offline‑md‑editor‑viewer: A Single‑File, Offline Markdown Editor

The author presents offline‑md‑editor‑viewer, a lightweight Markdown editor that runs as a single HTML file and also as a Tauri desktop app, enabling full offline editing of local .md files without cloud sync or network calls. The editor supports live preview, a folder tree view, dark and light themes, and privacy‑focused design, saving changes directly back to the original file. It is built with vanilla JavaScript and CSS, avoiding heavy dependencies, and can be opened on Windows, Linux, and macOS. The project is hosted on GitHub, and the author invites developers to provide feedback on its usability for local notes, documentation, or markdown files. The editor’s architecture consists of a single-page application that reads the file system via the browser’s File System Access API or Tauri’s file APIs, renders Markdown to HTML, and writes back on save. The author emphasizes that the tool requires no account or sync, making it suitable for environments with strict privacy or offline constraints. The article includes a demo video hosted on GitHub and screenshots of the editor’s interface. The editor is open source, allowing contributors to extend features such as custom themes or plugin support. The author hopes the tool will be adopted by teams that need a quick, secure markdown editor without the overhead of Electron or cloud services.