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A cron expression schedules a recurring task using five space-separated fields — minute, hour, day of month, month, and day of week — but reading one at a glance is notoriously hard.
This parser translates any standard 5-field cron expression into a plain-English description and shows exactly when it will next run.
How it works
Enter a 5-field cron expression. The parser validates each field, translates common patterns (every N minutes, daily, weekly, monthly) into plain English, and calculates the next 5 times the schedule would actually run.
- Enter cron expression.
- Click Calculate to see your results.
Examples
Running every 15 minutes
*/15 * * * * runs every 15 minutes, all day, every day.
Running on a weekday schedule
0 9 * * 1-5 runs at 9:00 AM, Monday through Friday.
Who should use it
- Double-checking a cron schedule before deploying a scheduled job or task.
- Understanding an unfamiliar cron expression found in someone else's codebase or configuration.
Industry applications
- Software development and DevOps
- Server administration and task scheduling
Advantages
- Translates common schedule patterns into clear plain-English descriptions.
- Calculates the next 5 real run times based on the current date and time.
Limitations
- Only supports the standard 5-field cron format, not extended 6-field formats that include seconds.
Common mistakes to avoid
- Mixing up the field order — day of month comes before month, and day of week is the last field, not the first.
- Forgetting that day of week 0 and 7 both usually mean Sunday, depending on the scheduler.
Best practices
- Always verify a new cron schedule against its next few calculated run times before deploying it, rather than trusting the expression by eye alone.
Tips
- When in doubt about a complex expression, check the calculated next run times rather than relying solely on the plain-English description.