Cron Expression Parser & Run-Time Preview

Enter a crontab expression and a starting time. This previews a schedule; it does not register or run a job.

Runs locally in your browser

Cron schedule

Expression minute hour day-of-month month day-of-week

Preview from

This tool supports standard five-field crontab syntax: wildcards, lists, ranges, steps, and month/day names. It does not execute or register jobs.

Field explanation

Enter an expression to see a field-by-field explanation.

Next occurrences

Preview the next scheduled run times after validating an expression.

Read cron timing before it runs in production

Use the preview to catch range, step, and weekday mistakes. When both day-of-month and day-of-week are restricted, the preview follows common crontab OR semantics.