Cron Expression Parser
Instantly parse any cron expression into a plain-English description and preview the next 10 scheduled run times. All processing runs in your browser — nothing is uploaded.
Common patterns
Frequently Asked Questions
- Is this cron parser free?
- Yes, 100% free. No account needed, no usage limits.
- Are my cron expressions kept private?
- All parsing runs locally in your browser using JavaScript. Nothing is sent to any server.
- What is a cron expression?
- A cron expression is a string of five fields (minute, hour, day-of-month, month, day-of-week) used to define a recurring schedule for automated tasks. For example, '0 9 * * 1-5' means 'every weekday at 9:00 AM'.
- What special characters are supported?
- The parser supports * (any value), , (list), - (range), and / (step). For example, */5 in the minute field means every 5 minutes, and 1-5 in the weekday field means Monday through Friday.
- Why do some expressions fail to parse?
- Standard cron uses exactly 5 fields. Non-standard extensions like @yearly, @reboot, or 6-field expressions with seconds may not be supported by all parsers. Ensure your expression has exactly 5 space-separated fields.
- Does it work on mobile?
- Yes, works on all modern browsers including mobile Safari and Chrome on iOS and Android.