A powerful, lightweight, browser-based Markdown editor designed for simplicity, privacy, and productivity.

• Real-time Syntax Highlighting - Professional CodeMirror 6 integration with Markdown support
• Live Preview - Instant HTML rendering with synchronized scrolling
• Complete Formatting Toolbar - Visual buttons for all Markdown elements
• Multi-Tab Interface - Work with multiple documents simultaneously
• Search and Replace - Powerful find/replace with regex support

• 30+ Keyboard Shortcuts - Full shortcut support for all formatting operations
• Tab Management - Efficient keyboard-based tab switching and management
• Undo/Redo System - Comprehensive history with configurable debounce time

• Modern File System Integration - Native file save/open with File System Access API
• Legacy Browser Support - Download/upload fallback for older browsers
• Auto-Save to LocalStorage - Never lose your work with persistent storage
• GitHub Integration - Direct file loading and saving to GitHub repositories

• Complete Theme System - Full light/dark mode for entire interface with persistent settings
• Progressive Web App - Install as native app, works offline, with app shortcuts and notifications
• Comprehensive Settings Modal - Font size, debounce time, line numbers, auto-save preferences
• No Registration Required - Complete privacy, no cloud dependencies
• Responsive Design - Works perfectly on desktop and mobile
• Intuitive Toolbar - Visual buttons for all formatting options
• Multiple Preview Themes - Customizable preview styling with persistent selection
• Offline Indicator - Clear status when working without internet connection
• CodeMirror Themes - 30+ editor themes for personalized coding experience

Prerequisites: Node.js (v16 or higher)

# Clone and install
npm install

# Start development server
npm run dev

# Build for production
npm run build

• Ctrl/Cmd + B - Bold
• Ctrl/Cmd + I - Italic
• Ctrl/Cmd + D - Strikethrough
• Ctrl/Cmd + E - Code

• Ctrl/Cmd + 1 - # Header 1
• Ctrl/Cmd + 2 - ## Header 2
• Ctrl/Cmd + 3 - ### Header 3

• Ctrl/Cmd + U - Unordered list
• Ctrl/Cmd + O - Ordered list
• Ctrl/Cmd + Shift + C - Checklist
• Ctrl/Cmd + Q - Blockquote
• Ctrl/Cmd + T - Table

• Ctrl/Cmd + F - Search and replace
• Ctrl/Cmd + Z - Undo
• Ctrl/Cmd + K - Insert link
• Ctrl/Cmd + M - Insert image

• Ctrl/Cmd + Shift + T - New tab
• Ctrl/Cmd + W - Close tab (with unsaved changes protection)
• Ctrl/Cmd + Tab - Next tab
• Ctrl/Cmd + Shift + Tab - Previous tab
• Ctrl/Cmd + 1-9 - Switch to tab by number

• Markdown - Native .md file saving

• HTML - Complete standalone HTML documents with styling

• PDF - Professional PDF output with proper formatting

• DOCX - Microsoft Word documents with full Markdown support (headings, paragraphs, lists, blockquotes, code blocks, tables, images via base64 embedding), matching HTML styling (fonts, margins, borders) – browser-only generation using 'docx' library

• Markdown - Native .md file saving

• HTML - Complete standalone HTML documents with styling

• PDF - Professional PDF output with proper formatting

• CodeMirror 6 integration with Markdown syntax highlighting
• Custom keyboard shortcuts for all formatting operations
• Search and replace functionality
• Real-time content synchronization
• 30+ CodeMirror themes for personalized experience

• Live HTML rendering with marked.js
• Syntax highlighting for code blocks
• Multiple theme support
• Sanitized output with DOMPurify

• Complete formatting controls
• File operations (New, Open, Save, Export)
• GitHub integration button
• Help system dropdown

• Frontend: React 19.1.1, TypeScript 5.8.2, Vite 7.0.6
• Editor: CodeMirror 6 with 30+ themes
• Markdown Processing: marked 16.2.1, DOMPurify 3.2.6
• Syntax Highlighting: highlight.js 11.11.1 (12+ languages)
• Export: jsPDF 3.0.2, html2canvas 1.4.1
• GitHub Integration: @octokit/rest 22.0.0
• Styling: Tailwind CSS utility classes
• PWA: Workbox, Web Manifest

Install as a native application with:

• Offline functionality
• App shortcuts
• System notifications
• Home screen installation

• Zero Data Collection - No tracking, no analytics, no cloud storage
• Client-Side Only - All processing happens in your browser
• No Registration Required - Immediate access without account creation
• XSS Protection - DOMPurify sanitization of all HTML output
• Secure GitHub OAuth - Device flow authentication with token storage

1. Fork the repository
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a pull request

Distributed under the GPL License. See LICENSE for more information.

• CodeMirror - Powerful code editor component
• React - JavaScript library for building user interfaces
• Vite - Next generation frontend tooling
• marked - Markdown parser and compiler
• DOMPurify - DOM-only, super-fast, uber-tolerant XSS sanitizer
• highlight.js - Syntax highlighting for the web
• jsPDF - Client-side JavaScript PDF generation
• html2canvas - Screenshots with JavaScript
• Octokit - GitHub API client
• Tailwind CSS - Utility-first CSS framework