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 or HTML. Print to PDF with optimized layouts. 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 ⚡ PRODUCTIVITY & UNIQUE FEATURES - Export to DOCX and HTML with perfect formatting preservation - Print to PDF - clean, optimized layout without UI chrome, via browser print - Folder Browser - navigate your entire project structure without leaving the tab - Folder Bookmarks - save and instantly access frequently used directories - Live auto-refresh when files change - perfect for external editor + live preview workflows - Recent Documents tracking - quickly reopen recently viewed files from the popup - Word Count & Reading Time - live statistics as you read: words, characters, estimated time - Reading Progress Bar - visual indicator showing your position in long documents - Raw view toggle - instantly switch between rendered and source view - Table of Contents (TOC) with smooth scrolling for long documents 📝 PROFESSIONAL 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 - Emoji support 🚀 ✨ - Professional image viewer - lightbox with gallery navigation, zoom, pan, and intelligent lazy loading - External link indicators - visual previews and icons for outbound links 💻 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 - Ideal for README files, API docs, and technical documentation 📊 DIAGRAMS & MATH - Mermaid diagrams: flowcharts, sequence, ER, state diagrams, Git graphs, and more - Download diagrams as SVG, PNG, or JPEG - Interactive zoom and pan controls - KaTeX math equations - inline and display mode - Full support for complex mathematical notation 🎨 THEMES & CUSTOMIZATION - Dark and light themes with automatic system detection - 9 font options: Inter, Merriweather, 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 🌐 UNIVERSAL MARKDOWN READER - WORKS EVERYWHERE - Local files (file:///) - enable "Allow access to file URLs" in Chrome settings - GitHub raw files (raw.githubusercontent.com) - GitLab, Bitbucket, Gitea raw file URLs - Any URL ending in .md, .markdown, .mkd, or .mdx served as plain text ⚠️ NOTE: MarkView renders RAW files only. It won't activate on sites that already render markdown (GitHub blob pages, ReadTheDocs, GitBook, etc.) - those have their own rendering. 🔒 100% PRIVACY-FOCUSED - Zero data collection - no personal information collected, ever - No analytics, no tracking, no telemetry, no cloud services - All processing happens locally in your browser - Your files never leave your device - Settings stored locally using Chrome's storage API - Built on trusted, audited open-source libraries: markdown-it, highlight.js, KaTeX, Mermaid 🌍 MULTILINGUAL - 15 LANGUAGES English, Deutsch, Español, Français, 日本語, and more 👥 PERFECT FOR - Developers previewing README, CHANGELOG, and API documentation - Technical writers using MarkView alongside their editor for live preview - Students and researchers reading notes with math equations and diagrams - Data scientists reviewing Jupyter markdown cells - Content creators and writers previewing blog posts, wikis, and documentation drafts 🚀 QUICK START 1. Install MarkView - click "Add to Chrome" 2. Test instantly: visit https://raw.githubusercontent.com/facebook/react/main/README.md 3. For local files: go to chrome://extensions → MarkView → Details → enable "Allow access to file URLs" 4. Open any .md file - drag & drop, File → Open, or click a link 📞 SUPPORT - 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 🔐 PERMISSIONS - Storage: Save theme, font, and layout preferences locally - ActiveTab: Read file content from the current tab for rendering - Downloads: Export to HTML and DOCX files - File URLs: Access local .md files (disabled by default) - Host Permissions: Render files from GitHub, GitLab, and documentation sites All processing is local. No data is ever sent to external servers.