Rune

Rune is a sleek and highly focused Markdown editor designed for developers, writers, and technical users who value real-time rendering and a distraction-free workspace. Built on Rust for instant startup and minimal resource usage, Rune offers a unique single-pane interface where Markdown syntax is automatically rendered as you type, with only the current line in raw source. It supports code snippets, Mermaid diagrams, KaTeX math formulas, and tables, all rendered inline to enhance the editing experience. Its emphasis on local-first storage ensures privacy and fast access to plain Markdown files, making it ideal for those who prefer to keep their projects offline. Additionally, Rune offers first-class support for Korean and CJK characters, making it accessible for a global audience. As an open-source project under the MIT license, Rune provides a free, lightweight, and extendable environment for Markdown editing that caters to both casual users and professionals alike.