Bonsai MD

Bonsai MD — the Markdown editor that launches before you finish clicking.

Built from the ground up for macOS, Bonsai MD is an ultra-lightweight Markdown viewer and editor that opens your files instantly. No Electron. No bloat. No subscriptions. Just a blazing-fast native app that does one thing exceptionally well.

LIGHTNING FAST

Sub-second cold launch — your files open before you blink
Handles massive Markdown files with progressive rendering
Pre-warmed rendering engine eliminates wait times
FULL MARKDOWN EDITING

Rich editing toolbar: bold, italic, strikethrough, code, quotes, lists, tables, and more
Live preview with GitHub-flavored Markdown rendering
Side-by-side editor and preview with instant updates
Table of contents sidebar for easy document navigation
BEAUTIFUL PREVIEW RENDERING

Syntax-highlighted code blocks in 190+ languages
LaTeX math rendering with KaTeX (inline and display)
Mermaid diagram support for flowcharts, sequence diagrams, and more
GitHub-flavored tables, task lists, and blockquotes
THEMES & FONTS

Multiple themes: System Default, Newsprint, Dracula, Neon
8+ font choices including Inter, Playfair Display, IBM Plex Mono, and JetBrains Mono
OpenDyslexic font for accessibility
Adjustable font sizes
Full dark mode support
EXPORT EVERYWHERE

Export to PDF, HTML, Plain Text, DOCX, YAML, XML, and JSON
Share directly from the menu bar
DESIGNED FOR EVERYONE

Liquid Glass design language — feels right at home on macOS
Arabic and RTL language support
Dyslexic-friendly font option
Fully sandboxed for your security
100% OFFLINE & PRIVATE

No internet connection required — ever
No telemetry, no analytics, no accounts
Your documents stay on your Mac
Bonsai MD is for developers, writers, students, and anyone who works with Markdown and wants an app that just works — instantly.