Cron Expression Generator

Generate a cron expression by combining minute, hour, day, month, and weekday values.

Category: Dev Tools

When to use?

Use it to set the run cadence of server batch jobs, scheduled notifications, or automation scripts as a cron expression — no need to memorize cron syntax.

How to use

  • Set each field: minute, hour, day, month, weekday.
  • Check the generated cron expression.
  • Copy it for your server config.

Input Explanation

Each field supports a specific value, range (1-5), step (*/5), list (1,3,5), or wildcard (*).

Calculation Basis

It builds a space-separated 5-field string dynamically from the UI form values (minute, hour, day, month, weekday).

Usage Examples

  • Write batch schedules - Make repeat rules like weekdays at 9 AM as a cron expression.
  • Quick pre-deploy check - Check inputs and output to reduce errors before dev/ops work.
  • Aid docs/reviews - Copy the result into dev docs, issues, or review comments.

Examples

  • Every day at 9 AM: 0 9 * * *
  • Weekdays at 9 AM: 0 9 * * 1-5
  • Every 5 minutes: */5 * * * *

Cautions

  • Generated output is for reference; test carefully before production use.
  • Specific schedulers may use different cron dialects, so verify compatibility.

Guides

5-field cron structure

A common cron expression is minute, hour, day, month, weekday. For example, every day at 9 AM is 0 9 * * *.

Check the next run

After building an expression, verify the actual run times with the Cron Next Run calculator to reduce operational mistakes.

FAQ

Is it the 5-field cron format?

Yes, it generates a standard 5-field cron expression (minute hour day month weekday).

How do I specify the weekday?

Use 0–6 or SUN–SAT, and ranges like 1-5 to pick weekdays.

Can I make a per-second schedule?

Standard 5-field cron is minute-level; for seconds, use a scheduler supporting 6 fields.

Where do I use the generated cron?

Paste it where 5-field cron is supported — Linux crontab, CI schedules, cloud schedulers.

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