Cron Expression Generator は何をしますか？
Cron Expression Generator はブラウザ上で結果を生成するツールで、結果と制限を明確に示します。 検証済みの機能： Cron validation, Next five runs, IANA time zones, Plain-language summary.
Cron syntax is not fully portable
Use this parser for conventional five-field schedules. Before deployment, confirm how the target system combines day-of-month with day-of-week, handles time zones, and treats daylight-saving transitions.
使い方
- Enter a five-field expression directly or edit Minute, Hour, Day, Month, and Weekday separately.
- Choose the IANA time zone in which the schedule should be interpreted.
- Select Calculate and review the plain-language summary plus the next five runs.
実際の入出力例
Run at 09:00 on weekdays
入力
0 9 * * 1-5出力
at minute 0, at hour 9, on weekdays. Day-of-month: *; month: *.
Next runs: five instants in the selected time zoneThe page uses the Unix-style order minute, hour, day of month, month, and day of week.
一般的なエラーと対処
| 症状 | 原因 | 対処 |
|---|---|---|
| The expression is rejected even though another scheduler accepts it. | The other system may use six or seven fields, Quartz syntax, macros, or vendor extensions. | Translate the schedule to five fields and verify the target scheduler’s documented dialect. |
| A run shifts or occurs twice near a daylight-saving change. | Local clock times can be skipped or repeated when a zone changes offset. | Review the preview in the deployment time zone and prefer UTC for schedules that require uniform elapsed intervals. |
Important behavior of Cron Generator
このツール固有の制限： Cron implementations differ; verify field count, day matching, and time-zone policy in the target scheduler.
標準と実装の参考資料
- cron-parser official repository (opens in a new tab)Documents the parser used to validate expressions and calculate upcoming runs.
- IANA Time Zone Database (opens in a new tab)Publishes the civil-time rules represented by IANA zone names.
Cron Generator — FAQ
Does the Cron Generator upload my input?
No. Processing runs in the current browser tab, and the page does not send tool input to a KitLumi processing endpoint.
What input does the Cron Generator accept?
It accepts a Unix-style five-field cron expression. The workspace checks the input and reports malformed or unsupported values before it produces a result.
What does the Cron Generator produce?
It produces a short explanation and the next five scheduled instants. Copy and download controls appear when the output format supports them.
What limitation should I know?
Cron implementations differ; verify field count, day matching, and time-zone policy in the target scheduler.
更新内容
実質的な更新： Cron Generator: Added Cron validation, Next five runs, IANA time zones, Plain-language summary, responsive controls, explicit runtime disclosure, and task-specific examples and limitations.