Developer · free local utility
Check the minute, hour, day-of-month, month, and day-of-week fields of a classic Unix cron schedule.
Enter a five-field expression such as 0 9 * * 1-5. The validator checks ranges, lists, ranges, and steps.
This does not validate a command, timezone, Quartz syntax, AWS EventBridge, or a platform-specific cron dialect.
Always verify the result in the system where you will use it. The page intentionally avoids accounts, uploads, and claims that go beyond the calculation it performs.
No. It intentionally validates the common five-field Unix format only.
That depends on the scheduler and host configuration. The validator cannot determine your runtime timezone.
Scheduler behavior varies. Many Unix cron implementations use OR-like behavior when both fields are restricted, so verify your exact scheduler.