ops@toolbox:~$ cron --visualize

Cron Schedule Visualizer

Input a standard crontab expression to see a plain-English explanation, visual daily timeline, and a list of the next 50 upcoming execution times.

Cron Expression (5 fields)

Timezone

Matches: every 15 minutes, between 08:00 AM and 05:59 PM, Monday through Friday

Hourly Run Patterns

Highlights the active hours of the day (in selected timezone) where triggers occur.

12 AM6 AM12 PM6 PM11 PM

Day of Week Patterns

Highlights active weekdays (Green = active, Dark = inactive).

Sun

Mon

Tue

Wed

Thu

Fri

Sat

Next 50 Executions

#	Execution Time	Relative Time

Crontab syntax guide

Standard crontab expressions consist of 5 fields separated by spaces: * * * * * (Minute, Hour, Day of Month, Month, Day of Week).

* matches any value.
, separates a list of values (e.g. 1,3,5).
- specifies a range of values (e.g. 1-5).
/ specifies steps (e.g. */10 means every 10 units).

Standard vs non-standard cron engines

System administrators encounter minor differences depending on the platform. Linux standard cron checks day-of-week AND day-of-month: if both are restricted, the job runs if either matches. Other engines (like Spring, Kubernetes, or serverless triggers) treat them as an AND logic or use 6 fields (adding seconds or years). This tool visualizes standard Linux system cron behavior.

Related tools

Cron Expression Generator

Build crontab expressions visually with drop-downs.

Cron → systemd Converter

Translate crontab rules into OnCalendar systemd units.

Unix Timestamp Converter

Convert epoch timestamps to dates and back.