Crontab Expression Tester
Parse cron expressions — see plain English explanation and next 10 execution times
Quick Presets
Valid cron expression
At 09:30 AM, every Monday
Field Breakdown
at minute :30
Valid: 0–59
09:00 AM
Valid: 0–23
every day of the month
Valid: 1–31
every month
Valid: 1–12 or JAN–DEC
Monday
Valid: 0–7 or SUN–SAT
Next 10 Execution Times
- 12026年4月6日周一 09:30
- 22026年4月13日周一 09:30
- 32026年4月20日周一 09:30
- 42026年4月27日周一 09:30
- 52026年5月4日周一 09:30
- 62026年5月11日周一 09:30
- 72026年5月18日周一 09:30
- 82026年5月25日周一 09:30
- 92026年6月1日周一 09:30
- 102026年6月8日周一 09:30
Cron is the standard job scheduler on Unix-like systems. A cron expression defines when a job runs using five fields: minute, hour, day of month, month, and day of week. This tool parses any cron expression, explains it in plain English, and calculates the next 10 execution times.
Cron Field Reference
┌───────────── minute (0-59)
│ ┌───────────── hour (0-23)
│ │ ┌───────────── day of month (1-31)
│ │ │ ┌───────────── month (1-12 or JAN-DEC)
│ │ │ │ ┌───────────── day of week (0-7 or SUN-SAT, 0 and 7 = Sunday)
│ │ │ │ │
* * * * *Special Characters
*— Any value (every minute, every hour, etc.),— Value list separator (1,3,5= first, third, and fifth)-— Range (1-5= Monday through Friday)/— Step values (*/5= every 5 minutes,1-30/2= odd minutes 1-29)
Common Patterns
0 * * * *— Every hour on the hour*/5 * * * *— Every 5 minutes0 9 * * 1-5— 9 AM on weekdays0 0 1 * *— Midnight on the first of each month0 0 * * 0— Midnight every Sunday
Cron vs Cron Extensions
This tool supports the standard 5-field cron format used by crontab, systemd timers, and most CI/CD platforms. Some systems support 6-field or 7-field variants (adding seconds or year) — those are non-standard extensions.