What is Cron Expression Validator?
Cron Expression Validator parses and explains cron schedules. Enter a cron expression to see human-readable descriptions of when it runs and upcoming execution times.
Common Use Cases
Schedule Verification
Confirm cron jobs run at intended times.
Debugging
Understand existing cron expressions.
Learning
Learn cron syntax with instant feedback.
Documentation
Generate descriptions for cron schedules.
How to Use This Tool
- Enter a cron expression (5 or 6 fields)
- View the human-readable description
- See next scheduled execution times
- Adjust fields to modify the schedule
Frequently Asked Questions
What does * mean in cron?
Asterisk (*) means "every" - every minute, hour, day, etc. for that field.
What is */5?
*/5 means "every 5th" - commonly used for running every 5 minutes.
What is the 6th field?
Some systems add a seconds field or year field. Standard cron uses 5 fields.