Cron Expression Builder
Build a standard 5-field cron expression using simple fields or common presets, with a plain-English description of what it means.
Plain English: At minute 0, hour 9, every day of the month, every month, day-of-weeks Monday through Friday
Supports *, */n steps, ranges (a-b) and comma lists (a,b,c) for each field. Named months (JAN-DEC) and weekdays (SUN-SAT) aren't supported; use numbers instead.
Frequently asked questions
What format does this generate?+
Standard 5-field cron: minute, hour, day-of-month, month, day-of-week, the format used by crontab, GitHub Actions, and most schedulers.
Does it support 6-field cron with seconds?+
No, only the standard 5-field format. Some systems (like Quartz) use a 6-field variant with seconds, which isn't supported here.
Does it show me the next run times?+
No, it explains what the expression means in plain English rather than calculating upcoming run dates.