Cron Generator
Visual cron expression builder. Presets, human-readable description and next executions.
0 * * * ** = any value */5 = every 5 1,3,5 = list 1-5 = range
About this tool
The Cron Generator provides a visual interface for building cron expressions without having to memorize the syntax of the five fields (minute, hour, day of month, month, day of week). The tool displays a human-readable description of the expression and lists the next five calculated execution times, helping you confirm that the schedule is configured exactly as intended.
To use it, adjust each field individually by typing values, using the available presets (every minute, hourly, daily, weekly, monthly, yearly), or combining wildcards and lists. The cron expression updates in real time and the "Next executions" section displays the actual dates and times when the job will be triggered, letting you confirm that intervals like '0 9 * * 1-5' really do execute at 9 AM only on weekdays.
This tool is used by developers to configure cron jobs on Linux and Unix servers, GitHub Actions schedules, AWS Lambda scheduled events, Kubernetes CronJobs, cPanel scheduled tasks, and any system that accepts standard cron expressions. It is also useful for reviewing expressions written by others and verifying that the behavior is as expected before applying them in production.
All processing and next-execution calculations happen locally in your browser. No data is sent to servers. No account is required.
Frequently asked questions
Do the generated expressions work with all cron-based systems?
The tool generates standard 5-field cron expressions (minute hour day month weekday), compatible with Linux/Unix crontab, AWS EventBridge, Kubernetes CronJob, and most platforms. Systems like Quartz Scheduler (Java) use a 6- or 7-field format including seconds — check your platform's documentation.
What does each field in a cron expression mean?
The five fields from left to right represent: minute (0–59), hour (0–23), day of month (1–31), month (1–12), and day of week (0–7, where both 0 and 7 represent Sunday). The asterisk '*' means 'any value'.
Is this tool free?
Yes, completely free and no signup required.
Is my data sent to any server?
No. Next-execution calculations and description generation happen entirely in your browser.
Does it work on mobile?
Yes. The interface is responsive and works well on smartphones for quickly looking up or building cron expressions.