JSON to YAML Converter

How to Use the JSON to YAML Converter

This free online JSON to YAML converter allows you to transform data between JSON (JavaScript Object Notation) and YAML (YAML Ain't Markup Language) formats instantly in your browser. No data is sent to any server -- all conversion happens client-side for maximum privacy and speed.

What is JSON?

JSON is a lightweight data-interchange format that is easy for humans to read and write, and easy for machines to parse and generate. It is based on a subset of JavaScript and is widely used for APIs, configuration files, and data storage. JSON supports strings, numbers, booleans, null, arrays, and objects as its core data types.

What is YAML?

YAML is a human-friendly data serialization language commonly used for configuration files and data exchange between languages with different data structures. YAML uses indentation to denote structure, making it more readable than JSON for complex nested data. It is popular in DevOps tools such as Docker Compose, Kubernetes, Ansible, and GitHub Actions.

Why Convert Between JSON and YAML?

Developers frequently need to convert between JSON and YAML when working with different tools and platforms. For example, you might receive API responses in JSON but need to write configuration in YAML, or vice versa. This converter handles nested objects, arrays, strings with special characters, numbers, booleans, and null values accurately. It preserves data types during conversion and produces clean, properly indented output. The bidirectional nature of this tool means you can paste JSON on the left and get YAML on the right, or paste YAML on the right and get formatted JSON on the left. Both formats are widely supported across programming languages and frameworks, making this converter an essential tool in any developer's toolkit.

Features

• Bidirectional conversion: JSON to YAML and YAML to JSON
• No external dependencies -- pure JavaScript implementation
• Handles nested objects, arrays, and all JSON data types
• Proper YAML indentation and formatting
• Copy-to-clipboard functionality for quick use
• Client-side only -- your data never leaves your browser

JSON to YAML コンバーターの使い方

この無料オンラインツールは、JSON形式とYAML形式のデータを即座に相互変換します。 全ての変換処理はブラウザ上で行われ、サーバーへのデータ送信は一切ありません。

JSONとは

JSONはJavaScriptオブジェクト記法に基づく軽量なデータ交換フォーマットです。 API、設定ファイル、データ保存に広く使われています。文字列、数値、真偽値、null、配列、 オブジェクトをサポートしています。

YAMLとは

YAMLは人間が読みやすいデータシリアライズ言語で、設定ファイルに多用されます。 Docker Compose、Kubernetes、Ansible、GitHub Actionsなどで利用されています。 インデントで構造を表現するため、JSONより視認性が高いのが特徴です。