MDViewer — Quick Markdown

View Markdown, JSON & YAML on iPhone. Math formulas, Mermaid diagrams, syntax highlighting — all offline.

MDViewer — Fast Markdown Viewer for iPhone & iPad

Open Markdown (.md), Mermaid and JSON files instantly with a fast, native iOS app.

MDViewer is a lightweight Markdown Viewer and Markdown Reader designed for developers, technical writers, students and anyone working with Markdown documents on the go. Preview Markdown files with GitHub Flavored Markdown support, render Mermaid diagrams, view JSON files, and export to PDF — all from your iPhone or iPad.

------ KEY FEATURES ------

Markdown Viewer & Reader

• Open and preview Markdown (.md) files instantly • Full GitHub Flavored Markdown (GFM) support • Tables, task lists, code blocks, images, links and more • Fast native rendering optimized for iOS

Syntax Highlighting

• 180+ programming languages with automatic detection • Clean, readable code blocks with color themes

Mermaid Diagrams

• Render Mermaid diagrams inline: flowcharts, sequence diagrams, Gantt charts and more • Tap to zoom and explore complex diagrams • Full Mermaid.js support

Math Formulas (KaTeX)

• Render LaTeX math formulas with KaTeX • Inline and display math support • Perfect for academic and scientific documents

JSON Viewer

• Interactive collapsible JSON tree view • Syntax highlighted JSON with formatting • Expand and collapse nested objects and arrays

Additional Features

• PDF export — share documents as beautifully formatted PDFs • Table of Contents — navigate long documents easily • Find in document — search text with match highlighting • YAML and plain text viewing • Dark and Light mode support • Works offline — no internet connection required • Universal app — optimized for iPhone and iPad

------ WHO IS IT FOR ------

• Developers previewing README files, documentation and code notes • Technical writers reviewing Markdown documents on the go • Students reading LaTeX-formatted notes and papers • Anyone who needs a fast, reliable Markdown viewer on iOS

MDViewer reads your files locally. No cloud, no account, no tracking. Your documents stay on your device.

Download MDViewer and start viewing Markdown files on your iPhone and iPad today.