Case Converter

テキストの大文字小文字を変換。
結果

8 Case Types

UPPER, lower, Title, Sentence, camelCase, PascalCase, snake_case, kebab-case.

Real-time

Convert as you type — no button needed.

Copy Result

One-click copy to clipboard.

Client-side

All processing in your browser. No data uploaded.

Case Converterについて

Text case conversion is a frequent task for developers, copywriters, and data professionals. Different contexts demand different casing styles: programming languages use camelCase, PascalCase, snake_case, or kebab-case for identifiers; editorial content requires Title Case or Sentence case; and data cleaning often needs bulk uppercase or lowercase conversion. This Case Converter tool supports eight distinct transformations in one place. UPPER CASE turns every letter into capitals — useful for headings or constants. lower case does the opposite. Title Case capitalises the first letter of every word. Sentence case capitalises only the first word of each sentence. camelCase joins words with no separator, capitalising each word after the first — the standard in JavaScript. PascalCase does the same but capitalises the first word too — common in class names. snake_case uses underscores and is the convention in Python and databases. kebab-case uses hyphens and is standard in CSS and URLs. Conversion happens as you type so you can preview the result instantly.

Case Converterの使い方

  1. Type or paste your text into the input field.
  2. Click one of the eight case buttons to select the conversion format.
  3. The converted text appears immediately in the output field below.
  4. Click a different case button at any time to switch formats without re-typing.
  5. Click "Copy" to copy the converted text to your clipboard.

よくある質問

What is camelCase used for?

camelCase is the standard naming convention for variables and functions in JavaScript, Java, and many other languages. The first word is lowercase and each subsequent word starts with a capital letter, e.g., myVariableName.

What is the difference between PascalCase and camelCase?

Both join words without spaces and capitalise each word, but PascalCase also capitalises the very first word. PascalCase is commonly used for class names and components (e.g., MyComponent), while camelCase is used for variables and functions (e.g., myComponent).

When should I use snake_case vs kebab-case?

Use snake_case for variable and function names in Python, Ruby, and SQL column names. Use kebab-case for CSS class names, HTML attributes, and URL slugs, since hyphens are more readable in those contexts and do not require escaping.

Can this tool convert mixed-format input?

Yes. The converter intelligently detects word boundaries in camelCase, PascalCase, snake_case, and kebab-case inputs, so you can convert between any formats without manually inserting spaces first.

Does it handle multi-line text?

Yes. The conversion is applied to the entire input, including text across multiple lines. Each line is processed independently, preserving the original line breaks in the output.

Case Converterの完全ガイド：無料オンラインツール

ブラウザ完結で安全・高速なCase Converter。開発者やクリエイターの作業を効率化

テキストの大文字小文字を変換。を瞬時に実現する無料ツールです。面倒なソフトのインストールは不要で、安全にブラウザ上で処理できます。

Case Converterが選ばれる理由

  • 高速処理: ミリ秒単位で即時実行。
  • プライバシー保護: データは端末外に送信されません。
  • 完全無料: 登録不要で制限なく利用可能。

簡単な3つの利用手順

  1. Case Converterのページを開きます。
  2. データを入力または貼り付けます。
  3. 結果を確認してコピーまたは保存します。

機能比較

項目 Metoolzy Case Converter 他社オンラインツール 専用ソフト
料金 完全無料 制限あり 有料ライセンス
セキュリティ 完全ローカル処理 サーバー送信あり ローカル処理

主な活用シーン

  • エンジニアの開発・デバッグ効率化
  • Web制作者の日常作業
  • データ変換・最適化

よくある質問 (FAQ)

入力したデータは保存されますか？

いいえ、すべてブラウザ内で処理され保存されません。