Free Cron Expression Generator - Build Cron Jobs Visually

A The asterisk (*) is a wildcard meaning every possible value. For example, * in the minute field means every minute.

A Use the expression 0 0 * * * which means at minute 0, hour 0, every day, every month, every weekday.

A Our cron expression generator simplifies complex schedules like the first Monday of every month. Navigate to the 'Day of Week' field and select 'Monday'. Then, use the advanced options to specify '1st occurrence' within the month. The tool's visual dropdowns will guide you to combine these, generating the correct expression, typically `0 0 * * MON#1`. You can then instantly preview the next execution dates to confirm your schedule.

A Our Cron Expression Generator provides a live preview feature that instantly displays the next upcoming execution dates and times for any expression you build. This visual feedback helps you quickly verify that your cron schedule precisely matches your intended timing, eliminating common errors and ensuring your automated tasks run exactly when expected without needing to manually test or guess.

A Our Cron Expression Generator makes this simple. Navigate to the 'Hour' field and select each desired hour (e.g., 9, 13, 17 for 9 AM, 1 PM, 5 PM). The tool will automatically combine these into a comma-separated list, resulting in an expression like `0 9,13,17 * * *`. The live preview immediately shows that your task will execute precisely at these specified times every day, ensuring accurate scheduling.

A Yes, you can. Set the minute field to */15 for every 15 minutes. Then restrict the hour field to 9-17 for a 9-to-5 schedule. The tool will display an expression like */15 9-17 * * *. Check the live preview to confirm it skips evenings and weekends. Pro tip: add a weekday restriction like 1-5 if you want Monday through Friday only.

A This is a common gotcha. When you specify both day-of-month (like 15) and day-of-week (like 3 for Wednesday), cron treats them as OR conditions by default. So the task runs on the 15th OR every Wednesday. Our generator avoids this confusion: if you select both fields, it shows a warning and lets you choose between OR behavior or using a comma-separated list. For example, to run only on the 15th AND it's a Wednesday, you'd need a separate script check.

A Absolutely. Set the minute field to 0, then use */2 in the hour field for every 2 hours. Add 1-5 in the day-of-week field. That gives you "0 */2 * * 1-5". Our tool's live preview will show it firing at 00:00, 02:00, 04:00 and so on, Monday through Friday only. Double-check the preview around midnight to avoid surprises.

A No — */5 in the minute field means every 5 minutes, not seconds. Cron doesn't have a seconds field at all. Our generator shows this clearly: selecting */5 for minutes gives you runs at :00, :05, :10, and so on. One common mistake is thinking you can get sub-minute intervals. You can't with standard cron. For 5-second intervals, you'd need a different solution like a loop inside your script or a dedicated scheduler.

A This trips up nearly everyone at some point. Standard cron treats those two fields as OR, not AND. So `15 15 * * 1` fires on the 15th of every month AND every Monday. Our generator catches this: when you select both fields, a yellow warning appears. Click the toggle to force AND logic, or use our 'advanced mode' to add a script-side check. Pro tip: always verify next five runs in the live preview before deploying.