Cron Parser – Free Cron Expression Generator & Checker

Parse cron expressions and see human-readable descriptions. View next N execution times. Built-in examples. Pure JS, no dependencies.

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Features

⏰

Human-Readable

Converts cron expressions to plain English descriptions instantly.

📅

Next Executions

Shows the next 5 or 10 scheduled run times based on current time.

📋

Built-in Examples

Click to load common cron expression examples for reference.

🔢

5 & 6 Field Support

Standard 5-field cron plus optional seconds field (6-field) support.

🔒

Privacy First

Pure JavaScript implementation. No data sent anywhere.

✅

Syntax Validation

Validates your cron expression and shows errors for invalid fields.

How to Use

1

Enter Expression

Type a cron expression like '0 9 * * *' or select an example.

2

View Description

The human-readable description appears instantly.

3

Check Next Runs

View the next scheduled execution times.

4

Copy

Copy the expression or description as needed.

Frequently Asked Questions

What is a cron expression?
A cron expression is a string of 5-6 fields separated by spaces that defines a schedule: [seconds] minute hour day month weekday. For example, '0 9 * * 1-5' means 9:00 AM on weekdays.
What cron formats are supported?
Standard 5-field (minute hour day month weekday) and extended 6-field (with seconds prefix). Both are parsed correctly.
What do the special characters mean?
* = any value, , = list (1,3,5), - = range (1-5), / = step (*/5 = every 5 units). Special strings: @yearly, @monthly, @weekly, @daily, @hourly.
Is my expression sent to a server?
No. The cron parser is implemented entirely in JavaScript running in your browser. Your expressions never leave your device.

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