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Cron Expression Generator— Free & Private

Build and decode cron expressions with a visual editor and human-readable descriptions.

Processed in your browser. Nothing uploaded.
0 * * * *
at minute 0
* = any value
5 = specific value
1-5 = range
*/5 = every 5
1,3,5 = list

What Is a Cron Expression Generator?

A cron expression generator helps you build and understand cron schedule syntax used by Unix cron, Kubernetes CronJobs, GitHub Actions, AWS CloudWatch, and other schedulers. Instead of memorizing the five- or six-field cron format, you can visually select the schedule you want and get a valid cron expression instantly. Our tool runs entirely in your browser with no data sent to any server.

How to Use Cron Expression Generator

  1. Set your schedule

    Use the visual controls to specify minute, hour, day, month, and weekday values.

  2. Preview upcoming runs

    See the next scheduled execution times to verify the expression matches your intent.

  3. Copy the cron expression

    Copy the generated cron expression for use in your crontab, CI/CD config, or scheduler.

Why Use Our Cron Expression Generator?

Visual builder — no need to memorize cron syntax
Shows the next 5-10 execution times for verification
Supports standard 5-field and extended 6-field cron formats
Human-readable description of what the expression means
Runs entirely in your browser — no data transmitted
Useful for crontab, Kubernetes, GitHub Actions, and AWS schedulers
No account or installation required

Frequently Asked Questions

What is the format of a cron expression?

A standard cron expression has five fields: minute (0-59), hour (0-23), day of month (1-31), month (1-12), and day of week (0-6). Each field can contain specific values, ranges, lists, or wildcards. Some systems add a sixth field for seconds.

Can I test when my cron job will next run?

Yes. The generator displays the next several execution times based on your expression so you can verify it matches your intended schedule before deploying it.

What does the asterisk (*) mean in a cron expression?

An asterisk means "every possible value" for that field. For example, * in the hour field means every hour. You can combine wildcards with step values like */5 in the minute field to mean every 5 minutes.