What are the five cron fields?

A standard cron expression has five fields: minute (0-59), hour (0-23), day of month (1-31), month (1-12) and day of week (0-7, where 0 and 7 are both Sunday). Each field accepts numbers, ranges (1-5), lists (1,3,5), steps (*/15) and an asterisk for 'any'.

What does */15 mean in cron?

A step value. In the minute field, */15 means 'every 15 minutes' · i.e. at minutes 0, 15, 30 and 45. Steps can be combined with ranges, for example 0-30/10.

Are named shortcuts like @daily supported?

Yes. The parser expands @yearly, @annually, @monthly, @weekly, @daily, @midnight and @hourly into their equivalent five-field expressions before explaining them.

Is anything sent to a server?

No. Parsing and next-run calculation happen entirely in your browser.

Crontab Parser & Explainer

Paste a cron expression to see a plain-English explanation and the next scheduled run times. Everything runs in your browser.

Explanation

Enter a cron expression above.

Next 5 runs (local time)

Related tools

How to use

Enter a cron expression

Five fields, or a shortcut like @daily.

Read the explanation

Each field is translated into plain English.

Check next runs

Preview the next five execution times in your local timezone.

Frequently Asked Questions

Minute (0-59), hour (0-23), day of month (1-31), month (1-12) and day of week (0-7, where 0 and 7 are Sunday). Each accepts numbers, ranges, lists, steps and an asterisk.

A step value. In the minute field, */15 means every 15 minutes (0, 15, 30, 45). Steps combine with ranges, e.g. 0-30/10.

Yes · @yearly, @annually, @monthly, @weekly, @daily, @midnight and @hourly are expanded automatically.

No. Everything runs in your browser.

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