Markdown Reader

Fast, private and offline Markdown viewer with Mermaid diagrams, MathJax math, syntax highlighting and dark mode.

Markdown Reader turns raw Markdown files opened in Chrome into beautifully formatted, readable, and interactive documents. Whether you view local `.md` files or documents on web servers and localhost, Markdown Reader renders them instantly with zero lag and total privacy. 100% OFFLINE & PRIVACY-FOCUSED • Zero external network requests: no CDNs, no tracking, no telemetry, no analytics. • All libraries, fonts, and stylesheets are bundled directly inside the extension. • Your browsing history and document contents never leave your device. FULL GITHUB FLAVORED MARKDOWN (GFM) & EXTENSIONS • Standard CommonMark and full GitHub Flavored Markdown (tables, task lists, autolinks, strikethrough). • Configurable Markdown extensions: footnotes, definition lists, abbreviations, mark/highlight, inserted text, subscript, superscript, custom attributes, and CJK support. • Frontmatter support: seamlessly extracts and formats YAML and TOML metadata. INTERACTIVE DIAGRAMS (MERMAID.JS) • Automatic rendering of flowcharts, sequence diagrams, state diagrams, class diagrams, and pie charts. • Built-in pan and zoom controls via Panzoom (Shift + mouse wheel) for navigating complex architectures. ACCURATE MATHEMATICAL FORMULAS (MATHJAX V3) • TeX/LaTeX formulas rendered with clean, scalable CHTML output. • Supports inline ($...$, \(...\)) and block ($$...$$, \[...\], \begin{...}) mathematics. • 33 local TeX packages (e.g., mhchem, physics, cancel, boldsymbol) loaded on-demand from local storage. CODE SYNTAX HIGHLIGHTING (PRISM.JS) • Automatic syntax highlighting supporting ~300 programming languages. • On-demand local language loading keeps memory usage minimal. • One-click copy button for every code block. 30 CURATED THEMES & DARK MODE • 30 typography themes included (GitHub Light/Dark, Sakura, Mini, Water, Modest, LaTeX, Bamboo, and more). • Automatic theme detection following your operating system's light/dark mode preference. • Customizable typography, font stack, and custom CSS injection. POWERFUL PRODUCTIVITY FEATURES • Instant Raw / Formatted Toggle: Press Alt + M or click the popup button to switch between rendered view and syntax-highlighted raw Markdown. • Collapsible Table of Contents (TOC) with deep anchor linking. • Local File Auto-Reload: Automatically updates the page when the local Markdown file is edited and saved on your computer. • Multilingual Interface: Fully translated into English, Italian, French, German, Spanish, and Portuguese. ---------------------------------------------------------------- HOW TO ENABLE LOCAL FILE VIEWING (`file:///`) ---------------------------------------------------------------- Due to Chrome security rules, access to local files must be manually enabled: 1. Open Chrome and navigate to: chrome://extensions 2. Find "Markdown Reader" and click "Details". 3. Turn ON the toggle: "Allow access to file URLs". 4. Drag and drop any `.md` file into Chrome to view it instantly!