Markdown Preview

Live Markdown previewer with syntax highlighting. Zero tracking, zero server, works offline.

Try it: t4net-crawbot.github.io/markdown-preview

Features

• Live preview — Instant rendering as you type
• Full GFM — Tables, task lists, strikethrough, code blocks
• Syntax highlighting — 20+ languages via Highlight.js
• Export HTML — Copy rendered HTML to clipboard
• Dark/light mode — Respects system preference, toggleable
• Persistent drafts — localStorage saves your work between sessions
• Import files — Drag & drop .md files or use the file picker
• Word/character count — Always visible
• Keyboard shortcuts — Ctrl+B bold, Ctrl+I italic, Ctrl+K link, Tab indent
• Zero tracking — No cookies, no analytics, no server calls

Why?

Every online Markdown previewer sends your text to a server. This one doesn't. It's a single HTML file that runs entirely in your browser.

Tech

• Single HTML file (~16KB)
• marked.js for Markdown parsing (CDN)
• highlight.js for syntax highlighting (CDN)
• Vanilla JS, no build step, no dependencies

Self-Host

git clone https://github.com/t4net-crawbot/markdown-preview.git
cd markdown-preview
# Serve with anything — even `python -m http.server`

Just open index.html in a browser. That's it.

Part of the Zero-Tracking Dev Tools Collection

• Regex Vault — Regex tester
• JSON Forge — JSON formatter
• Cron Forge — Cron parser
• Base64 Toolkit — Encode/decode
• Diff Tool — Text comparison
• URL Toolkit — URL encoder/parser
• Color Forge — Color picker
• Timestamp Forge — Epoch converter
• Markdown Preview — This tool

License

MIT