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Understand a POSIX cron schedule

Explain five-field POSIX cron and list the next local or UTC runs.

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Cron Expression Explainer

Cron field explanation
Minute
Hour
Day of month
Month
Day of week

When both day fields are restricted, either field may match (traditional cron OR rule).

What this tool does: Cron Expression Explainer

Explain five-field POSIX cron and list the next local or UTC runs. Your input and results stay in this browser tab. The operation runs locally, and the page explains the exact scope before you reuse the output. Only five-field POSIX-style cron is supported; Quartz, seconds, year, and special operators are rejected.

Useful for: Cron Expression Explainer

  • Use Cron Expression Explainer for a quick one-off result without installing another app.
  • Useful for work involving cron parser, crontab, cron schedule.
  • Choose it when browser-only processing matters and this boundary fits the task: Only five-field POSIX-style cron is supported; Quartz, seconds, year, and special operators are rejected.

How to use it

  1. Enter or paste the content you want to process.
  2. Choose the relevant mode and run the tool.
  3. Review the result, then copy it if needed.