Cron表達式建構器

如何使用本工具

1. 1

   Type a value into each of the five fields: Minute, Hour, Day (of month), Month, and DOW (day of week).

2. 2

   Use cron syntax inside any field: * for every value, a number like 9, a range like 1-5, a step like */15, or a list like 1,15.

3. 3

   Or click a preset such as 'Weekdays at 8am' to fill all five fields at once, then tweak as needed.

4. 4

   Read the assembled expression in the preview box and press Copy to put it on your clipboard for crontab or your scheduler.

什麼是Cron表達式建構器？

常見使用場景

• Schedule a nightly database backup to run at a quiet hour, for example 0 3 * * * for 3am every day.

• Configure a GitHub Actions or GitLab CI workflow that runs on a cron trigger without hand-counting the fields.

• Set up a Kubernetes CronJob or a serverless scheduled function and paste the expression into the schedule field.

• Build a weekday-only reminder or report job, like 0 8 * * 1-5 for 8am Monday through Friday.

• Create a high-frequency polling task such as */5 * * * * to check a queue or endpoint every five minutes.

• Generate a monthly billing or cleanup expression like 0 0 1 * * that fires at midnight on the first of each month.

常見問題