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sokcuri/hdTrans

An offline, rule-based Japanese-to-Korean translator with a bundled dictionary, Windows GUI, CLI, and hooks for ezTrans-compatible tools.

Open-source alternative to:ezTrans

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What is it?

hdTrans is an offline Japanese-to-Korean translation program built on a rule-based engine and a bundled dictionary, so it works without a network connection once extracted. It ships as a Windows release with a translation window and document translation, as well as a command-line tool for Windows, Linux and macOS. It can also be installed from npm as a CLI or as a JavaScript/TypeScript library that runs a WASM engine.

The project targets common Japanese-to-Korean output problems, such as mistranslated onomatopoeia, interjections and ambiguous words, using user dictionaries and rule tweaks. A speech-style option switches sentence endings between formal-plain '-다' and casual speech, and the document mode uses surrounding lines for context such as names and multi-line quotes.

For Windows users, the native engine can be connected to visual novel and game translation tools that work with ezTrans-style engines. Users can add their own entries through a tab-separated UTF-8 user dictionary.

Key features

  • 01Offline translation with a bundled dictionary and engine.
  • 02Windows translation window with document translation for multiple files.
  • 03Command-line tool with UTF-8 input and output files.
  • 04npm package with a JavaScript and TypeScript API.
  • 05Switchable strict and soft speech styles for sentence endings.
  • 06Tab-separated user dictionary for custom term translations.

Use cases

  • Translating Japanese novels, documents or text files into Korean offline.
  • Adding Korean translation to Japanese visual novels or games through compatible tools.
  • Calling Japanese-to-Korean translation from a Node.js or TypeScript application.
  • Fixing recurring mistranslations by adding entries to a personal dictionary.

Quick start

  1. 1

    Install the command-line tool with npm (requires Node.js 22 or later)

    npm install -g hdtrans
  2. 2

    Translate a UTF-8 Japanese text file into Korean

    hdtrans --in input.ja.txt --out output.ko.txt
  3. 3

    Or on Windows, download the hdTrans zip from the Releases page and run hdTransGUI.exe

Things to know

  • It translates only Japanese to Korean.
  • It is rule-based, so output quality varies with sentence style and dictionary coverage.
  • The Windows GUI and ezTrans-compatible engine are Windows-only.
  • It is licensed under MPL-2.0, a copyleft license that requires sharing changes to modified MPL-covered files.

In collections

Windows apps and utilitiesCLI & terminal toolsPrivacy & local-first toolsNatural language processing tools & libraries

Topics

#translation#japanese#korean#offline#rule-based#nlp#cli#windows

FAQ

What is hdTrans?
An offline, rule-based Japanese-to-Korean translator with a bundled dictionary, Windows GUI, CLI, and hooks for ezTrans-compatible tools. hdTrans is an offline Japanese-to-Korean translation program built on a rule-based engine and a bundled dictionary, so it works without a network connection once extracted. It ships as a Windows release with a translation window and document translation, as well as a command-line tool for Windows, Linux and macOS. It can also be installed from npm as a CLI or as a JavaScript/TypeScript library that runs a WASM engine.
Is hdTrans free to use? What license does it have?
hdTrans is open source under the MPL-2.0 license. Check the license terms before using it in commercial products.
Is hdTrans still maintained?
Actively maintained. The last commit to hdTrans was on Nov 6, 2026.
What can I use hdTrans for?
Translating Japanese novels, documents or text files into Korean offline. Adding Korean translation to Japanese visual novels or games through compatible tools. Calling Japanese-to-Korean translation from a Node.js or TypeScript application. Fixing recurring mistranslations by adding entries to a personal dictionary.
How do I install hdTrans?
Install the command-line tool with npm (requires Node.js 22 or later): npm install -g hdtrans Translate a UTF-8 Japanese text file into Korean: hdtrans --in input.ja.txt --out output.ko.txt Or on Windows, download the hdTrans zip from the Releases page and run hdTransGUI.exe
Where can I get hdTrans?
The source code and installation instructions are on GitHub: https://github.com/sokcuri/hdTrans

Summary generated by AI from the project's README. GitHub stats refresh daily.

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