Cron Parser & Builder
Build and parse cron expressions with human-readable descriptions and next run times
Enter a cron expression to parse it
Supports standard 5-field cron syntax with ranges, lists, steps, and wildcards. All processing happens locally in your browser.
About Cron Parser
Parse and build cron expressions with a human-readable description and a preview of upcoming execution times. Cron expressions define recurring schedules in Unix cron jobs, CI/CD pipelines, Kubernetes CronJobs, cloud scheduler services, and task automation systems. This tool accepts standard five-field cron expressions (minute, hour, day-of-month, month, day-of-week), translates them to plain English, and calculates the next scheduled run times from the current moment. All parsing runs locally in your browser.
How to Use Cron Parser
- Enter a five-field cron expression (e.g. 0 9 * * 1-5 for weekdays at 9 AM).
- Read the human-readable description of the schedule.
- Review the list of next upcoming execution times.
- Adjust the expression and see results update in real time.
Cron Parser FAQ
What cron format is supported?
The parser accepts standard five-field cron expressions: minute (0-59), hour (0-23), day of month (1-31), month (1-12), and day of week (0-6, where 0 is Sunday).
Can I preview upcoming run times?
Yes. The tool calculates and displays the next several scheduled execution times from the current moment.
What do special characters mean in cron?
* means every value, , separates list items, - defines ranges, and / defines step values. For example, */5 in the minute field means every 5 minutes.
Can I use this for Kubernetes CronJobs?
Yes. Kubernetes CronJobs use the standard five-field cron format, which is exactly what this tool parses. The expression you build here can be used directly in your CronJob spec.
Is my cron expression sent to a server?
No. All parsing and schedule calculation happens locally in your browser.