DEV NO.008
Cron Expression Parser
Explains 5-field cron expressions in plain language and predicts the next 5 runs.
This tool runs entirely in your browser. Nothing is uploaded to any server.
- 30minute
- 3hour
- *day of month
- *month
- 1-5day of week
- #19/28/2026, 3:30:00 AM
- #29/29/2026, 3:30:00 AM
- #39/30/2026, 3:30:00 AM
- #410/1/2026, 3:30:00 AM
- #510/2/2026, 3:30:00 AM
What is this
什么是 Cron 表达式
Cron 是类 Unix 系统的定时任务语法，5 个字段分别代表分、时、日、月、周，用 *、,、-、/ 组合出「每天凌晨 3 点」「每个工作日 9 点」等计划。写对了不如验对了——本工具直接给出未来 5 次触发时间。
What is a cron expression
Cron schedules jobs with 5 fields (minute, hour, day, month, weekday) combined via *, ,, -, /. This tool translates the expression into plain language and shows the next 5 runs so you know it means what you think it means.
如何使用
- 输入 5 段表达式，如
30 3 * * 1-5。 - 阅读自然语言解释与未来 5 次执行时间。
- 从速查表点选常用表达式快速填充。
FAQ
Are 6-field (with seconds) expressions supported?
The standard 5-field format (minute hour day month weekday) is supported — the common ground of Linux crontab and most schedulers.
What if both day-of-month and day-of-week are restricted?
Classic Vixie cron treats them with OR semantics — either matching field triggers the job. The tool follows this rule.
Which timezone is used for predictions?
Predictions use your device's local timezone. Most servers run jobs in UTC — double-check your scheduler's timezone config.