YAML → JSON
YAML 設定を JSON に
YAML入力
JSON出力
Turn YAML config into JSON your code can parse
Even if you write config in YAML, lots of tools — APIs, JavaScript runtimes, schema validators — only speak JSON. Converting YAML to JSON resolves anchors, expands aliases, and produces a clean object you can feed into validation libraries, request bodies, or app state.
Use the converter when you need to
Validate a YAML manifest with JSON Schema
Most schema validators accept JSON only — convert YAML to JSON first, then run validation.
Send a YAML config as an API request body
Many APIs accept JSON only. Convert your YAML payload before posting it.
Inspect a YAML file as structured data
Convert to JSON, then explore the structure in a viewer or feed it into JSONPath queries.
How to convert YAML to JSON quickly
- 1
Paste the YAML content into the editor.
- 2
Click Convert to produce JSON with anchors and aliases resolved.
- 3
Copy the JSON or feed it into a downstream tool.
Keep going
Convert JSON back to YAML
Round-trip the document when you need to write a YAML manifest or workflow file.
Validate the converted JSON
Catch any structural issues before the JSON hits an API or schema check.
Validate against a schema
Move from syntax to contract validation once the YAML is in JSON form.
Explore the result
Browse the converted JSON in tree view to confirm the structure looks right.
Common YAML-to-JSON workflows
Run schema and policy checks that only accept JSON without rewriting the YAML by hand.
Convert .github/workflows YAML to JSON to query the structure programmatically.
Convert YAML configs to JSON so you can compare them with structural diff tools.
関連ツール
よくある質問
YAMLを貼り付けて「Convert」をクリックします。アンカー、エイリアス、複数行文字列などのYAML構文を解析し、正しく整形されたJSONを出力します。
多くのAPIはJSONしか受け付けません。Kubernetesマニフェスト、Docker Compose、CI/CD設定などYAMLで持っているデータをプログラムで扱いたい場合、JSONに変換するとどの言語でも処理しやすくなります。
はい。変換時にアンカー（&）とエイリアス（*）は解決されるため、JSON出力には参照ではなく展開済みの完全なデータが入ります。
このツールは入力内の最初のYAMLドキュメントを処理します。--- で区切られた複数ドキュメントがある場合は、1つずつ貼り付けて変換してください。