Cron Expression Builder
Build, validate, and understand cron schedule expressions visually.
Minute(0–59)
Hour(0–23)
Day of Month(1–31)
Month(1–12)
Day of Week(0–6)
* * * * *
Every minute
Next 5 Run Times
- 1. 6/2/2026, 1:40:00 PM
- 2. 6/2/2026, 1:41:00 PM
- 3. 6/2/2026, 1:42:00 PM
- 4. 6/2/2026, 1:43:00 PM
- 5. 6/2/2026, 1:44:00 PM
How it works
Use the visual interface to select minute, hour, day, month, and weekday fields. The cron expression is generated in real time, with a human-readable description (e.g. 'Every day at 9:00 AM') shown below. Copy the expression for use in crontab, AWS EventBridge, or GitHub Actions.
Why use this tool?
Cron syntax is notoriously difficult to memorize. This free cron expression builder helps DevOps engineers, system administrators, and developers schedule tasks correctly without referencing documentation every time.
Frequently Asked Questions
What is a cron expression?
A cron expression is a string of 5 fields (minute, hour, day-of-month, month, day-of-week) that defines when a scheduled task runs. '0 9 * * 1–5' means 'at 9:00 AM every weekday'.
What does * mean in a cron expression?
An asterisk means 'every' for that field. '* * * * *' runs every minute. '0 * * * *' runs at the start of every hour. '0 0 * * *' runs at midnight every day.
Can I use this for GitHub Actions or AWS EventBridge?
Yes. Both use cron syntax for scheduling. Note that AWS EventBridge uses 6 fields (adds seconds or year), while standard Unix cron uses 5. Copy the expression and paste it directly into your config.
Is this free?
Yes, completely free. Build and validate cron expressions visually with a human-readable description.
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