Cron Expression Generator

Assemble and validate a 5-field cron expression for Linux crontab, Kubernetes CronJobs and CI schedules.

Minute (0–59)

Hour (0–23)

Day of month (1–31)

Month (1–12)

Day of week (0–6)

How to Use the Cron Expression Generator

Enter each of the 5 cron fields.
Use * for "every".
Click Calculate to see the joined expression.

Casos de Uso

•Drafting Kubernetes CronJob schedules.
•Adding GitHub Actions cron triggers.
•Managing server crontabs for backups.

Fórmula

cron = minute hour day-of-month month day-of-week. Each field accepts digits, *, , - and /.

Perguntas Frequentes

Day-of-week 0 or 7 for Sunday?

Classic Vixie cron accepts both 0 and 7 for Sunday. Kubernetes and GitHub Actions follow the same convention.

What does the slash mean?

Step values. */5 in the minute field means "every 5 minutes starting at 0". 0-30/10 means "every 10 minutes between 0 and 30".

Why validate with a regex?

A strict whitelist of digits, *, , - and / catches ~95% of typos without needing a full cron parser. For production, complement it with a dry-run on a scheduler.