Cron Expression Generator
Create cron expressions with a visual builder.
0 9 * * 1-5A las 09:00, de Lunes a Viernes
Quick presets
Manual configuration
Syntax:
Cron expression generator: schedule automated tasks easily
Cron expressions are the standard for scheduling automated tasks on Unix/Linux systems, web servers, and cloud services. A cron expression consists of five space-separated fields: minute (0-59), hour (0-23), day of month (1-31), month (1-12), and day of week (0-6).
Cron expressions are widely used in web development and system administration: automatic database backups, periodic cleanup of temporary files, scheduled email sending, SSL certificate renewal, and data synchronization between services.
Our visual generator lets you build cron expressions without memorizing the syntax. Select a quick preset or configure each field manually, and you'll see the resulting expression along with a readable description of when the task will execute.
Frequently asked questions
What is a cron expression?
A cron expression is a text string that defines an execution schedule for automated tasks. It was created for the Unix cron program in the 1970s and remains the most widely used standard for scheduling tasks. The five fields represent: minute, hour, day of month, month, and day of week.
How do I test my cron expression?
You can test your expression directly on a Linux server by typing crontab -e to edit the user's crontab. In cloud services like AWS, Vercel, or GitHub Actions, you can configure the expression in the project's configuration file. Our tool shows a readable description so you can verify the schedule is correct before deploying it.
What is the difference between */5 and 5 in a cron field?
The value 5 means "exactly at minute/hour 5", meaning it runs once when the value matches 5. On the other hand, */5 means "every 5 units", meaning it runs at 0, 5, 10, 15, 20, etc. For example, */5 in the minutes field will run the task every 5 minutes, while 5 will only run it at minute 5 of each hour.
Want to learn more? Read our complete guide →