About This Tool

An interactive cron expression builder and explainer for developers and sysadmins. Build schedules visually or paste an expression to understand it.

100% Client-Side

All parsing and next-run calculations happen in your browser. Nothing is transmitted to any server.

Features

• Visual field editors for each cron component
• Human-readable explanation of any expression
• Next 5 scheduled runs calculated in real time
• Quick presets for common schedules
• Supports standard 5-field cron syntax (minute, hour, day, month, weekday)
• Supports wildcards (*), ranges (-), lists (,), and steps (/)

Contact

Questions or feedback? Use the feedback link in the navigation.