Cron Expression Parser

How to Use

1. Enter a standard 5-field cron expression (minute, hour, day, month, weekday).
2. The tool instantly shows a human-readable description of the schedule.
3. Each field is broken down with its meaning.
4. The next 5 scheduled run times are displayed.

Cron Syntax

• * (asterisk): Every possible value for that field.
• 5: A specific value (e.g., minute 5, hour 5).
• 1-5: A range of values (e.g., Monday through Friday).
• */15: Step values (e.g., every 15 minutes).
• 1,15: A list of values (e.g., the 1st and 15th).

Cron Fields

• Field 1: Minute (0-59)
• Field 2: Hour (0-23)
• Field 3: Day of Month (1-31)
• Field 4: Month (1-12)
• Field 5: Day of Week (0-7, where 0 and 7 are Sunday)

What is a Cron Expression?

A cron expression is a string of five fields that defines a schedule for recurring tasks on Unix-like systems. Originally part of the cron daemon in Unix, the format has been adopted by virtually every scheduling system including cloud services (AWS CloudWatch, Google Cloud Scheduler), CI/CD platforms (GitHub Actions, GitLab CI), and application frameworks. Each field specifies when the task should run: minute, hour, day of month, month, and day of week.

Use Cases

• CI/CD pipelines: Schedule nightly builds, weekly dependency updates, or periodic security scans in your CI/CD system.
• Database backups: Configure automatic backups at off-peak hours to minimize impact on production workloads.
• Monitoring and alerts: Set up health checks, log rotation, or report generation at regular intervals.
• System maintenance: Schedule cache clearing, temporary file cleanup, or certificate renewal tasks.
• Business automation: Run periodic data exports, email digests, or billing calculations on a fixed schedule.

Privacy

All parsing happens in your browser. No data is sent to any server.