About Cron Expression
Cron expression generator creates and parses Cron expressions online with visual time selection, real-time execution preview, expression validation. Essential for Linux cron jobs, task scheduling, automation scripts.
How to Use
- Visually select minute/hour/day/month/weekday
- Auto-generate Cron expression
- Preview future execution times
- Copy expression for crontab
Frequently Asked Questions
- What do the 5 Cron fields mean?
- In order: minute (0-59), hour (0-23), day (1-31), month (1-12), weekday (0-6, 0=Sunday). E.g., '0 2 * * *' = daily at 2am.
- What does */5 mean?
- */5 = execute every 5 units. */5 in minute field = every 5 minutes, in hour field = every 5 hours. * = every unit, / = step.
- Can I specify both day and weekday?
- Yes but be careful. Day and weekday are OR not AND. '0 0 1 * 1' isn't 'every 1st that is Monday', it's 'every 1st OR every Monday'.