Cron Expression Builder & Explainer
Build, parse, and decode standard 5-part cron expressions with human-readable explanations and upcoming run times.
Build, decode, and schedule standard 5-part cron expressions with plain English explanations and live upcoming execution times.
Generated Cron Expression
* * * * *
Schedule Meaning
Every minute, every day, every month.
Interactive Field Builder
Common Presets
Next 5 Scheduled Executions (UTC)
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What is the Cron Expression Builder & Explainer?
The Cron Expression Builder provides a visual interface for creating standard 5-part cron schedules (minute, hour, day-of-month, month, day-of-week), translates expressions into plain English, and calculates the next 5 upcoming UTC execution timestamps.
Who is the Cron Expression Builder & Explainer for?
Built for backend developers, DevOps engineers, system administrators, and site reliability engineers configuring crontab jobs, GitHub Actions schedules, and AWS EventBridge rules.
How to Use the Cron Expression Builder & Explainer
- Select desired schedule intervals using the 5 field dropdowns or click a common preset.
- Read the real-time plain English schedule explanation.
- Verify upcoming execution timestamps in the live schedule preview.
- Copy the verified cron expression.
Worked Example
Frequently Asked Questions
What does the 5-field cron syntax represent?
The 5 fields represent in order: 1) Minute (0-59), 2) Hour (0-23), 3) Day of Month (1-31), 4) Month (1-12), and 5) Day of Week (0-6, where 0=Sunday).
What does */5 mean in cron?
The slash (/) denotes a step value. '*/5' in the minute position triggers execution every 5 minutes (minute 0, 5, 10, 15, etc.).
What is a 5-part cron expression?
A 5-part cron expression consists of: [Minute] [Hour] [Day of Month] [Month] [Day of Week]. It is the universal standard used by Linux crontab, GitHub Actions, AWS EventBridge, and Kubernetes CronJobs.
How does the day-of-week numbering work?
Standard cron uses 0 or 7 for Sunday, 1 for Monday, 2 for Tuesday, up to 6 for Saturday. Ranges like 1-5 represent Monday through Friday.
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