Cron Next Run Preview
Calculate date and time values locally with visible assumptions and copy-ready results.
Use calendar math with the assumption visible
Use it before saving a cron job, documenting automation, checking weekday schedules, or catching a field order mistake. Cron mistakes usually come from field order, so this preview checks future minutes against each field visibly.
The preview checks future minutes against a five-field cron expression and lists the first matching times. */15 9-17 * * 1-5 means every 15 minutes during weekday business hours. The weekday business-hours example shows why */15 alone is not enough to understand a full five-field schedule.
Limits and local processing
This lite preview supports common numbers, ranges, stars, steps, and comma lists, but not named months or advanced Quartz syntax. The expression is scanned locally in the browser against generated future minutes. For production jobs, confirm syntax against your scheduler if it uses Quartz, seconds fields, or named months. Previewing multiple upcoming runs is also a quick way to spot jobs that fire hourly when you meant weekday mornings only.
Frequently Asked Questions
How does the cron next run preview work?
The preview checks future minutes against a five-field cron expression and lists the first matching times. */15 9-17 * * 1-5 means every 15 minutes during weekday business hours.
When should I use this tool?
Use it before saving a cron job, documenting automation, checking weekday schedules, or catching a field order mistake.
What should I watch out for?
This lite preview supports common numbers, ranges, stars, steps, and comma lists, but not named months or advanced Quartz syntax.
Is this date tool private?
Yes. It runs entirely in your browser, so dates, schedules, and notes are not uploaded or stored.
More free browser utilities for planning, formatting, and technical cleanup.