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Gukhanmun is a Korean text conversion tool developed by Hong Minhee that transforms mixed-script Korean writing into hangul-only text. Mixed-script Korean, known as gukhanmun style, interleaves hanja (Chinese characters) with hangul syllabic characters, a convention historically common in newspapers, academic publications, and official documents. Gukhanmun automates the process of replacing those embedded hanja characters with their hangul readings, producing output written entirely in the Korean alphabet. This conversion is useful for readers who are not familiar with hanja, for accessibility purposes, for preparing text for audiences such as language learners or younger readers, and for downstream processing pipelines that expect purely hangul input. It can also assist in normalizing legacy documents for modern digital distribution, where hangul-only presentation is the prevailing standard. The software is distributed in two forms: a Rust library, which allows developers to integrate the conversion functionality directly into their own Rust applications, and a command-line tool, which enables standalone use in scripts, batch workflows, and manual document processing. Gukhanmun supports three input formats: plain text, HTML, and Markdown. This format support means that structured documents can be converted without requiring users to strip markup beforehand, making the tool suitable for processing web content and documentation sources in addition to simple text files. As a text processing utility, Gukhanmun falls into the category of natural language tools and document conversion software, with a specific focus on the Korean writing system. It is written in the Rust programming language, consistent with its distribution as a Rust library. The project has seen two published versions so far, and the current release is version 0.2.0. The low version number indicates that the software is in an early stage of development, with its public API and feature set potentially subject to change as the project matures. Users integrating the library into their own projects should account for this when specifying version requirements.
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