Cron 表达式生成器
可视化构建 Cron 表达式，人类可读预览
🔒 100% client-side — your data never leaves this pageCron Expression
Minute0–59
Hour0–23
Day/Month1–31
Month1–12
Day/Week0–6
Presets
🔒 100% client-side
输出
Human readable
every minute
Field breakdown
Minute*every
Hour*every
Day/Month*every
Month*every
Day/Week*every
About this tool
通过分字段输入或直接键入来构建 Cron 表达式。即时显示人类可读的计划说明和未来 5 次执行时间预览，内置 8 种常用预设。
Frequently Asked Questions
What is a cron expression?
A cron expression is a string with 5 fields (minute, hour, day-of-month, month, day-of-week) that defines a repeating schedule. It is used in Unix-based systems to schedule automated tasks.
What does * mean in cron?
An asterisk (*) means every valid value for that field. For example, * in the minute field means every minute.
What does */15 mean?
The */ syntax means every N units. */15 in the minute field means every 15 minutes (at :00, :15, :30, :45).
How do I run a job on weekdays only?
Use 1-5 in the day-of-week field (Monday through Friday). For example, 0 9 * * 1-5 runs at 9am every weekday.