Romaji to Kana converter

Text tools

Paste romaji and convert it to hiragana or katakana. Long vowels, っ, and ん are handled correctly. Everything runs in your browser; your data is never uploaded.

What is this Romaji → Kana converter?

A free, browser-based tool that converts romaji into Japanese kana. Paste your romaji, pick the target script (hiragana or katakana), and the result appears instantly. It uses a Hepburn-style mapping (shi, tsu, chi, ji, fu, and ya/yu/yo combos like kya and sha) and handles the tricky cases: gemination becomes the small tsu (kitte → きって), the syllabic n becomes ん (shinbun → しんぶん), and long vowels are spelled out (toukyou → とうきょう). Everything runs locally in your browser, so your text is never uploaded.

How to use it

  1. Type or paste your romaji into the box on the left.
  2. Choose the target script — hiragana or katakana.
  3. Read the converted kana on the right and copy it with one click.

Common use cases

  • Turning romaji names or place names into kana for forms, captions, or furigana.
  • Quickly producing katakana for loanwords or product names from romaji.
  • Helping Japanese learners check how romaji maps onto hiragana, including っ and ん.

Other text tools

Operated by

unbounded pioneering inc
Timothe AI

Tools by Timothe AI is a suite of free tools built and operated by unbounded pioneering inc, the company behind Timothe AI.

Ryosuke Suzuki
Ryosuke SuzukiFounder & CEO

Founder & CEO of Unbounded Pioneering Inc., the company behind Timothe AI, and an expert in machine learning and AI product development. He began his career in machine learning research at a university laboratory, then designed and built large-scale products as a software engineer at PLAID, Rakuten, and Recruit, while also driving new business development. Now specializing in generative AI and AI products, he works across both engineering and business development, and is a named inventor on multiple granted patents in web technology.

Named inventor on granted patents JP6887648 & JP7480958 · Patent pending on Timothe AI technology

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