Scheduling utility
Cron Expression Parser
Validate a five-field cron expression and explain each field.
● This tool runs entirely in your browser. Your input is never uploaded to our servers.
Output
Your result will appear here…
How to use Cron Expression Parser
- Enter five space-separated cron fields.
- Select Parse to validate the ranges and steps.
- Review the explanation for each field.
Example
Input:
*/15 9-17 * * 1-5
Output:
Minute: every 15 values Hour: 9 through 17 Day of month: every day Month: every month Day of week: Monday through Friday
Use cases
- Review a cron value in a config file.
- Catch invalid field ranges.
- Explain a schedule to a teammate.
About this tool
Validate a five-field cron expression and explain each field. Processing happens locally in your browser, so your input is not sent to a server or included in analytics.
Frequently asked questions
Which syntax is supported?
This parser supports five fields with wildcards, numbers, lists, ranges, and positive step values.
Are names such as JAN or MON supported?
No. Use numeric month and weekday values in this version.
Does the parser predict the next run time?
No. It validates and explains the expression but does not calculate upcoming run times.