Cron Expression Explainer - Translate Crontab Rules to Plain English
Demystify complex crontab scheduling expressions. Translate cryptic cron strings (including five and six-field configurations) into clear, natural human language. Perfect for system administrators, DevOps, and developers automating background tasks, batch scripts, or scheduled server events.
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How to use Cron Expression explainer Online
Step 1: Type or paste your target crontab cron expression into our parser input.
Step 2: Read the dynamically compiled, highly readable English explanation of your schedule.
Step 3: Adjust cron variables directly in the selector to compile custom schedules.
Frequently Asked Questions
What are the standard 5 fields in a Unix cron expression?
A standard Unix cron expression consists of 5 whitespace-separated fields: Minute (0-59), Hour (0-23), Day of Month (1-31), Month (1-12 or JAN-DEC), and Day of Week (0-6 or SUN-SAT). Some modern scheduling engines also support a 6th field representing seconds or years.
What do special characters like asterisks, commas, and slashes mean in a cron string?
Asterisk (`*`) means 'every' interval (e.g., every minute). Comma (`,`) creates a list of values (e.g., 1,5,10). Hyphen (`-`) specifies a range (e.g., 1-5). Slash (`/`) indicates step increments (e.g., `*/15` means every 15 minutes).
How does the 'Day of Month' and 'Day of Week' relationship function?
By default in standard cron, if both the Day of Month and Day of Week are specified, they behave as an OR condition. The task will execute if either condition is met. To enforce more complex schedule logical combinations, check your target daemon's parser instructions.