Cron Expression Generator

What is a Cron Expression?

Cron is the time-based job scheduler used on Unix and Linux systems and, increasingly, in cloud platforms and CI/CD pipelines. A cron expression is a compact string of five fields — minute, hour, day of month, month, and day of week — that defines exactly when a recurring task should run.

The syntax is powerful but easy to get wrong. Our Cron Expression Generator lets you build a schedule with quick presets or by editing each field directly, and it translates the result into a plain-English sentence so you can confirm the timing at a glance.

The Five Cron Fields

• Minute (0–59) — the minute of the hour the job runs
• Hour (0–23) — the hour of the day, in 24-hour format
• Day of month (1–31) — the calendar day
• Month (1–12) — the month of the year
• Day of week (0–6) — the weekday, where 0 is Sunday

Cron Syntax Basics

An asterisk (*) means every value for that field. A specific number means exactly that value. A step value like */5 in the minute field means every 5 minutes. You can combine fields to express schedules such as 'every day at 9:00 AM' (0 9 * * *) or 'every Monday at midnight' (0 0 * * 1).

Getting the fields right matters: a misplaced value can make a job run far more or less often than intended. The plain-English description in this tool is designed to catch exactly those mistakes before you deploy the schedule.

Where Cron Expressions Are Used

Cron schedules drive server maintenance tasks like backups and log rotation, trigger scheduled jobs in frameworks and queue systems, run recurring workflows in GitHub Actions and other CI tools, and power scheduled functions on cloud platforms. Anywhere something needs to happen on a regular timetable, a cron expression usually defines it.