Rune

What it does

Rune is a focused, fast Markdown editor for desktop. In one pane, your Markdown formats the moment you type — only the line you're on shows raw source. Code, Mermaid diagrams, KaTeX math, and tables render right where you write them, while the page stays calm. Local-first (plainmd files), built on Rust so it opens instantly and stays small. Korean/CJK is first-class. Free & open source (MIT) for macOS, Windows, and Linux.

Rune is a focused, fast markdown writer for desktop. Code, diagrams, and math turn live as you type — while the page stays calm. Free, open source, for macOS, Windows, and Linux.

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  Rune – A focused Markdown writer for desktop (Tauri/Rust)Jun 2026 · github.com · ▲5

  Hello, I'm Hyunbin. Recently I made 'Rune' which is a small desktop .md writer/editor. I am aware that there are a lot of .md editor out there. but i wanted to build .md editor by myself. Major features : - Atomic Saves (write-temp -> fsync -> rename) so a crash can't corrupt a file, debounced autosave. - Pasted/dropped images are content-addressed (sha256) into an assets. - Workspace folder + file tree, Chrome-style tabs - Interactive task checkboxes, readable/wide width toggle; self-contained HTML and PDF export - currently supports…

• RJ
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• RT
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• EM
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