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Cron builder
Cron builder

Cron: every 15 minutes — */15 * * * *

Four runs an hour, at :00, :15, :30 and :45 — */15 expands to exactly those minutes. Like every step expression it is anchored to the clock face, so "every 15 minutes starting from 9:07" is not what you get.

If you do need an offset — say to dodge the :00 rush when every other job on the box fires — give the step a range: 7-59/15 runs at :07, :22, :37 and :52. Same cadence, empty lane. The builder below writes either form for you.

What this schedule does, field by field

FieldValueMeaning
Minute*/15minutes divisible by 15 (:00, :15, :30, :45)
Hour*every hour
Day of month*every day
Month*every month
Day of week*every weekday
POSIX / Vixie crontab — 5 fields, @macros supported
*/15Minute
*Hour
*Day
*Month
*Weekday
Every 15 minutes
Presetsclick to load — converted to the active dialect
Visual buildertwo-way synced with the expression above
Minute*/15
everyfrom
Hour*
Every value (*)
Day*
Every value (*)
Month*
Every value (*)
Weekday*
Every value (*)
Next 10 runsin
No upcoming runs — the schedule may be entirely in the past (e.g. a fixed year).
Field referenceStandard
#FieldAllowed valuesSpecial characters
1Minute0–59* , - /
2Hour0–23* , - /
3Day of month1–31* , - /
4Month1–12 or JAN–DEC* , - /
5Day of week0–7 or SUN–SAT (0 and 7 = Sunday)* , - /
Macrosstandard crontab shortcuts — click to use
Once an hour, at minute 0 (≡ 0 * * * *)
Once a day, at 00:00 (≡ 0 0 * * *)
Once a day, at 00:00 (≡ 0 0 * * *)
Once a week, Sunday at 00:00 (≡ 0 0 * * 0)
Once a month, on the 1st at 00:00 (≡ 0 0 1 * *)
Once a year, on 1 January at 00:00 (≡ 0 0 1 1 *)
Once a year, on 1 January at 00:00 (≡ 0 0 1 1 *)
Once, at system startup — has no schedule, so next runs cannot be computed
Everything is computed on your device — nothing is uploaded.