Convert tools

Fullwidth / Halfwidth Converter

Convert fullwidth and halfwidth letters, numbers, spaces and Japanese katakana.

Convert in your browser · No sign-up

Hiragana and kanji stay unchanged. Voiced katakana may use two halfwidth characters; unrelated compatibility symbols are preserved.

Up to 100,000 UTF-16 units per input · 0 / 100,000

How to use

  1. Paste your text or load the example.
  2. Choose the mode or options, then run the tool.
  3. Review the result, then copy or download the TXT file.

Example

ＡＢＣ １２３ ガ → ABC 123 ｶﾞ

Details and limitations

Convert fullwidth and halfwidth letters, numbers, spaces and Japanese katakana.

Hiragana and kanji stay unchanged. Voiced katakana may use two halfwidth characters; unrelated compatibility symbols are preserved.

Text stays in your browser; it is not sent to a conversion server.

Format references

Tool page updated: