Cron generator

Minute, hour, day-of-month, month, day-of-week. Use wildcards, lists, ranges and steps.

Before production, validate generated expressions against expected run times and timezone behavior.

1. Pick the minute and hour, then choose how often the job repeats (every day, specific weekdays, or a day of the month).
2. Read the generated expression and the plain-English summary side by side.
3. Check the upcoming run-time preview to confirm the cadence matches your intent before copying.

Common patterns: */15 * * * * every 15 minutes, 0 9 * * 1-5 at 9am on weekdays, 0 0 1 * * at midnight on the 1st.

The biggest trap is timezone: cron daemons usually run in the server's timezone (often UTC), not your local time, so a job set for 9am may fire hours off. Day-of-month and day-of-week are combined with OR in classic cron, not AND — setting both can fire more often than expected. This release targets standard 5-field cron, so Quartz tokens like L, W and # are not generated.

Everything is computed locally in your browser; nothing is uploaded.

Use this tool for quick browser-based work when you need an answer or output immediately. Use a dedicated application or automated workflow when you need bulk processing, approvals, or repeatable production rules.