Fullwidth / Halfwidth Converter

Help & limits

Converts selected letters, digits, ASCII-width symbols/spaces and katakana only. Kanji, hiragana and compatibility symbols are preserved. Maximum 1 MB UTF-8.

Example: Ａ１ｶﾞ → A1 ｶﾞ (halfwidth) / Ａ１ガ (fullwidth)

Runs in your browser. No upload.