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JSON 検証

JSON を検証

ブラウザで動作 · アップロード不要

このツールとページ内の説明は、現在は英語のみです。動作は同じで、すべてブラウザ内で実行されます。

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  • サーバーによるサイズ制限なし
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  • 無料

How to validate JSON

  1. Paste your JSON.
  2. Press Validate JSON.
  3. If there is an error, its line and column are shown and the problem is selected in the text box. Fix it and validate again.

Common JSON errors

  • A comma after the last item in an object or array.
  • Single quotes instead of double quotes around strings and keys.
  • Keys without quotes.
  • Comments, which standard JSON does not allow.
  • Special values such as NaN, Infinity or undefined.

Is my JSON sent anywhere?

No. Validation happens in your browser.

よくある質問

Which JSON standard is used?

Standard JSON as defined in RFC 8259, the same rules web browsers use.

Is my JSON uploaded?

No. Everything stays in your browser.