Japanese Era Converter
Convert between Japanese era years and the Gregorian calendar.
全/半
Full-width / Half-width Converter
Convert between full-width and half-width characters.
ABC123 ｶﾀｶﾅﾃｽﾄ ｶﾞｷﾞｸﾞ
Über Full-width / Half-width Converter
Mixed full-width and half-width characters are a common source of form validation errors and missed database matches — full-width digits in a phone number, or stray half-width katakana in a name field.
This tool lets you toggle alphanumerics, katakana, and symbols (including spaces) independently. Katakana conversion correctly decomposes and recomposes voiced (dakuten) and semi-voiced (handakuten) sounds.
Kanji and hiragana are left untouched. Half-width katakana conversion also covers punctuation marks like 。、「」・.
So funktioniert's
- Choose the direction (to half-width or to full-width)
- Choose which character classes to convert
- Paste text and copy the result
FAQ
Does it handle voiced and semi-voiced katakana?
Yes. “ガ” converts to half-width “ｶﾞ” (base + dakuten mark) and back, and the same applies to semi-voiced sounds.
Are kanji and hiragana converted too?
No. Only alphanumerics, katakana, and symbols/space are converted — kanji and hiragana are left as-is.
Is my text sent anywhere?
No. Conversion runs entirely in your browser; nothing is sent to toco.tools servers.