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free tools / cron generator

Cron every 15 minutes

Here is the line. Cron will run it, but it will not tell you the day it stops.

  1. Add one ping to the end of the job.
  2. Tell Uptimepage how often to expect it.
  3. A missed ping opens an incident and alerts you by Slack, email, PagerDuty, SMS or webhook.
alert me if this job stops

Free plan, no card. Opens the new-monitor form as a heartbeat check.

crontab -e
# .-------------- minute: 0, 15, 30, 45 # | .--------- hour: any value # | | .------- day of month: any value # | | | .----- month: any value # | | | | .--- day of week: any value */15 * * * * /path/to/command # Every 15 minutes. That is 96 runs a day.

# next runs · your local time

    # the same job, reporting in after each good run */15 * * * * /path/to/command && curl -fsS $URL # $URL is the ping URL of an Uptimepage heartbeat check

    Add the line with crontab -e. Cron reads the server's time zone, which is often UTC.

    same schedule elsewhere

    Kubernetes CronJob

    spec:
  schedule: "*/15 * * * *"

    GitHub Actions

    on:
  schedule:
    - cron: '*/15 * * * *'

    GitHub runs schedules in UTC unless you set a time zone, and can start them late when it is busy.

    what to know

    Four runs an hour, at :00, :15, :30 and :45. Written as a list, the same schedule is 0,15,30,45 * * * *.

    To keep it inside working hours, limit the hour and day fields: */15 9-17 * * 1-5 runs every 15 minutes from 09:00 to 17:45, Monday to Friday.

    For anything else, build it in the cron expression generator.

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