = 范围（如1-5 = 周一到周五）。, = 多个值（如1,15 = 1日和15日）。可组合用于复杂的计划安排。
如何设置特定时区的cron作业？▼
标准cron表达式不包含时区信息——按系统配置的时区运行。指定时区可在crontab中使用TZ环境变量（如TZ=America/New_York 0 9 * * *）或在任务调度器中配置时区。此工具显示的下次执行时间使用浏览器的本地时区。