OnePreview vs md.too

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.

Application md.too is a minimalist markdown viewer for iPhone and iPad. It opens .md files, renders them, and lets you read and copy. That is the whole product. What it renders: • Headings, lists (including GitHub-style task lists with [ ] / [x]), block quotes, thematic breaks, and inline emphasis (bold, italic, strikethrough, underline). • Code blocks with syntax highlighting for about 40 languages: Swift, C/C++/C#/Objective-C, Java, Kotlin, Scala, JavaScript, TypeScript, Python, Rust, Go, Ruby, PHP, Dart, Lua, Perl, R, Julia, Haskell, OCaml, F#, Elixir, Clojure, Groovy, SQL, GraphQL, Dockerfile, Makefile, TOML, INI, YAML, JSON, XML, HTML, CSS, Bash, PowerShell, Markdown. • Tables, including inline images inside table cells. • Inline images loaded from any HTTPS URL, with explicit width/height attributes (GitLab-style {width=N height=N}). • A small but useful LaTeX subset in $…$ and $$…$$: Greek letters, super- and sub-scripts, common operators, simple fractions, and basic display math. • Selectable, copyable text. Code blocks and tables get a one-click copy button. • Light and dark theme — follows the system, or pick one explicitly. • Export the rendered document to a paginated PDF, with images embedded. What it deliberately does not do: • No editor, no live preview/edit split, no autosave. Read-only by design. • No HTML rendering or WKWebView. Pure native UIKit/SwiftUI. • No file tree, no tabs, no command palette. • No third-party packages. The most popular JavaScript Markdown library, marked, lists about 636 transitive dependencies and roughly 38,980 lines of code on its public dependency graph. md.too ships zero dependencies. Every package you do not pull in is a supply-chain risk you do not inherit. Privacy: The application does not collect or transmit any personal data. The only network traffic is fetching inline images you reference by URL. Source code: The project is open-source under the MIT license. See the support URL.