About the Cron Expression Tool
Cron syntax is compact but easy to get subtly wrong — a misplaced field can mean a job runs every minute instead of once a day. This page breaks an expression down field by field, tells you in plain language what it means, and lists the next times it would actually fire, so you can double-check a schedule before it ships to a server. A built-in generator can also build the expression for you from simple choices.
Things you can do here
- •Type or paste an expression — get an immediate breakdown of the minute, hour, day-of-month, month, and day-of-week fields.
- •Use the simple generator — build a schedule from plain options instead of memorizing cron syntax.
- •Preview upcoming run times — see the next several times the schedule would actually trigger.
- •Catch mistakes early — invalid or ambiguous expressions are flagged with a clear explanation.
- •Copy — copy the final expression straight to your clipboard.