What this tool does
Cron expressions are compact but easy to misread, and a single wrong field can run a job at the wrong time. This tool takes any standard five-field expression and translates it into a plain-English description of when it runs, field by field. Pick a preset to start from a common schedule, then adjust. It runs entirely in your browser.
Frequently asked questions
What do the five fields mean?
In order they are minute, hour, day of month, month, and day of week. An asterisk means every value, a number means a specific one, and you can combine them with commas, ranges, and steps like every five minutes.
How do I run a job every 15 minutes?
Use the step syntax in the minute field with an asterisk elsewhere. The expression is 0,15,30,45 * * * * or the shorter form with a step, which this tool will read back for you.
Does the day of week start at zero?
Yes. Sunday is 0 and Saturday is 6. Some systems also accept 7 for Sunday. Ranges like 1-5 cover Monday through Friday, which is the common way to say weekdays.