YAML to JSON Converter

Convert YAML to JSON and back with full syntax validation

🔒 100% ブラウザ内🆓 ずっと無料⚡ サインアップ不要
注意: 下記のツールインターフェースは現時点で英語のみに対応しています。UI の翻訳は順次進めています。 このツールを英語で見る →

使い方

  1. 1
    Paste input

    Drop either YAML or JSON - the tool detects and converts either direction.

  2. 2
    Pick a direction

    Click YAML → JSON or JSON → YAML depending on what you want.

  3. 3
    Copy the result

    One click sends the converted output to your clipboard.

YAML to JSON Converter について

Free online YAML ↔ JSON converter. Paste YAML to get pretty-printed JSON, or paste JSON to get clean YAML. Full YAML 1.2 syntax support including anchors, tags, and multi-line strings. Runs entirely in your browser. 712 Tools の YAML to JSON Converter はモダンな JavaScript API を使って完全にブラウザ内で動作します - サーバーがあなたのデータを見ることは一切ありません。つまり、即時の結果、完全なプライバシー、アップロード制限なしです。

デバッグ、簡単な確認、あるいは本番のインシデント対応まで - このツールは何度でも無料で使えます。ウォーターマークなし、サインアップなし、ツール内広告なし。

よくある質問

Which YAML spec?

YAML 1.2 via js-yaml - the same parser Kubernetes tooling uses.

Does it preserve comments?

No. YAML comments are stripped on parse - this is a fundamental YAML → JSON limitation, not tool-specific.

What about YAML tags like !!str?

Standard tags are supported. Custom tags are not resolved and will error.

続きを読む

5 分で読了

.env files in 2026: parsing, secrets management, and portability

Every framework reads .env slightly differently. Here's the shared subset that works everywhere, the security pitfalls, and how to sync .env with JSON, YAML, and cloud secret stores.

5 分で読了

TOML vs YAML vs JSON: picking a config format in 2026

Rust picked TOML. Python packaging picked TOML. Cloudflare Workers picked TOML. Here's why the config landscape shifted, and how to move between TOML, YAML, and JSON without breakage.

5 分で読了

YAML pitfalls: the Norway problem, indentation, and anchors

YAML looks like the friendly config format until it silently converts 'NO' to false. Here are the traps in YAML 1.1, why 1.2 fixes some of them, and when to switch to JSON.

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