{ } JSON Formatter

Pretty-print, minify, and validate JSON with stats

🔒 画像がデバイスの外に出ることはありません。 すべての処理はJSON.parse + JSON.stringifyを使用してブラウザ内でローカルに行われます。アップロード、サーバー、追跡は一切ありません。

特長

  • Pretty Print — Format JSON with proper indentation and syntax highlighting for easy reading.
  • 最小化 — 圧縮 JSON by removing all whitespace — ideal for APIs and config files.
  • Validate — Check if your JSON is valid and see clear error messages for syntax issues.
  • Statistics — See key count, nesting depth, and data size at a glance.

仕組み

  1. Paste your JSON — Enter or paste JSON data in the input area.
  2. Format or minify — Click Format for pretty-print or 最小化 for compact output.
  3. Copy the result — Copy the formatted output to your clipboard.

活用例

  • Pretty-print API responses for debugging
  • 最小化 JSON config files for production
  • Validate JSON before sending to APIs

よくある質問

What indentation is used?

Pretty-print uses 2-space indentation, which is the most common standard for JSON formatting.

Can it handle large JSON files?

Yes. The browser's native JSON parser is very efficient. Files up to several MB are handled smoothly.

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