Markdown Editor

A small, cross-platform Markdown reader / editor for Windows and macOS. Built with Tauri 2 + SvelteKit 5 + CodeMirror 6. Installer is ~10 MB.

Features

• Read-first view mode (single rendered pane) with edit mode toggle (split editor + preview) — Ctrl/Cmd+E
• Live rendering via markdown-it, syntax highlighting via highlight.js, Mermaid diagrams
• Apple System Colors theme (from Ghostty) — light and dark, tracks OS preference, manual toggle
• Auto-hiding hamburger sidebar with live Table of Contents, resizable width, persistent
• XSS-sanitized preview (DOMPurify); external links open in the system default browser
• Zoom (Ctrl+=/−/0 or Ctrl+scroll), persistent; transient zoom indicator
• .md / .markdown file association registered on install (double-click in Explorer/Finder opens here)

Dev

npm install
npm run tauri dev

First run compiles the Rust shell (several minutes).

Build installers

npm run tauri build

Artifacts land in src-tauri/target/release/bundle/. Run on the target OS — Tauri can't cross-compile the webview bindings.

Icon

icon.svg is the source. To re-render icon.png (1024×1024) after edits:

node scripts/render-icon.mjs
npm run tauri icon icon.png

Release

Push a v* tag to trigger the GitHub Actions matrix in .github/workflows/release.yml — produces a draft release with Windows .msi / .exe and macOS .dmg (Intel + Apple Silicon). Unsigned.