CRON Parser
Parse CRON expressions, describe them in plain language, and preview the next 10 runs.
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浏览器内运行这个工具能做什么
Validate CRON syntax, get a human-readable description, and see upcoming execution times.
Preset buttons cover the most common schedules.
这个工具可以完成什么
Paste the CRON expression from a config file and confirm the plain-language schedule matches the intended run cadence.
Preview upcoming runs in your local timezone before pasting the schedule into an app, CI workflow, or automation platform.
Start from common schedules like hourly, daily, or weekly, then adjust the fields and preview the next run times.
依赖结果前需要检查什么
- Performance and maximum practical input size depend on browser memory, device speed, and the structure of the input.
- Review the generated result before replacing or publishing an original file.
如何使用
- 1
Type a CRON expression or pick a preset.
- 2
Read the plain-language description.
- 3
Review upcoming executions in your local timezone.
使用场景
Paste the CRON expression from a config file and confirm the plain-language schedule matches the intended run cadence.
Preview upcoming runs in your local timezone before pasting the schedule into an app, CI workflow, or automation platform.
Start from common schedules like hourly, daily, or weekly, then adjust the fields and preview the next run times.
使用技巧
If the input parser reports an error, fix the source value first instead of copying a partial result into code, config, or documentation.
The tool runs in your browser, but you should still avoid pasting long-lived production secrets into any shared or screen-recorded session.
Some systems expect five fields, while others accept a leading seconds field. Match the expression format to the scheduler you will paste it into.
Values like */5 and 1-5 are compact but easy to misread in reviews. Use the plain-language output and next-run preview to confirm the final intent.
The preview uses your browser timezone. If production runs in UTC or a fixed region, translate the intended hour before deploying the schedule.
常见问题
Does it support 6-field expressions with seconds?
Yes. Add a seconds field at the start: second minute hour day month weekday.
What syntax is supported?
* (every), */n (every n), n-m (range), n,m (list), and combinations like 1,3-5,*/2.
What timezone are the run times shown in?
They are shown in your browser's local timezone.
下一步常用工具
如果还需要校验、转换或复用结果，可以继续打开相近的浏览器本地工具。