OnePreview vs Markdown Viewer Editor

Open Markdown and developer files in OnePreview on iPhone and iPad. OnePreview renders GitHub-style Markdown, MDX, TextBundle and TextPack packages, JSON, JSONL, YAML, XML, CSV, TSV, TOML, ENV, SQLite databases, source code, plain text, logs, and ZIP and TAR.GZ archives. In Files, long-press a supported document, choose Open With, then select OnePreview. A normal tap may use Apple's built-in preview for common file types. Inside OnePreview, switch between rendered Markdown and source, view Mermaid diagrams and KaTeX math with bundled assets, inspect structured data and SQLite schemas, and check archive contents before extracting. Built for developer workflows, AI-generated files, documentation review, and everyday file browsing. Processing is fast, local-first, and does not require an account.

Markdown Viewer Editor is a powerful Markdown editor inspired by Typora. It offers a seamless writing experience across iPhone, iPad, and Mac with four flexible editing modes — WYSIWYG, Source, Preview, and Split View. FOUR EDITING MODES • WYSIWYG — Rich-text editing that renders Markdown as you type, just like Typora • Source Mode — Raw Markdown editing with line numbers and synchronized scrolling • Live Preview — High-quality rendered preview with full Markdown support • Split View — Source code and preview side by side for instant feedback FULL MARKDOWN & BEYOND • Complete Markdown syntax: headings, lists, tables, code blocks with syntax highlighting, links, images, and more • KaTeX math equations — inline ($...$) and block ($$...$$) formulas • Mermaid diagrams — flowcharts, sequence diagrams, Gantt charts • GitHub Alerts, footnotes, YAML front matter, [TOC] generation • Highlight (==text==), superscript (^text^), subscript (~text~) • HTML tags: iframe, video, audio, details, kbd, mark, and more WRITING FOCUS • Focus Mode — dims non-active lines so you can concentrate on your writing • Typewriter Mode — keeps the current line centered on screen • Full-screen mode for distraction-free writing • Auto-pairing for brackets, quotes, and Markdown markers AI-POWERED WRITING ASSISTANT • Continue writing, summarize, translate, polish, or explain selected text • Custom prompts for any AI instruction • Real-time streaming output POWERFUL FILE MANAGEMENT • Folder browser with recursive directory tree • Multi-tab editing — work on several documents at once • Quick Open (Ctrl+P / Cmd+P) — fuzzy search across your workspace • Auto-save with 3-second debounce • Draft recovery after unexpected crashes • Recent files on the welcome screen IMAGE HANDLING • Paste images from clipboard — auto-saved and inserted as Markdown reference • Drag & drop image insertion • Configurable image storage directory and path mode (relative / absolute) • Image upload to image hosting via PicGo or custom shell command FIND & REPLACE • Find and replace with regex and case-sensitivity options • Search across all open documents EXPORT & IMPORT • Export to PDF, HTML (GitHub-styled), Word (.docx), LaTeX (.tex), EPUB, and PNG long image • Import from Word (.docx) to Markdown • Custom export commands with {input}/{output} placeholders • Mermaid diagram export to PNG VERSION CONTROL & CLOUD SYNC • Git commit history viewer for each file • Auto Git sync — commit, pull --rebase, and push on save • Real-time sync status in the status bar • External file change detection with reload prompt THEMES & CUSTOMIZATION • 12 built-in themes — 6 light + 6 dark (GitHub, Dracula, Monokai, Nord, Tokyo Night, and more) • Dark / Light mode — follow system or toggle manually • Custom CSS themes for preview styling • Adjustable font size and zoom level • Customizable keyboard shortcuts with visual editor OUTLINE & STATUS BAR • Document outline panel — auto-extracted heading structure with click-to-navigate • Status bar — line/column position, word count, character count, line count PLUGIN SYSTEM • Shell script preprocessors — configure a plugin directory and run .sh/.py/.js pipelines LOCALIZATION • English and more interface — switch in settings