Cron Expression Generator
Build cron expressions visually or parse them into human-readable descriptions. See next execution times. 100% client-side.
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What is a Cron Expression?
A cron expression is a compact string defining a recurring schedule. The original cron daemon was written byKen Thompson for Version 7 Unix released in 1979 — the syntax has remained stable for over 45 years. Today, cron expressions are used far beyond traditional Unix systems: GitHub Actions,AWS EventBridge, GCP Cloud Scheduler,Kubernetes CronJobs, Vercel Cron,Quartz Scheduler (Java), and most CI/CD systems accept cron syntax for time-based triggers.
The 5-field format
* * * * * │ │ │ │ │ │ │ │ │ └── day of week (0-6, Sun-Sat; some support 7 = Sun) │ │ │ └──── month (1-12, or JAN-DEC) │ │ └────── day of month (1-31) │ └──────── hour (0-23) └────────── minute (0-59)
5-field vs 6-field vs 7-field
5-field (Unix, GitHub Actions, AWS EventBridge): minute precision.6-field (Quartz, Spring, K8s): adds seconds at the start.7-field (Quartz Enterprise): adds year at the end. This tool generates 5-field expressions — the most universally supported form.
⚠️ Reference Only
Output is generated based on your input and is provided for reference. Results may vary depending on your specific use case, edge cases, or environment-specific behavior. We do not guarantee accuracy of conversions, validations, or computed values.
Always verify critical outputs against official documentation or production environments. We are not responsible for any decisions or losses based on these tool results.
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