⏰

Cron Expression Generator

Create cron schedule expressions easily

* * * * *

Every minute, Every hour

Minute

0-59

Hour

0-23

Day of Month

1-31

Month

1-12

Day of Week

0-6 (Sun-Sat)

Presets

Reference

* Any value

*/n Every Nth

n,m Specific values

n-m Range

The Cron Expression Generator provides a visual interface for building standard cron schedule expressions used in Linux/Unix job scheduling. Set each of the five fields (minute, hour, day, month, weekday) through an intuitive GUI and instantly see the generated expression along with upcoming execution times. Compatible with Jenkins, GitHub Actions, AWS CloudWatch, Kubernetes CronJobs, and other scheduling systems.

📖 How to Use

Set each field (minute, hour, day, month, weekday)
Use presets for quick configuration
View the generated cron expression
Copy the expression for your scheduler

✨ Features

✓Visual cron builder
✓Common presets provided
✓Real-time next run time display
✓Field descriptions provided
✓Standard 5-field cron support

💡 Use Cases

•DevOps Engineer: Generate cron expressions for CI/CD pipeline schedules like nightly builds and weekly deployments.
•Backend Developer: Configure schedules for recurring tasks such as database backups, cache purging, and report generation.
•System Administrator: Build accurate crontab entries and verify next run times before deploying to production.
•Data Engineer: Define batch job schedules for ETL pipelines and validate execution timing.
•Student: Learn the meaning of each cron field through an interactive visual builder rather than memorizing syntax.
•Full-Stack Developer: Quickly generate expressions for node-cron, Spring @Scheduled, or Celery Beat configurations.

🎯 Tips

▸Start with a preset, then adjust individual fields — it's faster than building from scratch for common schedules.
▸Always verify the 'Next run times' preview after generating an expression. The schedule may differ from what you intended.
▸Setting day-of-month to 31 means the job won't run in months with fewer days. Use alternatives for end-of-month schedules.
▸*/5 means 'every 5th'. For example, */5 in the minute field triggers at 0, 5, 10, 15, and so on.
▸In the weekday field, both 0 and 7 represent Sunday. Check your target system's documentation for compatibility.

❓ FAQ

Q. What is a cron expression?

A. A format defining job schedules using 5 fields in order: minute, hour, day, month, weekday.

Q. How do I run every Monday at 9 AM?

A. Use '0 9 * * 1'. Or select 'Every Monday' from presets.

Q. What's the difference between 5-field and 6-field cron?

A. Standard Unix cron uses 5 fields (minute, hour, day, month, weekday). Some systems like Spring and Quartz add a seconds field for 6-field expressions. This tool generates the standard 5-field format.

Q. Can I set a specific timezone?

A. Cron expressions themselves don't contain timezone information. Execution is based on the server's system timezone. Verify your server's timezone setting and adjust your expression accordingly.

Q. Does this work with AWS and GitHub Actions?

A. Yes. Most cloud services and CI/CD tools support standard cron expressions. Note that AWS CloudWatch uses 6 fields, and some systems have minor syntax variations. Always check the platform's documentation.