Kana to Romaji converter

Text tools

Convert hiragana and katakana to romaji with Hepburn or Kunrei. Everything runs in your browser; your data is never uploaded.

What is this Kana to Romaji converter?

A free, browser-based tool that converts Japanese kana (hiragana and katakana) into romaji. Choose between the Hepburn system (shi, tsu, chi, fu, ji), used on passports and signage, or the Kunrei system (si, tu, ti, hu, zi), used in schools and the JIS standard. It handles the sokuon (っ → double consonant), the syllabic n (ん → n / n'), yoon digraphs (きゃ → kya), and the long-vowel mark (ー). Everything runs locally in your browser, so your text is never uploaded.

How to use it

  1. Type or paste your kana (hiragana or katakana) into the box on the left.
  2. Choose the romanization system — Hepburn or Kunrei.
  3. Copy the romaji result or download it as a text file.

Common use cases

  • Romanizing names and place names for passports, forms, or English-language documents.
  • Preparing romaji labels or slugs for URLs, file names, and data exports.
  • Helping learners read kana by showing the Hepburn or Kunrei spelling.

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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