Developer Tools

Cron Expression Explainer

Paste any cron expression (5 or 6 fields) and get a plain-English explanation of when it runs, along with the next 5 scheduled execution times, completely in your browser.

Plain-English schedule explanation Shows next 5 run times Browser-only
text Cron expression
Runs in your browser; code never leaves your device

Features

  • Supports 5-field and 6-field (with seconds) cron syntax
  • Plain-English schedule description
  • Shows next 5 run times with dates
  • Explains each field: minute, hour, day, month, weekday
  • Supports * / - , shorthand and named values (Mon, Jan)

How to use it

  1. Type or paste your cron expression.
  2. The explanation updates instantly.
  3. Check 'Next runs' to verify the schedule.

Use cases

  • Understanding unfamiliar cron jobs in production systems
  • Verifying a new cron expression before deploying
  • Documenting scheduled tasks for team members

Limitations

  • Next run examples are calculated in the browser using the local timezone.
  • Very large input can be slower on older devices.
  • This utility is designed for common snippets and local inspection, not as a full security or language-specific validator.
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Questions & answers

Frequently asked

Does it support @reboot or @hourly shorthands?

Yes. Common shorthand aliases like @hourly, @daily, @weekly, @monthly, and @reboot are explained.