What cron format does this expect?

The standard 5-field format: minute, hour, day of month, month, day of week.

Does this tool send my input anywhere?

No - parsing and building both run entirely in your browser.

Convert a cron expression to plain English, or build one from a friendly picker.

Cron expression

At 09:00 AM, only on Monday

Or build one

Frequency

Hour (24h)

Minute

Files never leave your device - everything runs entirely in your browser.

1
Paste a cron expression

See it explained in plain English instantly.
2
Or use the builder

Pick a frequency and time, then click "Use this" to fill in the expression.
3
Copy the result

Ready to paste into a crontab or scheduler config.

What cron format does this expect?: The standard 5-field format: minute, hour, day of month, month, day of week.
Does this tool send my input anywhere?: No - parsing and building both run entirely in your browser.