Markdown Viewer - Clean Reader

Local Markdown reader: full GFM, Mermaid diagrams, math & syntax highlighting. Five themes, saved progress, multi-color highlights. No uploads—your data stays on device.

Markdown Viewer is a local-first Markdown reader. Open .md files from Files, iCloud Drive, AirDrop, or the system share sheet and get a clean, comfortable read-only preview instantly. No account required. No file uploads. Works offline. All reading data stays on your current device only.

Open files, start reading

• Open Markdown files from the app, system file picker, share sheet, or "Open With" file associations
• Supports .md, .markdown, .mdown, and plain text files
• Automatically tracks recently opened documents and reading progress so you can pick up where you left off

A comfortable reading experience

• Full GFM (GitHub Flavored Markdown) support: tables, task lists, blockquotes, code blocks
• Renders Mermaid flowcharts and sequence diagrams with touch panning and full-screen view
• Math rendering powered by KaTeX
• Syntax highlighting for code blocks; some blocks support one-tap export and share
• Tap images to enter a full-screen gallery with swipe and zoom

Efficient navigation and annotation

• Auto-generated table of contents from headings; collapsible sidebar navigation on iPad
• Full-text search grouped by section with one-tap jump
• Select text to add yellow, green, blue, or pink highlights — restored automatically when you reopen
• Reading position saved automatically when you close a document

Personalization

• Adjustable font size (70%–200%), line spacing, and paragraph spacing
• Five reading themes: horizon, autumn, canvas, twilight, slate
• Follow system / light / dark appearance
• Four content width options; optional keep-screen-on

Export and share

• Export as PDF (A4 layout) or original Markdown
• Send to other apps or save to Files via the system share sheet
• Built-in Share Extension — open from Mail, Safari, Files, and more with one tap

Privacy first

• No account, no telemetry, no file uploads
• Reading progress, highlights, and recent history stored locally only
• One-tap clear all local data without deleting your original files

Markdown Viewer — focused reading, nothing more.