Cron expression generator

This cron expression generator builds a 5-field cron expression from minute, hour, day of month, month and day of week, and shows a plain-English description of what it does.

Common presets

Use the presets for typical schedules — every minute, every hour, every day at 9:00, every Monday at 9:00 or the first of every month — or edit each field to build a custom schedule. The description updates as you type, so you can check the expression means what you expect before pasting it into your crontab or scheduler.

FAQ

What do the 5 fields of a cron expression mean?

In order: minute (0-59), hour (0-23), day of month (1-31), month (1-12) and day of week (0-6, Sunday to Saturday). An asterisk (*) means "every value".

What does an asterisk with a slash mean, like */5?

It means a step: */5 in the minute field runs the job every 5 minutes (0, 5, 10, 15...). You can combine it with any field that supports numeric ranges.

Can I use lists of values?

Yes. Separate values with a comma, for example 1,15 in the day-of-month field runs the job on the 1st and the 15th of every month.