Support

How do I preview a Markdown file?

Simply navigate to any .md file URL in Chrome (GitHub raw files, local files, or hosted files). The extension automatically detects Markdown content and renders it with rich formatting. You can also click the extension icon and choose “Open Local File” to preview files from your computer.

How do I enable local file access?

To preview local file:// URLs:

1. Go to chrome://extensions
2. Find “RAMSIO Markdown Viewer”
3. Click “Details”
4. Enable “Allow access to file URLs”

Does the extension collect any data?

No. The extension collects zero data. All Markdown processing happens locally in your browser. No file content, browsing data, or personal information is ever transmitted. See our Privacy Policy for details.

What Markdown features are supported?

The extension supports a comprehensive set of Markdown features:

• Standard Markdown: Headings, bold, italic, links, images, lists, blockquotes, code blocks, tables, horizontal rules
• Math Equations: LaTeX math via KaTeX ($inline$ and $$block$$)
• Diagrams: Mermaid.js (flowcharts, sequence diagrams, class diagrams, and more)
• Code Highlighting: Syntax highlighting for code blocks via Prism.js

Can I export my documents?

Yes. The extension supports exporting to:

• PDF — High-quality PDF export with formatting preserved
• HTML — Self-contained HTML file with embedded styles

Use the toolbar buttons or keyboard shortcuts to export.

Why isn’t my Markdown rendering correctly?

Common causes:

• The file URL doesn’t end in .md — The extension detects files by their URL extension. Ensure the URL ends with .md.
• The page has a Content Security Policy — Some websites restrict extensions from modifying page content.
• Math or Mermaid is disabled — Check the extension settings to ensure these features are enabled.