MarkVision

Tracking since May 2, 2026.

Changelog

• Jun 7, 2026
  description

  Beautiful Markdown rendering — auto-render any .md URL, live split-pane editor, diagrams, math, syntax highlighting & more.
  
  ## Description
  MarkVision transforms any Markdown (.md / .markdown) URL into a beautifully styled document — automatically, with no click needed.
  
  Whether you're reading raw GitHub files, local documentation, or your own notes, MarkVision renders them instantly with proper headings, tables, code blocks, and more.
  
  ## Feature Highlights
  • Auto-render any .md URL — GitHub, GitLab, local files
  • Real-time split-pane Markdown editor
  • Code syntax highlighting (190+ languages via highlight.js)
  • Math equations via KaTeX ($...$ and $$...$$)
  • Mermaid + Graphviz + PlantUML diagram support
  • Auto-generated TOC with scroll sync
  • Image lightbox with zoom
  • GitHub / Dark / Academic themes
  • Document manager with auto-save
  • 100% local — no account, no tracking
  
  ## Installation
  
  **Chrome Web Store（推荐）**
  
  1. 在 Chrome 应用商店搜索 **MarkVision**，点击「添加至 Chrome」
  2. 安装完成后，浏览器工具栏出现 MarkVision 图标
  3. 打开任意 `.md` 链接（如 GitHub raw 文件），页面将自动渲染
  
  ## Notice
  This extension requires <all_urls> host permission to detect and auto-render .md / .markdown URLs on any domain (GitHub, GitLab, local files, etc.). The file:/// permission is required to render local Markdown files.
  
  The manifest CSP contains 'wasm-unsafe-eval' which is used exclusively by Viz.js (Graphviz renderer) to execute its WebAssembly engine client-side. No external WASM is loaded.
  
  The only external network request is to plantuml.com, used solely to render PlantUML diagram source blocks into SVG images. No user data is transmitted.

  MarkVision transforms any Markdown (.md / .markdown) URL into a beautifully styled document — automatically, with no click needed.
  
  Whether you're reading raw GitHub files, local documentation, or your own notes, MarkVision renders them instantly with proper headings, tables, code blocks, and more.
  
  ✨ KEY FEATURES
  
  📄 Auto-Render
  Navigate to any .md or .markdown URL and MarkVision immediately renders it as a styled page. Works on GitHub raw files, GitLab, Gitea, local file:// URLs, and any other markdown URL.
  
  ✏️ Live Split-Pane Editor
  A full Markdown editor opens in a new tab with a real-time preview pane. Write on the left, see the result on the right — instantly.
  
  💡 Syntax Highlighting
  190+ programming languages highlighted via highlight.js — your code blocks look great every time.
  
  ∑ Math Equations (KaTeX)
  Render inline math $...$  and display math $$...$$ equations with beautiful LaTeX-quality output.
  
  📊 Mermaid Diagrams
  Flowcharts, sequence diagrams, Gantt charts, state diagrams, and more — rendered inline from fenced code blocks.
  
  🕸 Graphviz (DOT)
  Client-side graph rendering via Viz.js — no external service required.
  
  🌿 PlantUML
  UML diagrams rendered via plantuml.com — class diagrams, activity diagrams, use cases, and more.
  
  📚 Table of Contents
  Auto-generated TOC from your headings, with scroll-sync highlight to show your current position.
  
  🖼 Image Lightbox
  Click any image to zoom in. Scroll the mouse wheel to scale. Click outside to close.
  
  🎨 3 Themes
  Choose between GitHub, Dark, and Academic themes. Your preference is remembered per context.
  
  💾 Auto-Save & Document Manager
  Editor content is auto-saved locally. Your documents are stored in browser storage — nothing leaves your device (except PlantUML diagrams rendered via plantuml.com).
  
  🔒 PRIVACY
  MarkVision stores all data in your local browser storage only. No telemetry, no analytics, no accounts required. The only external network request is PlantUML diagram rendering via plantuml.com.

Permissions & access

Permissions

storageactiveTabscriptingdeclarativeNetRequestdownloadsdownloads.opencontextMenus

Host access

<all_urls>, file:///*

Screenshots