Cron Expression Parser

Fields: minute (0-59) hour (0-23) day-of-month (1-31) month (1-12) day-of-week (0-7, 0 and 7 = Sunday)

Why Parse Cron Expressions?

Cron syntax is compact but notoriously easy to misread — a misplaced field can schedule a job every minute instead of once a day. Our parser validates every field, explains what the expression means in plain language, and lists the next five times it will actually fire.

Features

  • Full field support — wildcards, lists, ranges, and step values.
  • Plain-language description — derived directly from your expression.
  • Next 5 run times — simulated forward from the current moment.
  • Validation — clear errors for malformed or out-of-range fields.

Common Use Cases

  • Verifying a cron schedule before deploying a scheduled job or CI pipeline.
  • Understanding an unfamiliar cron expression found in legacy infrastructure code.
  • Checking exactly when a backup, report, or cleanup task will next run.

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