Build cron expressions visually. Preview upcoming execution times.
Visual cron expression generator for scheduling tasks.
A cron expression consists of 5 fields: minute, hour, day of month, month, day of week.
The * symbol means "every", */N means "every N units", a specific number is a fixed value.
Use quick presets for common schedules or configure each field manually.
The next 5 runs are calculated based on your browser's current time.
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Open AI chat →Cron Generator Online — Schedule Creation with Human-Readable Explanation
Cron is a task scheduler in Unix/Linux systems that executes commands on a schedule. Our generator creates cron expressions through a visual interface, explains them in human-readable language ("every Monday at 9:00"), and shows upcoming runs.
Cron Expression Syntax
| Field | Range | Examples |
|---|---|---|
| Minutes | 0–59 | 0, 30, */15 |
| Hours | 0–23 | 9, 0, */6 |
| Day of month | 1–31 | 1, 15 |
| Month | 1–12 or jan–dec | 1, 6, */3 |
| Day of week | 0–7 (0,7=Sun) or sun–sat | 1, mon, 1-5 |
Special Characters
| Symbol | Meaning | Example |
|---|---|---|
* | Any value | * * * * * — every minute |
, | List of values | 0 9,17 * * * — at 9:00 and 17:00 |
- | Range | 0 9 * * 1-5 — weekdays at 9:00 |
/ | Step | */15 * * * * — every 15 minutes |
Common Cron Expressions
| Expression | Description |
|---|---|
* * * * * | Every minute |
0 * * * * | Every hour |
0 9 * * 1-5 | Weekdays at 9:00 |
0 0 * * * | Every night at midnight |
0 0 1 * * | First day of every month |
Frequently Asked Questions
How to run a task every 30 seconds?
Standard cron doesn't support seconds. Solutions: two cron jobs offset by sleep, systemd timers (OnCalendar=*:*:0,30), or Kubernetes CronJob.
What do @reboot, @daily mean?@reboot — on system start, @daily = 0 0 * * *, @weekly = 0 0 * * 0, @monthly = 0 0 1 * *.
What timezone does cron use?
The server system timezone. For a different timezone, add TZ=Europe/Moscow to crontab.
For Unix timestamp work use the timestamp converter.
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