What this converter can do
- Fullwidth ↔ halfwidth for ASCII digits, letters, and symbols.
- Hiragana ↔ Katakana and Katakana full ↔ half width.
- Optional space normalization that respects line breaks.
- Auto-converts as you type, with one-click copy for results.
Convert instantly
Clean up Japanese text
Paste text, pick a conversion type, and see the result update automatically. No data leaves your browser.
Switch between kana or width styles without reformatting the rest of your text.
Preview
Frequently asked questions
Does the text leave my browser?
No. All conversions run locally, so pasted names or drafts never leave your device.
What does Normalize spaces do?
It collapses repeated spaces and tabs (including fullwidth spaces) into single spaces per line, keeping line breaks while cleaning extra spacing.