Cron Expression Parser
Enter a cron expression to see its human-readable description and upcoming run times.
Cron Expression Parser
Enter a cron expression to see its human-readable description and upcoming run times.
About cron expression parsing
Validate five-field or seconds-enabled schedules
Enter a standard five-field cron expression, or enable the seconds field when your scheduler uses six fields. You can edit the expression as one string or split it by field, then review the localized plain-language description and the next five run times.
Timeline and heatmap for schedule debugging
The visualization panel uses the selected timezone to plot the next 50 runs and a weekly per-hour trigger density for the next seven days, with an iteration guard for very dense expressions. Use it to inspect schedule shape; it does not run jobs or replace your scheduler's own timezone rules.
FAQ
Common questions and answers about this topic.
What is a cron expression?
A cron expression is a string of five or six fields representing a schedule — minute, hour, day of month, month, and day of week. Used in Unix-like systems and CI/CD pipelines to schedule recurring tasks.
What cron format is supported?
Standard 5-field cron expressions. Some tools also support a 6th field for seconds.
Can I see when the next runs will occur?
Yes, the parser shows upcoming execution times based on your cron expression.
Is my data sent to any server?
No, cron expression parsing runs entirely in your browser. Your schedule expressions are interpreted locally with JavaScript and never sent to any server.