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Cron Expression Parser

Read a cron schedule in plain English and see when it next runs.

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About the Cron Expression Parser

Reads a cron expression back to you in plain English and lists the next several times it will fire, so a schedule stops being five fields you have to decode from memory.

When you would use it

  • Confirming that a schedule you wrote means what you intended.
  • Understanding a cron line you inherited.
  • Checking when a job will next run.

What it does not tell you

Cron dialects differ: some systems support seconds as a sixth field, some support names and step values that others do not, and the day-of-month and day-of-week fields combine with OR rather than AND when both are set, which surprises nearly everyone. The times shown depend on the timezone the job actually runs in, which is a property of that system and not of the expression.