大文字変換

テキストをすぐに大文字に変換します。

テキストツール

大文字変換 の使い方

  1. 1Paste or type your text in the input box
  2. 2The text is converted to uppercase instantly as you type
  3. 3Copy the result or download it as a text file

大文字変換 について

Our uppercase converter instantly transforms any text into capital letters. Whether you need to format headings, create emphasis, or standardize data, this tool handles all Unicode characters including accented letters and international scripts.

Simply paste your text and the conversion happens in real time — no button press needed.

よくある質問

Does it work with accented characters?

Yes. The converter uses the JavaScript toUpperCase() method which handles all Unicode characters correctly.

Is there a text length limit?

No limit. All processing happens in your browser with no data sent to a server.