Text Case Converter

Convert text to UPPERCASE, lowercase, camelCase, snake_case, kebab-case, and more

🔒 100% ブラウザ内🆓 ずっと無料⚡ サインアップ不要
注意: 下記のツールインターフェースは現時点で英語のみに対応しています。UI の翻訳は順次進めています。 このツールを英語で見る →

使い方

  1. 1
    Paste your text

    Drop any text into the input box.

  2. 2
    Pick a case

    Click the case you want - UPPER, lower, Title, camel, snake, kebab, PascalCase, or CONSTANT.

  3. 3
    Copy the result

    The converted output appears instantly. Copy it with one click.

Text Case Converter について

Free online text case converter. Instantly convert any text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, or CONSTANT_CASE. Perfect for renaming variables, formatting headings, or normalizing data. 712 Tools の Text Case Converter はモダンな JavaScript API を使って完全にブラウザ内で動作します - サーバーがあなたのデータを見ることは一切ありません。つまり、即時の結果、完全なプライバシー、アップロード制限なしです。

デバッグ、簡単な確認、あるいは本番のインシデント対応まで - このツールは何度でも無料で使えます。ウォーターマークなし、サインアップなし、ツール内広告なし。

よくある質問

Does Title Case follow style-guide rules?

It capitalizes every word for simplicity. It doesn't downcase short prepositions like 'of' or 'and' - that's a style choice we leave to you.

How is camelCase different from PascalCase?

camelCase leaves the first letter lowercase (myVariable). PascalCase capitalizes it (MyClass). Both are used heavily in JavaScript, Java, and C#.

Does snake_case handle numbers and symbols?

Yes - digits stay in place, and any non-alphanumeric character becomes a single underscore separator.

Is my text sent anywhere?

No. All conversion runs in your browser via native string methods.

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