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JSON Formatter

Pretty-print JSON with consistent two-space indentation, right in your browser. Useful for inspecting API responses, log payloads, or untangling minified JSON before committing it to a fixture.

ツール要約

このツールは構造化された入力を受け取り、サーバーへアップロードせずにブラウザで決定的な出力を返します。

ツール名
JSON Formatter
入力の目的
変換・検証・分析するソースコンテンツを入力してください。
出力の目的
コピー・再利用・デバッグに適した正規化された出力を受け取ります。
入力例
{"name":"Alice","tags":["admin","ops"]}
出力例
{ "name": "Alice", "tags": [ "admin", "ops" ] }

Formatted JSON will appear here after you click Format.

ツールの紹介

Pretty-print JSON with consistent two-space indentation, right in your browser. Useful for inspecting API responses, log payloads, or untangling minified JSON before committing it to a fixture.

ツール概要

JSON (JavaScript Object Notation) is a lightweight data format used by most web APIs. Minified JSON saves bytes on the wire but is hard to read by humans. The JSON Formatter parses your input with a strict JSON parser and re-emits it with two-space indentation and one key per line, so the structure becomes scannable. Nothing leaves your browser — formatting happens entirely on the client.

ユースケース

  • Use JSON Formatter when you need fast format and beautify json with proper indentation.
  • Handle developer workflows directly in the browser with no install required.
  • Support SEO long-tail intent by covering quick checks, troubleshooting, and one-off conversions.

入力／出力の例

入力の目的
{"name":"Alice","tags":["admin","ops"]}
出力の目的
{
  "name": "Alice",
  "tags": [
    "admin",
    "ops"
  ]
}

よくある質問

Is my JSON sent to a server?+
No. Formatting runs entirely in your browser using the built-in JSON parser.
Why does it say "Invalid JSON"?+
Your input could not be parsed by the strict JSON spec. Common causes: trailing commas, single quotes instead of double, comments, or missing closing brackets.
Can I change the indentation level?+
Not yet. The output uses two spaces per level, which matches the most common style guides.

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