Crontab Guru — Cron Expression Explainer
Parse and explain cron expressions in plain English. See the next 5 scheduled run times. Supports standard 5-field crontab syntax.. Gratis, sin registro, funciona en tu navegador.
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Paste or type any 5-field cron expression and instantly see what it means in plain English, plus the next 5 scheduled run times. Supports all standard crontab syntax: wildcards (*), steps (*/5), ranges (1-5), and lists (1,3,5). Use the preset buttons for common schedules like 'every hour', 'weekdays at 8am', or 'first day of month'. A quick-reference table shows all supported syntax at a glance.
Preguntas frecuentes
What is crontab syntax?
Crontab uses 5 fields separated by spaces: minute (0-59), hour (0-23), day of month (1-31), month (1-12), and day of week (0-6, where 0=Sunday). Special characters include * (any), */N (every N), N-M (range), and N,M,O (list).
What does */5 * * * * mean?
This runs every 5 minutes, every hour, every day. The */5 in the minute field means 'every 5th minute' — so at :00, :05, :10, :15, and so on.
How do I schedule a job for weekdays only?
Use 1-5 in the day-of-week field (Monday through Friday). For example, '0 9 * * 1-5' runs at 9:00 AM every weekday. Use 0,6 for weekends only (Sunday and Saturday).
Does this support 6-field cron (with seconds)?
This tool supports the standard 5-field crontab format used by Unix/Linux cron, most CI/CD systems, and cloud schedulers. Some systems add a 6th field for seconds — if you have a 6-field expression, remove the first field (seconds) to use this tool.