Question 1

What are the five cron fields?

Accepted Answer

From left to right: minute (0-59), hour (0-23), day of month (1-31), month (1-12), and day of week (0-6). An asterisk (*) means every.

Question 2

What does */5 mean?

Accepted Answer

A step value. */5 in the minute field means every 5 minutes. You can combine ranges and steps, like 0-30/10.

Question 3

Does this match my system's cron?

Accepted Answer

It follows standard Unix/Vixie cron syntax used by crontab, which most Linux schedulers and many CI systems share.

Question 4

How do I run a job at a specific time?

Accepted Answer

Set the minute and hour fields. For example, 30 9 * * 1 runs at 09:30 every Monday.

Question 5

Is anything sent to a server?

Accepted Answer

No. The expression and preview are generated entirely in your browser.

Cron Generator