MarkView: Markdown Viewer with Mermaid Diagrams, Math & Export

Markdown viewer with syntax highlighting, Mermaid diagrams, KaTeX math, TOC, DOCX/HTML export, folder browser & themes.

View markdown files with syntax highlighting, Mermaid diagrams, KaTeX math, TOC, DOCX/HTML export, and folder browser. 100% privacy-focused with zero data collection. Works with local .md files, GitHub repos, GitLab wikis, and documentation sites. ✨ KEY FEATURES 📝 PROFESSIONAL MARKDOWN RENDERING • GitHub Flavored Markdown (GFM) with full compatibility • GitHub-style alert boxes (Note, Tip, Important, Warning, Caution) • Tables, task lists, strikethrough, footnotes, auto-linking, containers, definition lists, and more • Emoji support 🚀 ✨ • Professional typography with instant rendering 💻 SYNTAX HIGHLIGHTING • 180+ programming languages with auto-detection • 10+ themes: Atom One Dark, GitHub Dark/Light, Monokai, Nord, Dracula, Solarized • One-click copy button on all code blocks • Perfect for README.md, API docs, and technical documentation 📊 POWERFUL DIAGRAM & MATH SUPPORT • Mermaid diagrams: flowcharts, sequence, Gantt, ER diagrams, state diagrams, Git graphs, and more • Download diagrams as SVG/PNG images • Interactive zoom and pan controls • KaTeX math equations (inline and display mode) • Complex mathematical notation support • Ideal for academic papers and research notes 🎨 THEMES & CUSTOMIZATION • Dark and light themes with auto system detection • 9 font options: Inter, Merriweather, Merriweather Sans, Noto Sans, Noto Serif SC, Open Sans, Roboto, Source Sans 3, and Default (system fonts) • Adjustable font size (12-24px) and line height (1.2-2.0) • Content width options (600-1400px) • Centered or full-width layout modes ⚡ PRODUCTIVITY FEATURES • Export to DOCX and HTML with perfect formatting • Live auto-refresh when files change (perfect for writing and editing) • Raw markdown view toggle - instantly switch between rendered and source view • Table of Contents (TOC) with smooth scrolling • Folder browser for local markdown files - navigate your project structure easily • Folder Bookmarks - save and quickly access frequently used folders • Recent Documents tracking - quickly access recently opened markdown files from popup • Fullscreen image lightbox viewer • 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 (12 LANGUAGES) English, Deutsch, Español, Français, Bahasa Indonesia, 日本語, 한국어, Português, Tiếng Việt, 简体中文, 繁體中文, Русский 👥 PERFECT FOR • Developers reading README.md, CHANGELOG.md, API docs • Technical writers previewing documentation • Students viewing lecture notes with math equations • Data scientists reviewing Jupyter markdown cells • Content creators previewing blog posts 🚀 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+L) 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 SPECS • 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 📞 SUPPORT Need help? We're here for you! • FAQ: https://getmarkview.com/support • Email: support@getmarkview.com • GitHub: https://github.com/markview-app/support 🔗 LINKS • Website: https://getmarkview.com/ • Privacy Policy: https://getmarkview.com/privacy-policy • Terms: https://getmarkview.com/terms 🔐 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 • **Downloads**: Export markdown to HTML and DOCX files to your device • **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. --- 📥 Install MarkView now and transform how you read markdown files! Get started in seconds - click "Add to Chrome" to join thousands of developers, writers, and students enjoying beautiful, private markdown viewing.