MarkView - Modern Markdown Viewer

View markdown files with local folder navigation, syntax highlighting, and beautiful themes

Transform your Markdown files into beautifully rendered documents with MarkView - the most powerful and elegant Markdown viewer and reader for Chrome. Whether you're a developer reading README files, a technical writer previewing documentation, or a student reviewing lecture notes, MarkView delivers professional markdown rendering with zero data collection. 🎯 WHY CHOOSE MARKVIEW? MarkView is the complete markdown solution for Chrome, trusted by developers and writers worldwide. View local markdown files, GitHub documentation, GitLab wikis, and any markdown content with stunning visual quality. No setup required - just install and start viewing beautiful markdown instantly. ✨ KEY FEATURES 📝 PROFESSIONAL MARKDOWN RENDERING • GitHub Flavored Markdown (GFM) support - full compatibility with GitHub markdown syntax • GitHub-style alert boxes: Note, Tip, Important, Warning, and Caution with color-coded styling • Extended markdown features: tables, task lists, strikethrough, footnotes, and auto-linking • Instant rendering with professional typography and spacing • HTML rendering support for rich content • Emoji support for expressive documentation 🚀 ✨ • Horizontal rules, blockquotes, nested lists, and more 💻 ADVANCED SYNTAX HIGHLIGHTING • 180+ programming languages supported (Python, JavaScript, TypeScript, Java, C++, Go, Rust, PHP, Ruby, Swift, Kotlin, and more) • 10+ beautiful syntax themes: Atom One Dark, GitHub Dark/Light, Monokai, Nord, Dracula, Solarized, and more • Automatic language detection for code blocks • Line numbers and syntax coloring for easy code reading • One-click copy button on all code blocks - copy code instantly • Perfect for developers reading README.md, API docs, and technical documentation 📊 POWERFUL DIAGRAM & MATH SUPPORT • Mermaid diagrams: flowcharts, sequence diagrams, Gantt charts, ER diagrams, state diagrams, Git graphs, and more • Download Mermaid diagrams as SVG or PNG images - perfect for presentations and documentation • Interactive diagram zoom and pan capabilities with smooth controls • KaTeX math equations: both inline ($equation$) and display mode ($$equation$$) • Support for complex mathematical notation, formulas, and scientific equations • Ideal for academic papers, research notes, and technical documentation 🎨 BEAUTIFUL THEMES & CUSTOMIZATION • Dark and light themes with automatic system detection • Redesigned popup interface with modern tab-styled navigation for easier access • Quick links to What's New page and Report Issue page directly in popup • 9 premium font options: Inter, Merriweather, Roboto, Roboto Mono, Open Sans, Lora, Source Sans, Georgia, Crimson Text, and System Default • Adjustable font size (12px-24px) for optimal reading comfort • Customizable line height (1.0-2.5) for perfect spacing • Content width options (600px-1200px) to match your preference • Centered or full-width layout modes • Responsive design that adapts to any screen size 📁 SMART NAVIGATION & FILE MANAGEMENT • Automatic Table of Contents (TOC) generation from markdown headings • Collapsible TOC sidebar with smooth scrolling and active section highlighting • Folder browser for local markdown files - navigate your project structure easily • Recent Documents tracking - quickly access recently opened markdown files from popup • Toggle TOC visibility for focused reading 🖼️ ENHANCED IMAGE VIEWING • Click any image to open fullscreen lightbox viewer • Gallery navigation with next/previous buttons and keyboard shortcuts • Lazy image loading for better performance with image-heavy documents • Support for local images, external images, and GitHub-hosted images ⚡ PRODUCTIVITY FEATURES • Export to Word (DOCX) and HTML formats - professional document export with perfect formatting • Live auto-refresh: automatically reload when markdown files change (perfect for writing and editing) • Raw markdown view toggle - instantly switch between rendered and source view • Expandable action button with quick access to export, print, and layout options • Scroll-to-top button for long documents • Theme toggle button for quick switching between dark and light modes • Print-friendly layouts - clean printing without UI elements 🌐 WORKS EVERYWHERE • Local markdown files (file:///) - enable "Allow access to file URLs" in Chrome settings • Remote URLs (http:// and https://) - works on any website • GitHub raw files - perfect for viewing GitHub markdown documentation • GitLab markdown files - compatible with GitLab wikis and READMEs • Bitbucket, Gitea, and other Git hosting platforms • Documentation sites, blogs, and static site generators • Any URL serving .md, .markdown, .mkd, or .mdx files 🔒 100% PRIVACY-FOCUSED • ZERO data collection - we don't collect any personal information whatsoever • No analytics, no tracking, no telemetry, no cloud services • All markdown processing happens locally in your browser • Your files never leave your device • Settings stored only on your device using Chrome's local storage • Open architecture using trusted, audited libraries (markdown-it, highlight.js, KaTeX, Mermaid) • Perfect for viewing sensitive documentation, private notes, and confidential files 🌍 MULTILINGUAL INTERFACE • 11 languages supported: English, Deutsch (German), Español (Spanish), Français (French), Bahasa Indonesia (Indonesian), 日本語 (Japanese), 한국어 (Korean), Português (Portuguese), Tiếng Việt (Vietnamese), 简体中文 (Simplified Chinese), 繁體中文 (Traditional Chinese) • Automatic language detection based on your browser settings • Complete UI translation including all settings, tooltips, buttons, and error messages • Great for international teams and multilingual developers 