Cron Expression Explainer
Paste a minute/hour/day-of-month/month/day-of-week cron expression and see how common wildcard, step, list and range syntax is interpreted.
minute 0; hour 9; every day of month; every month; day of weeks 1-5
This parser explains common five-field cron syntax. Named months/days and platform-specific extensions are not expanded.
How this tool works
The parser validates the five-field structure and explains each field independently. It does not execute or schedule jobs.
Example
0 9 * * 1-5 is interpreted as minute 0, hour 9, every day of month, every month, and weekdays 1 through 5.
Common questions
Does this support Quartz cron syntax?
No. It targets the common five-field Unix-style form and does not expand platform-specific seconds, year or special symbols.
Does it calculate the next run time?
No. This version focuses on explaining the expression, avoiding assumptions about timezone and platform behavior.