Cron Expression Explainer

Paste any cron expression and instantly see a plain-English explanation of when it runs — no memorizing cron syntax required.

What Does This Tool Do?

Cron expressions are used to schedule automated tasks on servers and in code. They look like "0 9 * * 1-5" which means "at 9am every weekday" — but reading them is not obvious without experience. This tool parses any cron expression and explains each field in plain English.

Key Features

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Plain English

Each field is explained in human-readable language.

📅

Preset Detection

Recognizes common schedules like "Daily at midnight" or "Every 5 minutes".

🔢

5 and 6 Field Support

Handles both standard 5-field and extended 6-field cron expressions.

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Live Updates

Explanation updates as you type.

How to Use This Tool

Type or paste your cron expression (e.g. "0 9 * * 1-5").
The explanation appears instantly below.
Use it to verify your cron schedule is what you intended.

How It Works

The expression is split into 5 or 6 space-separated fields. Each field is analyzed for wildcards (*), ranges (1-5), step values (*/5), and specific values. A human-readable description is generated for each field.

Common Use Cases

💡 DevOps & Server Administration

Verify cron jobs before deploying to understand their actual schedule.

💡 Learning Cron Syntax

Understand what different cron patterns mean as you learn to write them.

💡 Code Review

Quickly understand cron expressions in configuration files or CI/CD pipelines.

Frequently Asked Questions

What is a cron expression?

Cron is a Unix scheduling system. Expressions define when tasks run using 5 fields: minute, hour, day-of-month, month, and day-of-week. * means any value, */5 means every 5 units.

What is the 6-field format?

Some systems add a seconds field before the standard 5 fields, producing a 6-field expression. The tool auto-detects this.

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