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Title: JSON - JavaScript | MDN

Open Graph Title: JSON - JavaScript | MDN

Description: JSON 名前空間オブジェクトは、 JavaScript Object Notation (JSON) を解釈したり、値を JSON に変換したりする静的メソッドを持ちます。

Open Graph Description: JSON 名前空間オブジェクトは、 JavaScript Object Notation (JSON) を解釈したり、値を JSON に変換したりする静的メソッドを持ちます。

Opengraph URL: https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON

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Skip to main contenthttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#content
Skip to searchhttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#search
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See all…https://developer.mozilla.org/ja/docs/Web/HTML/Reference
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See all…https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference
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標準組み込みオブジェクトhttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects
JSONhttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON
https://github.com/orgs/mdn/discussions/739
https://developer.mozilla.org/de/docs/Web/JavaScript/Reference/Global_Objects/JSON
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON
https://developer.mozilla.org/es/docs/Web/JavaScript/Reference/Global_Objects/JSON
https://developer.mozilla.org/fr/docs/Web/JavaScript/Reference/Global_Objects/JSON
https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON
https://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Global_Objects/JSON
https://developer.mozilla.org/pt-BR/docs/Web/JavaScript/Reference/Global_Objects/JSON
https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Global_Objects/JSON
https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/JSON
https://developer.mozilla.org/zh-TW/docs/Web/JavaScript/Reference/Global_Objects/JSON
コミュニティーについてもっと知り、仲間になるにはこちらから。https://developer.mozilla.org/ja/docs/MDN/Community/Contributing/Translated_content#アクティブなロケール
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON
Learn more https://developer.mozilla.org/ja/docs/Glossary/Baseline/Compatibility
See full compatibility https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#ブラウザーの互換性
Report feedback https://survey.alchemer.com/s3/7634825/MDN-baseline-feedback?page=%2Fja%2Fdocs%2FWeb%2FJavaScript%2FReference%2FGlobal_Objects%2FJSON&level=high
JavaScript Object Notationhttps://json.org/
JSONhttps://developer.mozilla.org/ja/docs/Glossary/JSON
解説https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#解説
静的プロパティhttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#静的プロパティ
静的メソッドhttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#静的メソッド
例https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#例
仕様書https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#仕様書
ブラウザーの互換性https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#ブラウザーの互換性
関連情報https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#関連情報
解説https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#解説
new 演算子https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Operators/new
Mathhttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Math
JavaScript と JSON の違いhttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#javascript_と_json_の違い
nullhttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Operators/null
オブジェクトと配列https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#オブジェクトと配列
末尾のカンマhttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Trailing_commas
数値https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#数値
JSON supersethttps://github.com/tc39/proposal-json-superset
SyntaxErrorhttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/SyntaxError
undefinedhttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/undefined
JSON5https://json5.org/
YAMLhttps://ja.wikipedia.org/wiki/YAML
オブジェクトリテラル構文と JSONhttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Operators/Object_initializer#オブジェクトリテラル表記法_vs_json
JSON の完全な構文https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#json_の完全な構文
ABNFhttps://ja.wikipedia.org/wiki/ABNF
IETF の JSON 標準 (RFC)https://datatracker.ietf.org/doc/html/rfc8259
ホワイトスペースhttps://developer.mozilla.org/ja/docs/Glossary/Whitespace
静的プロパティhttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#静的プロパティ
JSON[Symbol.toStringTag]https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#jsonsymbol.tostringtag
[Symbol.toStringTag]https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Symbol/toStringTag
Object.prototype.toString()https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Object/toString
静的メソッドhttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#静的メソッド
JSON.isRawJSON()https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/isRawJSON
JSON.rawJSON()https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/rawJSON
JSON.parse()https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse
JSON.rawJSON()https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/rawJSON
JSON.stringify()https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify
例https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#例
JSON の例https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#json_の例
JSON.parse()https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse
損失のない数値のシリアライズhttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#損失のない数値のシリアライズ
BigInthttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/BigInt
JSON.stringify()https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify
JSON.rawJSON()https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/rawJSON
JSON.parse()https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse
仕様書https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#仕様書
ECMAScript® 2026 Language Specification# sec-json-objecthttps://tc39.es/ecma262/multipage/structured-data.html#sec-json-object
ブラウザーの互換性https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#ブラウザーの互換性
関連情報https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON#関連情報
JSON Diffhttps://json-diff.com/
JSON Beautifier/editorhttps://jsonbeautifier.org/
JSON Parserhttps://jsonparser.org/
JSON Validatorhttps://tools.learningcontainer.com/json-validator/
Learn how to contributehttps://developer.mozilla.org/ja/docs/MDN/Community/Getting_started
MDN contributorshttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/contributors.txt
View this page on GitHubhttps://github.com/mdn/translated-content/blob/main/files/ja/web/javascript/reference/global_objects/json/index.md?plain=1
Report a problem with this contenthttps://github.com/mdn/translated-content/issues/new?template=page-report-ja.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fja%2Fdocs%2FWeb%2FJavaScript%2FReference%2FGlobal_Objects%2FJSON&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60ja%2Fweb%2Fjavascript%2Freference%2Fglobal_objects%2Fjson%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fja%2Fdocs%2FWeb%2FJavaScript%2FReference%2FGlobal_Objects%2FJSON%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Ftranslated-content%2Fblob%2Fmain%2Ffiles%2Fja%2Fweb%2Fjavascript%2Freference%2Fglobal_objects%2Fjson%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Ftranslated-content%2Fcommit%2F0c66999ab8252a8cb32c6d045375149816c8cd80%0A*+Document+last+modified%3A+2025-12-19T13%3A39%3A48.000Z%0A%0A%3C%2Fdetails%3E
標準組み込みオブジェクトhttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects
JSONhttps://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON
isRawJSON()https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/isRawJSON
parse()https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse
rawJSON()https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/rawJSON
stringify()https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify
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