👥 PERFECT FOR ✅ Software Developers • Read README.md, CHANGELOG.md, CONTRIBUTING.md files with beautiful formatting • View API documentation and technical specifications • Preview markdown before committing to GitHub/GitLab • Study code documentation with syntax highlighting ✅ Technical Writers • Preview documentation while writing • Test markdown rendering before publication • View documentation from various sources • Create professional-looking documentation ✅ Students & Educators • View lecture notes in markdown format • Read academic papers with math equations • Study programming tutorials with code examples • Review assignment instructions ✅ Data Scientists & Researchers • View Jupyter notebook markdown cells • Read research notes with mathematical formulas • Preview data analysis documentation • View scientific papers with equations and diagrams ✅ Content Creators • Preview blog posts written in markdown • View documentation for static site generators (Jekyll, Hugo, Gatsby) • Read markdown-based CMS content • Review technical articles before publishing 🚀 QUICK START GUIDE 1. **Install MarkView** - Click "Add to Chrome" button (takes 2 seconds) 2. **Enable file access** (optional, for local files): - Open chrome://extensions/ - Find MarkView → Click "Details" - Toggle ON "Allow access to file URLs" 3. **Open any markdown file** - Drag and drop, File → Open, or click .md links 4. **Enjoy beautiful markdown** - Instant professional rendering! 💡 PRO TIPS • Use Ctrl+O (Cmd+O on Mac) to quickly open local markdown files • Enable auto-refresh while editing markdown to see live updates • Try different syntax highlighting themes to match your preference • Toggle TOC sidebar (Ctrl+Shift+O) for documents with many headings • Use centered layout mode for distraction-free reading • Switch to raw view (click "Raw" button) to debug markdown syntax • Adjust font size and line height for optimal reading comfort 🔧 TECHNICAL SPECIFICATIONS • Extension type: Manifest V3 compliant (latest Chrome standard) • Performance: Lightweight with <5% CPU usage during rendering • Memory footprint: ~45 MB for typical markdown files • File size support: Handles markdown files up to 10 MB smoothly • Compatibility: Chrome 88+, Edge 88+, Brave, Opera, and other Chromium browsers • Architecture: Service worker background script, content scripts, and isolated popup • Dependencies: markdown-it, highlight.js, KaTeX, Mermaid, DOMPurify (all bundled) 📦 SUPPORTED FILE TYPES & FORMATS • Extensions: .md, .markdown, .mkd, .mdx • Protocols: file:///, http://, https:// • Markdown flavors: GitHub Flavored Markdown (GFM), CommonMark, extended markdown • Code languages: 180+ including Python, JavaScript, TypeScript, Java, C, C++, C#, Go, Rust, PHP, Ruby, Swift, Kotlin, Scala, R, Julia, Perl, Shell, Bash, SQL, HTML, CSS, SCSS, JSON, YAML, XML, Markdown, and many more • Diagram types: Mermaid flowcharts, sequence diagrams, class diagrams, state diagrams, ER diagrams, Gantt charts, Git graphs, pie charts, and more 📞 SUPPORT & COMMUNITY Need help? We're here for you! • **GitHub Issues**: Report bugs and request features at https://github.com/getmarkview/support • **FAQ**: Comprehensive answers at https://getmarkview.github.io/support.html • **Email**: Security issues or private matters: markview.app@gmail.com • **Response time**: Critical bugs within 24 hours, features within 3-5 days We welcome: ✅ Bug reports with detailed reproduction steps ✅ Feature requests with use case descriptions ✅ Questions about functionality and settings ✅ Feedback on user experience and design 🔗 IMPORTANT LINKS • **Website**: https://getmarkview.github.io/ • **Support & FAQ**: https://getmarkview.github.io/support.html • **GitHub Issues**: https://github.com/getmarkview/support • **Privacy Policy**: https://getmarkview.github.io/privacy-policy.html • **Terms of Service**: https://getmarkview.github.io/terms.html 🏆 WHY USERS LOVE MARKVIEW ⭐ "Finally, a markdown viewer that actually looks professional!" ⭐ "The syntax highlighting is perfect for reading code documentation" ⭐ "Love the dark theme and customization options" ⭐ "Privacy-focused with no data collection - exactly what I needed" ⭐ "Mermaid diagram support is a game-changer for technical docs" ⭐ "Works flawlessly with GitHub raw files" 💎 FREE WITH OPTIONAL PREMIUM FEATURES MarkView is free to use! As we grow, we may introduce optional premium features to support continued development. Core markdown viewing will always remain accessible to everyone. 🔐 SECURITY & PERMISSIONS MarkView requests minimal permissions: • **Storage**: Save your theme, font, and layout preferences locally • **ActiveTab**: Read markdown content from the current tab for rendering • **File URLs**: Access local .md files (disabled by default - you must enable manually) • **Host Permissions**: Render markdown from any website (GitHub, GitLab, documentation sites) All processing is local. No data is ever transmitted to external servers. 🎯 KEYWORDS FOR SEARCH markdown viewer, markdown reader, markdown chrome extension, md viewer, markdown preview, github markdown viewer, markdown file viewer, markdown renderer, syntax highlighter, code highlighter, mermaid viewer, math equation viewer, katex viewer, markdown browser, markdown extension, readme viewer, documentation viewer, technical documentation, markdown formatter, markdown parser, github flavored markdown, gfm viewer, local file viewer, markdown with diagrams, markdown with math --- 📥 **Install MarkView now and transform how you read markdown files!** Click "Add to Chrome" to get started in seconds. Join thousands of developers, writers, and students who trust MarkView for beautiful, private, and powerful markdown viewing. Transform your markdown experience today! 🚀