Hiragana / Katakana Converter

The Hiragana to Katakana Converter normalizes Japanese kana text in both directions. Convert hiragana to katakana, katakana to hiragana, and handle mixed half-width katakana input in one browser tool.

Hiragana is commonly used for native Japanese words, grammar endings, and beginner learning material, while katakana is often used for loanwords, emphasis, sound effects, and pronunciation guides. Japanese learners can switch scripts while practicing vocabulary, making worksheets, or checking furigana fields without changing kanji, Latin letters, numbers, or symbols.

The converter handles common kana features such as dakuten, handakuten, small kana like ゃゅょっ, and long vowel marks within the supported conversion range. For example, しょうがっこう becomes ショウガッコウ, and ｺﾝﾆﾁﾊ can be normalized through full-width katakana and converted to こんにちは. This is useful for name furigana, product names, contact lists, CSV import cleanup, and learning material preparation.

Half-width katakana often appears in older databases, form exports, file names, and CSV data. It looks similar to standard katakana but uses different Unicode characters, which may break sorting, matching, or search filters. Normalizing it before conversion keeps ecommerce data, contact lists, classroom materials, and keyword lists more consistent.

Related Tools Use the [Full-width / Half-width Converter](/en/text/full-width-half-width-converter/) when alphanumerics also need cleanup. Use the [Unicode Normalizer](/en/dev/unicode-normalizer/) to inspect normalization differences, or the [Word Counter](/en/text/word-counter/) to count characters and UTF-8 bytes.

Everything runs locally in your browser, so your text is not uploaded to a server. No account is required, and the tool is free to use on desktop or mobile.