Cron Expression Parser — Free Online Tool
Enter any standard cron expression (5 or 6 fields) and instantly see what it means in plain English, plus the next 5 scheduled execution times in your local timezone. Useful for writing and debugging cron jobs in CI/CD pipelines, cloud schedulers, and server automation.
100% client-side. No uploads. Your data never leaves your browser.
How to use Cron Expression Parser
- Enter a cron expression (e.g. '0 9 * * 1-5' for 9 AM on weekdays).
- The plain-English translation appears immediately below.
- Scroll down to see the next 5 scheduled run times in your browser's timezone.
- Edit the expression and the translation updates in real time.
Frequently Asked Questions
What cron format is supported?
Standard 5-field cron (minute hour day month weekday) and 6-field with seconds. Also supports common non-standard extensions like @hourly, @daily, @weekly, and @monthly.
Does this support AWS EventBridge or Kubernetes CronJob syntax?
The tool supports standard cron syntax used by most Unix schedulers. AWS EventBridge uses a slightly different format (year field, ? for day-of-month/weekday). Some expressions may not parse correctly.
How are the next run times calculated?
Using the cronstrue library for human-readable translation and native Date arithmetic for computing the next 5 scheduled times from the current moment.
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