JingMark — Clean Markdown Viewer & Editor

Read and write Markdown files locally with beautiful themes, math/diagram rendering, and seamless export.

JingMark is the ultimate local Markdown reader and live editor for Chrome. Transform raw `.md` files on your computer into clean, beautifully formatted documents the moment you open them. No servers, no account required, and no cloud uploads — your notes stay 100% private and offline on your local machine. Whether you need a fast README viewer, a clean document renderer with KaTeX math and Mermaid diagrams, or a powerful Markdown publishing tool for WeChat and Word, JingMark is built for developers, writers, and researchers. KEY FEATURES 1. Fast Local Markdown Viewer (100% Free) • Open & Preview `.md`, `.markdown`, README, and changelog files directly in browser tab • 100% Offline support — select a folder once to browse all your Markdown notes • Lightning-fast rendering — Web Worker engine opens 500KB+ and 1MB+ large files without UI freezing • 6 Free handcrafted themes with full Dark Mode & Split View preview • Native rendering for KaTeX math formulas, equations, and Mermaid diagrams/flowcharts • Table of contents (Outline panel), typewriter mode, and mobile preview 2. Live Markdown Editor & Publisher (Pro) • True WYSIWYG local Markdown editor with instant auto-save back to your file system • 46 Editorial themes — warm paper styles, minimal layouts, dark mode, and code-highlighting themes • One-click Export to PDF, HTML, native Word (.docx), and Markdown • Copy with inline styles — paste rich-text layout directly into Notion, Word, or WeChat without broken formatting • WeChat Official Account Publishing — push drafts straight to your WeChat account in one click • Global batch search and replace across documents WHY CHOOSE JINGMARK? • Privacy First: All rendering and editing happen locally in your Chrome browser. Zero ads, zero tracking, zero content collection. • One-Time Purchase: Pro upgrade is a single one-time payment. Lifetime access, no annoying monthly subscriptions. QUICK 30-SECOND SETUP To read local files, Chrome requires a manual permission toggle: 1. Open chrome://extensions 2. Locate JingMark 3. Enable "Allow access to file URLs" Read, edit, and publish Markdown files right where they live — faster and easier than ever.