Jayson vs MarkD

Jayson is a JSON viewer and editor for iPhone and iPad. Browse JSON as a structure, edit values, and save your changes back to the file. Whether you're inspecting an API response, checking a config file, or making a quick fix on the go, Jayson turns raw JSON into something you can actually read and change. BROWSE AND EDIT - Open JSON files stored on your device or in iCloud Drive. - Toggle between a structured table view and syntax highlighted text. - Add new values and keys, and save your changes back to the file. - Parse text or the contents of a URL from your clipboard into JSON. - Highlight a key from a child of an array to get a quick overview of your data. TABS, SPLITS, AND WINDOWS - Switch between files, or different objects in a single file, using tabs. - Compare JSON in a single file or across files using multiple splits. - Open multiple windows on the iPad. WORKS WITH SHORTCUTS Jayson integrates with Shortcuts, which comes in handy for debugging API calls, previewing JSON files, and building workflows around JSON. - Pass a response from Get Contents of URL to Jayson to see how it is structured. - Open JSON as a document you keep working on, or as a temporary preview. - Format JSON and hand the result to the next action, using spaces or tabs. FREE, WITH AN OPTIONAL UPGRADE Jayson's core functionality is free. Browsing, editing, saving, splits, Shortcuts, and working with up to two tabs at a time cost nothing. A one-time in-app purchase enables having more than two tabs open at once, switching between light and dark themes, and personalizing the app icon, accent color and type icons. One purchase, no subscription.

The Markdown reader for developers who think on the go. Open any .md file — README, design doc, API spec — and see it rendered in seconds. Code blocks highlighted in 40+ languages, Mermaid diagrams drawn automatically, HTML rendered cleanly. No setup, no clutter. iPhone in your pocket, ideas in your head. MarkD turns waiting time at the bus stop, the elevator, the coffee line into useful reading time. — Clean Markdown Rendering Headings (H1–H6), bold, italic, strikethrough, tables, blockquotes, links, images, ordered and unordered lists, checkboxes — all standard Markdown syntax fully supported. Both light and dark modes render with comfortable typography. Long documents scroll naturally in one continuous flow, with no screen transitions interrupting your reading. Code Syntax Highlighting Swift, Objective-C, Python, JavaScript, TypeScript, Go, Rust, Java, Kotlin, C, C++, C#, Ruby, PHP, Shell, SQL, HTML, CSS, JSON, YAML, and 40+ more languages are supported. Code blocks are highlighted with language-appropriate colors so structure is clear at a glance. Dark mode applies a low-fatigue color theme automatically. Mermaid Diagrams Mermaid code blocks inside Markdown are automatically detected and rendered as visual diagrams. Flowcharts, sequence diagrams, class diagrams, state diagrams, ER diagrams, and Gantt charts are all supported. Especially useful when reading system design documents, API flow docs, or database schemas. Folders & Tags Organize saved documents into folders and attach tags for easy retrieval. Filter by file type (Markdown, HTML, Swift, Python, JSON, and more) or search by title to instantly find any file. Use favorites to keep frequently viewed documents close at hand. Wide File Format Support Beyond .md and .markdown, MarkD opens .html, .swift, .py, .js, .ts, .go, .rs, .java, .kt, .c, .cpp, .cs, .json, .yaml, .yml, .txt, .sh, .rb, and virtually every text-based file format developers work with daily. Both the file extension and content are analyzed to automatically select the best rendering method. Files App Integration Long-press any file in the iOS Files app, choose "Open in MarkD," and it's imported instantly. Works with iCloud Drive, local storage, and third-party cloud storage. Duplicate files are never saved, keeping your library clean. Share Extension Share text or a URL from Safari, Notes, Slack, or any other app using the share sheet, and it's saved directly to your MarkD library. No need to open the app first — save as you read, in one natural motion. You can also share saved documents directly to other apps. Reading Info & HTML Support Word count and estimated reading time are automatically calculated when you open a document. HTML files are rendered in a built-in web view, with dark mode meta tags injected automatically. — Built for - Developers who frequently read READMEs and open source documentation - Engineers who want to view Markdown files from GitHub or GitLab on mobile - Writers who draft technical blog posts in Markdown and want to preview them - Team members who reference wikis, API docs, and design documents on the go - Anyone who wants to read documents containing code in a clean, focused environment MarkD is focused purely on reading documents well — no unnecessary features, no clutter. Experience the simplicity of opening it for the first time, and the satisfaction of a well-organized library as it grows.