RAMSIO Markdown Viewer

About

RAMSIO Markdown Viewer — the fastest way to preview Markdown files from GitHub, GitLab, Bitbucket, and your local computer with beautiful rendering. Works offline.

✦ WHAT IT DOES
  One-click preview for any .md file on GitHub, GitLab, or Bitbucket. Click "Preview with RAMSIO" on any repository markdown file. Open local .md files from your computer — works fully offline without internet. Raw markdown pages on raw.githubusercontent.com are automatically detected with a preview bar.

✦ KEY FEATURES
  • Offline Local File Support — open and preview .md files from your computer, no internet needed
  • 3 Professional Themes — GitHub Light, Professional, and Minimal
  • Export to PDF & HTML — save rendered documents for sharing or printing
  • Document Outline — navigate headings with a collapsible sidebar
  • Document Statistics — word count, character count, reading time
  • Mermaid Diagrams — flowcharts, sequence diagrams, class diagrams, pie charts, and more
  • Math Equations — LaTeX rendering with KaTeX ($inline$ and $$block$$ notation)
  • Syntax Highlighting — 50+ programming languages with Prism.js
  • Zoom Controls — 75% to 200% zoom range
  • Dark & Light Mode — follows your system preference or set manually
  • Keyboard Shortcuts — Ctrl+Shift+M to open, full shortcut reference inside
  • Drag & Drop — drop any .md file onto the popup to preview instantly
  • Right-Click Menu — "Preview Markdown" context menu on any markdown link
  • Print-Friendly — clean white background for printing

✦ SUPPORTED PLATFORMS
  • GitHub — repository files, gists, raw.githubusercontent.com
  • GitLab — repository files, raw file URLs
  • Bitbucket — repository files
  • Local Files — open any .md/.markdown/.txt file from your computer (works offline)

✦ PRIVACY & SECURITY
  • Zero data collection — no analytics, no tracking, no telemetry
  • All processing happens locally in your browser
  • No external servers contacted (only fetches raw markdown from GitHub/GitLab/Bitbucket)
  • Open permissions model — downloads and notifications are optional (granted only when you use export or updates)
  • Strong Content Security Policy — no eval(), no external scripts

✦ HOW TO USE
  1. Install the extension
  2. Accept the EULA on first run
  3. Visit any .md file on GitHub, GitLab, or Bitbucket
  4. Click the "Preview with RAMSIO" button that appears in the file toolbar
  5. Or click the extension icon and use "Open File" to load local .md files
  6. Or drag & drop any .md file onto the popup

✦ KEYBOARD SHORTCUTS
  • Ctrl+Shift+M — Open extension popup
  • Ctrl+Shift+P — Preview current markdown file
  • F9 — Toggle document outline
  • F10 — Toggle document statistics

✦ EXPORT OPTIONS
  • PDF — professional quality with page headers and formatting
  • HTML — self-contained file with embedded styles
  • Copy — copy rendered HTML to clipboard

✦ FREE FOREVER
  RAMSIO Markdown Viewer is completely free with no premium tiers, no ads, and no usage limits.

Made by RAMSIO Digital — https://www.ramsio.tools
Support: [email protected]