Cron Expression Builder
Build, validate, parse, explain, and preview next runs for standard five-field cron expressions locally.
Cron workspace
Build, parse, and explain five-field cron expressions locally.
Build schedule
Standard five-field cron: minute, hour, day of month, month, day of week.
Result
At minute 0, at 09:00, every day of month, every month, Monday through Friday.
Next runs
- 2026-08-13T07:00:00.000Z
- 2026-08-14T07:00:00.000Z
- 2026-08-17T07:00:00.000Z
- 2026-08-18T07:00:00.000Z
- 2026-08-19T07:00:00.000Z
Next runs use this browser's local time. Day-of-month and day-of-week restrictions use common cron OR behavior.
Output
Questions
Which cron format does this support?
It supports standard five-field cron expressions: minute, hour, day of month, month, and day of week.
Does this execute cron jobs?
No. It only builds, validates, explains, and previews cron schedules locally.
How are next runs calculated?
Next runs are calculated in the browser using local time and common five-field cron behavior.
Does Utilumo upload my input?
No. This tool is designed for local browser processing and does not send your input to a server.
Do I need an account?
No. Utilumo tools are built to work without accounts or sign-in.