MarkView: Markdown Viewer with Mermaid Diagrams, Math & Export

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

Navigate markdown files with folder browser and bookmarks. Export to Word, HTML, or PDF. View with Mermaid diagrams, KaTeX math, syntax highlighting, and smart TOC - all with 100% privacy (zero data collection). Works with local 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 - 14 themes: MarkView (Auto), GitHub, GitHub Dark, GitHub Dark Dimmed, Atom One Light, and more - 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, 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, and more - 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 🌐 UNIVERSAL MARKDOWN READER - WORKS EVERYWHERE - Local markdown files (file:///) - enable "Allow access to file URLs" in Chrome settings - GitHub raw files (raw.githubusercontent.com) - click "Raw" button on GitHub to use MarkView - GitLab raw files - compatible with GitLab raw markdown URLs - Bitbucket, Gitea raw files - works with raw file URLs from any Git platform - Any URL ending in .md, .markdown, .mkd, or .mdx served as plain text ⚠️ NOTE: MarkView renders RAW markdown files only. It won't activate on websites that already render markdown (GitHub blob pages, DeepWiki, ReadTheDocs, GitBook, etc.) - these sites have their own rendering! 🔒 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 (15 LANGUAGES) English, Deutsch, Español, Français, 日本語, and more 👥 PERFECT FOR - Developers reading and previewing README.md, CHANGELOG.md, API docs - Technical writers for documentation preview and live editing - 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 2. **Test online first** (recommended): - Visit: https://raw.githubusercontent.com/facebook/react/main/README.md - MarkView will automatically render it beautifully! 3. **Enable file access** (optional, for local files): - Open chrome://extensions/ - Find MarkView → Click "Details" - Toggle ON "Allow access to file URLs" 4. **Open local markdown files** - Drag and drop, File → Open, or click .md links 5. **Enjoy beautiful markdown** - Instant professional rendering! 💡 PRO TIPS - Use Ctrl+O (Cmd+O on Mac) to quickly open local markdown files - Press Ctrl+Shift+K to open the frequently used settings modal for quickly changing the experience of reading markdown documents - Toggle TOC sidebar (Ctrl+Shift+L) for documents with many headings - Enable auto-refresh while editing markdown to see live updates - Try different syntax highlighting themes to match your preference - 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 Whether you need a markdown viewer for development work, a reader for documentation and research, or a preview tool for content creation - MarkView delivers professional rendering with complete privacy protection. 📞 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.