Cron Expression Parser

Enter a standard or 6-field cron expression and get an explanation of when it runs, plus the next 10 real trigger dates/times.

Cron expression

Expression5 fields (standard)

`min`0-59	`hour`0-23	`dom`1-31	`mon`1-12	`dow`0-7	`sec`0-59
Minuto	Hora	Día del mes	Mes	Día de la semana (0=domingo)	Segundo (opcional)

Examples

Number of runs to show

Upcoming runs (relative to now)

en el minuto cada 5 (de *), de cada hora, todos los días

#1vie, 23/10/2026, 15:10:002 min

#2vie, 23/10/2026, 15:15:007 min

#3vie, 23/10/2026, 15:20:0012 min

#4vie, 23/10/2026, 15:25:0017 min

#5vie, 23/10/2026, 15:30:0022 min

#6vie, 23/10/2026, 15:35:0027 min

#7vie, 23/10/2026, 15:40:0032 min

#8vie, 23/10/2026, 15:45:0037 min

How to use: Cron

1Type the cron expression (5 fields, or 6 with seconds) or pick an example.
2Choose how many runs you want to see.
3Read the next run dates and copy them.

What is it for?

Check when a scheduled job will run.
Review crons on servers, CI or serverless functions.
Catch scheduling mistakes before deploying.

Reading and writing cron expressions

The five 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 (0-6 or 0-7 depending on the system, where Sunday is 0). "30 8 * * 1-5" means 8:30 on weekdays. The asterisk means "any value".

Operators

A comma lists values (1,15), a hyphen sets ranges (9-17) and a slash defines steps: */15 in minutes is 0, 15, 30 and 45. Combining steps with ranges, such as 0-30/10, is also valid. Some systems add a sixth seconds field or shortcuts such as @daily; check the documentation of the one you use.

Common traps

If you fill in both day of month and day of week, most implementations run the job when either matches, not both. Cron also uses the server's time zone: a job at 2:30 may be skipped or run twice during a daylight saving change, so schedule critical jobs in UTC.

Check before you deploy

This tool translates the expression into plain language and calculates the next run times, so you can confirm that "every 5 minutes" is not actually "at minute 5 of every hour" before it reaches production.

September 25, 2026

Cron cheat sheet: syntax and 20 ready-to-copy examples

Frequently asked questions

Which formats does it accept?+

Standard 5-field format (minute, hour, day, month, weekday) and the extended 6-field format with seconds.

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