Note

The source code is at monorepo/packages/flashtype. This repo serves as an issue tracker.

⚡ Flashtype

A Claude Code-style WYSIWYG markdown editor in the browser.

Flashtype delivers a Claude Code-like experience for markdown editing with true WYSIWYG rendering, AI-powered assistance, and markdown as source of truth. Built on Lix for change control, it runs entirely in your browser with zero installation required.

🚀 Why Flashtype?

Claude Code experience. WYSIWYG markdown. Markdown as source of truth.

• 👁️ WYSIWYG Markdown — no annoying previews, see formatted text as you type
• 🌐 Runs in Browser — zero installation, works everywhere, no server needed
• 🤖 Claude Code AI — diffs, accept/reject changes, contextual assistance
• 📋 Markdown Source of Truth — no import/export, markdown is your actual document format

Problems Flashtype solves

Problem	Flashtype Solution
Annoying preview tabs and mode switching	True WYSIWYG markdown rendering
Installing heavy desktop apps for markdown editing	Runs entirely in browser, zero install
Poor AI integration in existing editors	Claude Code-style AI with diffs & accept/reject
Markdown compatibility issues between tools	Uses markdown as source of truth - works everywhere

🧠 What Makes Flashtype Different

👁️ WYSIWYG Markdown in Browser

No more annoying preview tabs. Type # Heading and see it rendered as a heading instantly. Format text with **bold** and see it bold immediately. Pure WYSIWYG markdown editing - what you see is what you get.

🌐 Zero Install, Runs Anywhere

Open in any browser - Chrome, Safari, Firefox. No downloads, no installations, no desktop apps. Your documents live in browser storage, work offline, and sync optionally.

Flashtype is also installable as a Progressive Web App (PWA). In any supported browser, open the app, choose Install from the address bar menu, and you’ll get a standalone window with offline support and taskbar/dock integration.

🤖 Claude Code AI Experience

AI that understands your markdown. Generate content, get suggestions, review diffs, and accept/reject changes just like Claude Code. Copy your markdown and paste it directly into ChatGPT or any other tool.

📋 Markdown as Source of Truth

No lossy import/export cycles. Your document IS markdown, not converted to/from markdown. Copy from Flashtype → paste into GitHub → paste back into Flashtype with zero data loss. No vendor lock-in, no proprietary formats.

💡 Why This Matters:

• Most editors convert markdown to their own format, creating lossy copy/paste
• Flashtype treats markdown as the native format - no conversion needed
• True lossless workflows between ChatGPT, GitHub, Discord, and more

🎯 Perfect For

• Technical writers who copy/paste between tools and need AI assistance
• Content creators tired of preview tabs and want seamless markdown editing
• Developers who want GitHub-compatible markdown without desktop apps
• Anyone who works with ChatGPT and wants lossless markdown workflows