What is the UNIX Cron Expression Explainer?
Build a standard 5-field UNIX cron expression field by field, or start from a common preset, and this tool translates it into a plain-English description of when the job runs.
How it works
It splits the cron string into its five fields (minute, hour, day-of-month, month, day-of-week) and matches known patterns — wildcards, step values like */5, ranges like 1-5 — to assemble a plain-language sentence; a handful of very common expressions (like `0 0 * * *`) are matched directly for the clearest wording.
SysAdmin & security use cases
- Confirming a new crontab entry actually runs when intended before deploying it to a server.
- Understanding a cron expression left behind by a previous engineer.
- Building a weekday-only or business-hours schedule without cron syntax trial-and-error.
- Working out the schedule expression for a GitHub Actions or Kubernetes CronJob.