docx-editor is an open-source, MIT-licensed WYSIWYG editor for Microsoft Word documents built to run entirely in the browser. A React library that stays native to .docx, no lossy round-trips, no mangled formatting. Supports real-time collaboration, track changes, threaded comments, tables, images, hyperlinks, page layout, a plugin system, i18n, and a headless API for LLM-driven edits.