Full-width letters
ABC becomes ＡＢＣ. These are different Unicode characters even though the letters are recognizable.
FULL-WIDTH / HALF-WIDTH CONVERTER
Make your text fit the form’s rules.
Convert arbitrary text between the character-width formats Japanese websites commonly require.
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Copy the width you needCharacters without an equivalent are preserved
ＡＢＣ１２３ テスト
Latin letters, numbers, spaces, punctuation, and half-width Katakana are converted where supported.
ABC123 ﾃｽﾄ
Full-width Latin characters and Katakana are narrowed where a standard half-width form exists.
全角・半角 CONVERTER
Why won’t a Japanese website accept my text?
The text can look correct while using the wrong underlying width. If the form says 全角, use full-width; if it says 半角, use half-width.
Half-width Katakana
テスト becomes ﾃｽﾄ. Not every Japanese character has a half-width equivalent.
Spaces count too
A normal space and a full-width Japanese space are different characters and can trigger validation errors.