Cron Expression Explainer
Enter a cron expression (e.g. 0 9 * * 1-5) to see a description and the next run times.
Next 5 run times
Enter an expression and click Explain.
About Cron Expressions
Cron is used by Unix-like systems and many schedulers (e.g. GitHub Actions, CI) to define when a job runs. This tool explains the five fields and computes the next run times in your local timezone so you can verify your schedule without running the job.
Frequently Asked Questions
What format does cron use?
Standard cron has five fields: minute (0-59), hour (0-23), day of month (1-31), month (1-12), day of week (0-7, 0 and 7 = Sunday). Use * for any, commas for lists, hyphens for ranges, and / for step (e.g. */5 for every 5).
Is my data sent to a server?
No. Parsing and next-run calculation happen entirely in your browser. Nothing is uploaded.
How many next run times are shown?
The tool shows the next 5 run times from now, limited to about one year ahead to keep results fast.