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Title: JSON.stringify() - JavaScript | MDN

Open Graph Title: JSON.stringify() - JavaScript | MDN

Description: JSON.stringify() メソッドは、ある JavaScript のオブジェクトや値を JSON 文字列に変換します。置き換え関数を指定して値を置き換えたり、置き換え配列を指定して指定されたプロパティのみを含むようにしたりすることもできます。

Open Graph Description: JSON.stringify() メソッドは、ある JavaScript のオブジェクトや値を JSON 文字列に変換します。置き換え関数を指定して値を置き換えたり、置き換え配列を指定して指定されたプロパティのみを含むようにしたりすることもできます。

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

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JSON	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON
stringify()	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify
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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/stringify
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/stringify#ブラウザーの互換性
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試してみましょう	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#試してみましょう
構文	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#構文
解説	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#解説
例	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#例
仕様書	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#仕様書
ブラウザーの互換性	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#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/stringify#関連情報
試してみましょう	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#試してみましょう
構文	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#構文
引数	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#引数
value	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#value
replacer 省略可	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#replacer
Symbol	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Symbol
null	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Operators/null
space 省略可	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#space
null	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Operators/null
返値	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#返値
例外	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#例外
TypeError	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/TypeError
長整数	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/BigInt
解説	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#解説
Boolean	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Boolean
Number	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Number
String	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/String
Object()	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Object/Object
BigInt	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/BigInt
Object()	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Object/Object
Symbol	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Symbol
BigInt	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/BigInt
undefined	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/undefined
Function	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Function
Symbol	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Symbol
null	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Operators/null
Infinity	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Infinity
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Symbol	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Symbol
replacer	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#replacer_引数
toJSON()	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#tojson_%E3%81%AE%E6%8C%99%E5%8B%95
replacer	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#replacer_引数
Temporal	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Temporal
Date	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Date
toISOString()	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Date/toISOString
列挙可能なプロパティ	https://developer.mozilla.org/ja/docs/Web/JavaScript/Guide/Enumerability_and_ownership_of_properties
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WeakMap	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/WeakMap
WeakSet	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/WeakSet
replacer	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#replacer_引数
Object.keys()	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Object/keys
replacer 引数	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#replacer_引数
Function	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Function
Symbol	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Symbol
undefined	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/undefined
reviver	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse#reviver_%E5%BC%95%E6%95%B0%E3%81%AE%E4%BD%BF%E7%94%A8
space 引数	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#space_引数
例	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#例
JSON.stringify の使用	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#json.stringify_の使用
リプレイサーとして関数を用いる例	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#リプレイサーとして関数を用いる例
リプレイサーとして配列を使用	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#リプレイサーとして配列を使用
引数 space の使用	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#引数_space_の使用
toJSON() の挙動	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#tojson_の挙動
循環参照をシリアライズした場合の JSON.stringify() に関する問題	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#循環参照をシリアライズした場合の_json.stringify_に関する問題
JSON 形式	https://www.json.org/
IETF 草稿	https://tools.ietf.org/html/draft-pbryan-zyp-json-ref-03
TypeError	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/TypeError
cycle.js	https://github.com/douglascrockford/JSON-js/blob/master/cycle.js
structuredClone()	https://developer.mozilla.org/ja/docs/Web/API/Window/structuredClone
v8.serialize()	https://nodejs.org/api/v8.html#v8serializevalue
localStorage で JSON.stringify() を使った例	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#localstorage_で_json.stringify_を使った例
Well-formed JSON.stringify()	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#well-formed_json.stringify
well-formed JSON.stringify 仕様	https://github.com/tc39/proposal-well-formed-stringify
仕様書	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#仕様書
ECMAScript® 2026 Language Specification# sec-json.stringify	https://tc39.es/ecma262/multipage/structured-data.html#sec-json.stringify
ブラウザーの互換性	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#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/stringify#関連情報
現在の JSON.stringify の挙動 (シンボルおよび well-formed unicode) のポリフィル (core-js)	https://github.com/zloirock/core-js#ecmascript-json
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
Learn how to contribute	https://developer.mozilla.org/ja/docs/MDN/Community/Getting_started
MDN contributors	https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify/contributors.txt
View this page on GitHub	https://github.com/mdn/translated-content/blob/main/files/ja/web/javascript/reference/global_objects/json/stringify/index.md?plain=1
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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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