Cron Expression Generator
Build a cron expression and see a plain-English explanation.
🔒 Runs entirely in your browser — nothing is uploaded.
How Cron Expression Generator works
How does this cron expression generator work?
Five text fields - minute, hour, day-of-month, month, and day-of-week - are joined with spaces into a standard 5-field cron string. A plain-language description is built alongside it by checking each field: a wildcard (*) becomes "every minute/hour/day," and any other value becomes "at minute X" or "on day X."
What is a cron expression used for?
Cron expressions schedule recurring jobs on Linux servers, in CI pipelines, and in tools like Kubernetes CronJobs - for example running a backup script at 2 a.m. daily or sending a report every Monday morning.
Does it validate the cron syntax I type?
No - it just concatenates whatever is in the five fields into a string, so typing an out-of-range value like 99 in the minute field will not raise an error. Stick to the five presets (every minute, hourly, daily, weekly, monthly) for a guaranteed-valid starting point, then edit from there.