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Cron式パーサー

Cron式を解析してわかりやすい日本語で説明します。スケジュール構文を即座に理解できます。

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Options

Field order:

┌─── minute (0-59)
│ ┌─── hour (0-23)
│ │ ┌─── day of month (1-31)
│ │ │ ┌─── month (1-12)
│ │ │ │ ┌─── day of week (0-6, Sun=0)
* * * * *

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Examples

Example 1
* * * * *
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Example 2
0 9 * * 1-5
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Example 3
30 6 1 * *
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Example 4
*/15 * * * *
Click "Example 4" above to load
Example 5
0 0 * * 0
Click "Example 5" above to load

Frequently Asked Questions

Q: What is a cron expression?

A: A string of 5 fields (minute, hour, day, month, weekday) that defines when a scheduled task runs.

Q: What does * mean?

A: * means "every" for that field — e.g., * in the minute field means every minute.

Q: What does */5 mean?

A: The slash notation means "every N units" — */5 in minutes means every 5 minutes.

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Privacy & Security

This tool runs entirely in your browser. No data is sent to our servers. We don't store, share, or have access to any of the information you process here.