Cron Expression Explainer
Developer
Paste any standard 5-field cron expression and see a plain-language description of when it runs, plus a field-by-field breakdown. Quick example chips load common schedules (every minute, weekdays at 9, every 15 minutes, etc.) so you can build by analogy. Localized output for English, Korean, Japanese, Spanish, Portuguese, and Chinese.
Description
At 09:00, Monday through Friday
Fields
Examples
How to use
- Type or paste a cron expression like '0 9 * * 1-5'.
- Read the plain-language description below.
- Inspect each of the 5 fields (minute, hour, day, month, weekday).
- Click an example chip to load a common pattern.
Frequently asked questions
- Which cron syntax is supported?
- Standard 5-field POSIX cron (minute hour day month weekday) plus ranges (1-5), steps (*/15), and lists (1,3,5). Quartz-style 6/7 field cron (with seconds) is not supported.
- What about @hourly, @daily, @reboot?
- Named shortcuts aren't supported — use the equivalent 5-field expression (e.g., @daily → '0 0 * * *').
- Is the time zone considered?
- Cron expressions themselves don't carry timezone info. The description is timezone-agnostic — whether '0 9 * * *' means 09:00 UTC, KST, or local depends on the system that runs it.
- Does the language follow my site language?
- Yes. Descriptions are rendered in the current page locale (en/ko/ja/es/pt/zh).
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