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SmaftyTools

Cron Expression Generator

Build and understand cron expressions with instant plain-English descriptions and common presets. Free cron schedule generator.

0–59
0–23
1–31
1–12
0–6, Sun=0

Supports *, numbers, ranges (1-5), lists (1,15) and steps (*/10).

Expression

0 9 * * 1-5

At 09:00, on Monday through Friday.

About Cron Expression Generator

The Cron Expression Generator builds standard 5-field cron schedules and explains them in plain English as you type. Set the minute, hour, day, month and weekday fields directly — with support for ranges, lists and steps — or start from a preset like 'weekdays at 6 PM'.

Every change is validated against each field's allowed range and instantly described (e.g. '0 9 * * 1-5' → 'At 09:00, on Monday through Friday'), so you catch mistakes before they hit your crontab, CI pipeline or scheduler.

Works for classic Unix cron, Kubernetes CronJobs, GitHub Actions schedules and most job runners that use the 5-field format.

How to Use the Cron Expression Generator

  1. Edit the five fields, or pick a preset to start from.
  2. Read the plain-English description to confirm the schedule is what you meant.
  3. Copy the expression into your crontab, workflow file or scheduler.

Features

  • Live validation of every field's range
  • Plain-English description of the schedule
  • Ranges (1-5), lists (1,15) and steps (*/10) supported
  • Nine common presets to start from

Frequently Asked Questions

What do the five fields mean?

In order: minute (0–59), hour (0–23), day of month (1–31), month (1–12) and day of week (0–6, Sunday = 0). An asterisk means 'every'.

How do I run a job every 15 minutes?

Use a step value in the minute field: */15 * * * *. Steps work in any field — */2 in the hour field means every two hours.

Is the Cron Expression Generator free?

Yes, the Cron Expression Generator is completely free with no usage limits. No signup, no account and no installation required.

Does the Cron Expression Generator work on mobile?

Yes. The Cron Expression Generator is fully responsive and works in any modern browser on phones, tablets and desktops.

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