Cron Expression Builder
Build and parse cron expressions with a visual editor and next-run preview.
Cron Expression
Minute (0-59)
Hour (0-23)
Day (1-31)
Month (1-12)
Weekday (0-6)
Next 5 Runs
Quick Presets
Frequently Asked Questions
Does this support 6-field cron expressions with seconds?
No. This tool only accepts the classic 5-field format: minute, hour, day of month, month, and weekday.
Can I use weekday names like MON or Sunday = 7?
No. The validator only accepts digits and cron operators, and weekday values must be in the 0-6 range here. Some cron implementations allow 7 for Sunday, but this tool does not.
How does it treat day-of-month and day-of-week when both are restricted?
This implementation checks both fields together, so both conditions must match before a run is listed. That can differ from cron variants that treat those fields more loosely.
How are the next run times calculated?
The tool starts from the next minute in your local browser time and brute-forces forward minute by minute until it finds the next 5 matches.
What cron syntax does it understand?
It supports *, comma lists, numeric ranges like 1-5, and step values like */15 or 1-10/2.