OnePreview vs Quick Markdown Viewer

Preview Markdown, source code, structured data and archives on iPhone and iPad. OnePreview is a local-first file viewer with no account required. READ MARKDOWN, DIAGRAMS AND MATH View GitHub-style Markdown with tables, task lists and highlighted code. Switch between rendered content and source. Mermaid diagrams and KaTeX formulas use bundled rendering assets. EXPORT MARKDOWN TO PDF Open a standard Markdown file (.md or .markdown) in OnePreview to create an A4 PDF report. Check the actual PDF preview, with continued table headers, wrapped code, Mermaid diagrams and KaTeX formulas, then save it using the system file interface. Document content is processed on your device. INSPECT DATA, CODE AND ARCHIVES Read structured data and source code, inspect SQLite schemas and sample rows without editing the database, and see the folder hierarchy inside ZIP and TAR.GZ archives before extracting. SUPPORTED FORMATS Markdown (.md, .markdown), MDX, TextBundle, TextPack, JSON, JSONL, YAML, XML, CSV, TSV, TOML, ENV, INI, properties, Apple property lists (plist), SQLite (.sqlite, .sqlite3, .db), source code, plain text, logs, ZIP, TAR.GZ and TGZ. Syntax highlighting supports languages including Swift, Python, JavaScript, TypeScript, Java, C/C++, Objective-C, Ruby, Rust and Shell. OPEN YOUR FILES Tap Open File in OnePreview, or long-press a supported document in Files, choose Open With, then select OnePreview. A normal tap in Files may use Apple's built-in preview; OnePreview does not replace every system preview on iPhone or iPad. Try the sample folder from the home screen to explore supported formats.

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