What this tool does
A cron expression is five fields — minute, hour, day of month, month, day of week — evaluated in the server's local time. This builder validates each field, explains the schedule in plain language and previews the next five runs, so mistakes surface before deployment.
How to use it
- Start from a preset or edit the five fields.
- Read the plain-language description.
- Check the next runs, then copy the expression.
Questions
Does it include seconds?
No, this uses classic five-field cron. Some schedulers require a sixth seconds field at the start.
How do day-of-month and day-of-week combine?
In classic cron, when both are restricted, the job runs if either matches. Some modern schedulers use AND instead.
Which timezone is used?
Your browser's local timezone for the preview. Cron itself runs in the server's timezone, which may be UTC — check before deploying.