Quick Markdown Viewer

Quick Markdown Viewer is a local-first reader for Markdown folders, documentation packets, CSV/TSV tables, and media-rich notes on Mac, iPhone, and iPad.

Open a folder of files you already have, or open a public GitHub repository URL when you need to inspect remote docs. The app keeps reading fast and direct: no account, no subscription, no in-app purchase, and no tracking layer.

Features:

- Open local folders and browse Markdown, CSV, and TSV files in a file sidebar
- Open JSON, JSONC, NDJSON, and JSONL files with collapsible structured rows
- Read JSON-family fenced code blocks inside Markdown without switching apps
- Expand and collapse folders, filter large file trees, and use keyboard navigation on macOS
- Search the current document with Command-F or all open documents with Command-Shift-F
- Click search results in the sidebar to jump to matches highlighted in the document
- Read Markdown with native rendering for headings, lists, tables, code blocks, links, images, GIFs, and local video
- Render Mermaid diagrams natively, then zoom and pan diagram previews
- Detach Mermaid diagram previews into resizable macOS windows
- Open a document outline, jump to headings, and track the current section while reading
- Open CSV and TSV files as native tables with controls for wrapping and sizing
- Preview linked media without converting your Markdown files
- Print the current document or assemble a cancellable background Print All packet
- Preview Markdown from Finder with the macOS Quick Look extension
- Install the optional `qmv` command-line launcher on macOS and open supported files directly from Terminal
- Open public GitHub repository and repository tree URLs, including branch and tag paths
- Hide dependency and vendor folders with editable ignore patterns per window
- Navigate between files with back and forward history
- Adjust viewer font size for comfortable reading

Quick Markdown Viewer is designed to stay lightweight and direct:

- no account required
- no subscription
- no in-app purchase
- no tracking
- no web view renderer