Cron Expression Parser

A cron expression is a string of 5 (or 6) fields representing a schedule: minute, hour, day of month, month, and day of week. It's used in Unix-like systems and task schedulers to define recurring jobs.

The asterisk (*) means 'every possible value' for that field. For example, * in the minute field means every minute, and * in the hour field means every hour.

Use */5 * * * *. The /5 means 'every 5th value'. So */5 in the minute field means at minutes 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, and 55.

Standard cron uses 5 fields (minute, hour, day, month, weekday). Some systems like Spring add a 6th field for seconds at the beginning. This tool supports both formats.

No. All parsing and schedule calculation happens entirely in your browser using JavaScript. Your data never leaves your device.