Five fields
Formalint parses the common cron format used by many schedulers: minute, hour, day of month, month and day of week.
Browser-based developer tools
Cron Parser
Explain standard five-field cron expressions and preview upcoming local run times.
Supports standard five-field cron: minute hour day-of-month month day-of-week.
Reference notes
Schedule checks before production
Preview runs
Upcoming local run times help catch range, step and weekday mistakes before schedules go live.
Scheduler differences
Some platforms support seconds, years or special tokens. Always compare against your production scheduler documentation.
Frequently asked
Cron expression questions
What do the five fields in a cron expression mean?
In order, they represent minute, hour, day of month, month, and day of week. A common mistake is confusing the order of day-of-month and day-of-week, since both accept overlapping ranges of values.
What is the difference between * and ? in some cron systems?
Standard cron only uses *, meaning every value. Some schedulers like Quartz add ? to mean no specific value, used to avoid conflicts when both day-of-month and day-of-week are set to specific values.
What time zone do the upcoming run previews use?
Previews are calculated using your browser's local time zone. Production schedulers often run in UTC or a server-configured time zone, so double-check the target environment before deploying.