YAML Formatter and Validator は何をしますか？
YAML Formatter and Validator はブラウザ上でデータを整形・検証するツールで、結果と制限を明確に示します。 検証済みの機能： YAML validation, YAML formatting, YAML to JSON, Expandable tree view.
Choose the view that matches the review task
Use formatted YAML for configuration editing, JSON for systems that require strict JSON, and Tree view to inspect deep values without scanning indentation.
使い方
- Paste one YAML document or load the included example.
- Choose formatted YAML, JSON, or Tree view.
- Run the parser and inspect, copy, or download the normalized result.
実際の入出力例
Normalize a short YAML mapping
入力
project: KitLumi
tools:
- json
- yaml出力
project: KitLumi
tools:
- json
- yamlThe YAML is parsed as data before it is emitted or displayed as a tree.
一般的なエラーと対処
| 症状 | 原因 | 対処 |
|---|---|---|
| A bad indentation error appears. | Nested YAML levels are not aligned consistently. | Use spaces, align siblings, and avoid tab indentation. |
| Comments disappear after formatting. | The formatter normalizes parsed data rather than editing the original concrete syntax tree. | Keep a source-controlled original when comments and anchor style must be preserved. |
Important behavior of YAML Formatter
このツール固有の制限： Formatting through a data model does not preserve comments, anchors, aliases, or the exact original scalar style.
標準と実装の参考資料
- YAML 1.2.2 specification (opens in a new tab)Defines YAML syntax and representation models.
- js-yaml documentation (opens in a new tab)Documents the local parser and dumper used by the tool.
YAML Formatter — FAQ
Does the YAML Formatter 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 YAML Formatter accept?
It accepts one YAML document. The workspace checks the input and reports malformed or unsupported values before it produces a result.
What does the YAML Formatter produce?
It produces formatted YAML, two-space JSON, or a structured tree. Copy and download controls appear when the output format supports them.
What limitation should I know?
Formatting through a data model does not preserve comments, anchors, aliases, or the exact original scalar style.
更新内容
実質的な更新： YAML Formatter: Added YAML validation, YAML formatting, YAML to JSON, Expandable tree view, responsive controls, explicit runtime disclosure, and task-specific examples and limitations.