Cron Expression Generator & Explainer
Build and understand cron expressions with a visual editor. Presets for common schedules included.
Cron Expression
* * * * *every minute
0-59
0-23
1-31
1-12
0-6 (Sun=0)
Quick Presets
Syntax Reference
* — any value5 — exact value1-5 — range*/15 — every 151,15 — list1-5/2 — range + step
What is a Cron Expression?
A cron expression is a string of five fields that defines a schedule for running commands or scripts automatically. It is used in Unix/Linux cron jobs, CI/CD pipelines, cloud schedulers (AWS CloudWatch, Google Cloud Scheduler), and task automation.
Cron Format
The five fields are: minute (0-59), hour (0-23), day of month (1-31), month (1-12), and day of week (0-6, where 0 is Sunday).