Cron Expression Tester & Validator

Validate your cron expressions, understand what they mean, and see exactly when they'll run.

Enter cron expression

Format: 5-field (standard) 6-field (with seconds)

Valid Expression

This cron expression is syntactically correct

Field breakdown

In plain English

At 9:00 AM, Monday through Friday

Next 5 run times

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Cron Syntax Reference

Cron Expression Format

┌───────────── minute (0-59)
│ ┌───────────── hour (0-23)
│ │ ┌───────────── day of month (1-31)
│ │ │ ┌───────────── month (1-12)
│ │ │ │ ┌───────────── day of week (0-6, Sunday=0)
│ │ │ │ │
* * * * *

Special Characters

Character	Meaning	Example
*	Any value	* * * * *
,	Value list separator	1,15 * * * *
-	Range of values	* 9-17 * * *
/	Step values	/15 * * *

Common Patterns

Expression	Description
* * * * *	Every minute
/5 * * *	Every 5 minutes
0 * * * *	Every hour
0 0 * * *	Daily at midnight
0 9 * * 1-5	Weekdays at 9:00 AM
0 0 1 * *	First day of every month
0 0 * * 0	Every Sunday at midnight