Cron Expression Builder
Build 5-field cron expressions, read a human-friendly explanation, and preview upcoming runs.
Builder
| Field | Value | Help |
|---|---|---|
0-59, *, */n, a-b, a,b |
||
0-23, *, */n, a-b, a,b |
||
1-31, *, a-b, a,b |
||
1-12, *, a-b, a,b |
||
0-6 (Sun=0), *, a-b, a,b |
Explanation
Description: —
Notes: —
Next run times (local timezone)
Preview is computed in your browser using your local time settings (including DST rules).
About this cron builder
This tool creates 5-field cron expressions and explains what they do in plain English.
Use it when you need a schedule for jobs, backups, or batch tasks and want to confirm it runs at the right times.
All calculations happen locally in your browser, including the upcoming run preview.
Supported syntax
- 5 fields only (no seconds field)
*,*/n, ranges (a-b), and lists (a,b,c)- Day-of-week uses 0-6 (Sun=0)
Some cron dialects allow names (MON) or special chars (L, W, #). This tool does not.
FAQ
Does this support a seconds field?
No. It uses the common 5-field format: minute, hour, day of month, month, day of week.
Are times shown in my timezone?
Yes. The next-run preview uses your local time settings.