Monu Tools

Cron Expression Generator

Build and check cron expressions. Pick a preset or edit the five fields, and see the next run times in your time zone. Runs entirely in your browser.

Cómo usar Cron Generator

  1. 01

    Pick a preset or type a cron expression in the five fields.

  2. 02

    See each field labelled and validated as you edit.

  3. 03

    Read the next run times, calculated in your local time zone.

Preguntas frecuentes

What do the five fields mean?

In order: minute, hour, day of month, month and day of week. An asterisk means every value, so * * * * * runs every minute.

How do I run a job every 15 minutes?

Use a step value in the minute field: */15 * * * * runs at minute 0, 15, 30 and 45 of every hour.

What does the day-of-week field accept?

Numbers 0 to 6 (Sunday is 0, and 7 also means Sunday) or three-letter names like MON. You can use ranges (MON-FRI) and lists (MON,WED,FRI).

Why does it match more days than I expect?

When both day-of-month and day-of-week are set, standard cron runs on either match, not both. Leave one as * to avoid surprises.

Does it support seconds or non-standard syntax?

This generator targets standard five-field cron. Some platforms add a seconds field or extensions like @reboot, which are not produced here.

Which time zone are the runs in?

The preview shows the next runs in your browser's local time zone. The server that executes the job uses its own zone, so confirm that matches.

Acerca de esta herramienta

A cron expression is a string of five (or six) fields that define when a scheduled task runs: minute, hour, day of month, month and day of week. The syntax is compact but easy to get wrong, and a misplaced asterisk can mean a job runs every minute instead of once a day.

This generator lets you pick from common presets (every hour, every day at midnight, every Monday at 9 AM) or build a custom expression field by field. It shows the next five run times in your local time zone so you can verify the schedule before deploying it. The output works with standard cron on Linux and macOS, crontab, AWS EventBridge, GitHub Actions schedules and most job-scheduling libraries.

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