GGitHubAdd Tinta - fast, lightweight markdown viewer for Windows (#191)

Awesome Markdown Editors & (Pre)viewers - What's News (Upcoming) in 2026?

A collection of awesome markdown editors and (pre)viewers for Linux, Apple OS X, Microsoft Windows, the World Wide Web and more.

Markdown Online Editors

markupmarkdown (web: mumd.metavert.io, open source @ github jonradoff/markupmarkdown) - "Google Docs for Markdown" — collaborative editor and review tool for Markdown files: anchored comment threads on any text selection, suggested changes with one-click apply, review states (approve / request changes), document checks, and GitHub round-trip (open any repo's .md, edit, push back as a PR). Includes an MCP server so AI agents can comment, suggest, and review through the same loop as humans. MIT licensed, built with Go + React.

MDXG Redline (web: mkdn.review, open source @ github oubakiou/mdxg-redline) - Read-only Markdown (pre)viewer with inline review comments, distributed as a single standalone HTML file (also runnable via npx mdxg-redline). Implements the MDXG Viewer profile: Word/Pages-style stacked virtual pages, page navigation and outline, in-document search, and left-hand WASD keyboard navigation. Renders Shiki syntax highlighting (~235 languages), Mermaid diagrams, KaTeX math, and GitHub Flavored Markdown footnotes, with smartphone support. Select any text range to leave a comment; comments export as structured JSON keyed by headingPath and sourceLine, so an LLM agent can apply each one back to the exact lines. The standalone/CLI build makes no network requests (CSP connect-src 'none'); an optional online edition at mkdn.review fetches Markdown from an allowlisted public raw URL via a ?url= parameter. MIT licensed.

Markdown Desktop Editors

Editor Plugins

Markdown Table Editor (web: markdowntableeditor.krot.name, JetBrains Marketplace: Markdown Table Editor, open source @ github krotname/IdeaMarkdownTableEditor, krotname/NppMarkdownTableEditor) - Open-source plugins for editing Markdown pipe tables inside JetBrains IDEs and Notepad++. Features include table alignment, row and column operations, sorting, width fitting, CSV/TSV conversion, escaped pipe handling, Unicode/CJK width support, release ZIPs, tests, and CI.

Universal

Binderus (web: binderus.com, open source frontend @ github binderus/binderus) - Local-first note-taking app with Notion-style WYSIWYG editing for plain text and Markdown files, Obsidian-style philosophy for local files, a plugin system with AI/LLM plugin, custom themes, and optional encrypted vaults. No cloud, no account, no subscription. ~9 MB, built with Tauri + Rust, works on Windows, Mac, and Linux.

Glyph (open source @ github hamidfzm/glyph) - Cross-platform native Markdown viewer and editor built with Tauri 2 (Rust + React 19). Features GitHub Flavored Markdown, KaTeX math, Mermaid diagrams, wikilinks with backlinks, multi-file tabs, 6 syntax themes, AI summarization (Claude/OpenAI/Ollama), text-to-speech, and platform-native styling. Offline-first, MIT licensed. Works on macOS, Windows, and Linux.

**Huiyu MD (open source @ github huiyu9144/Huiyu-MD) - Minimal, lightning-fast Markdown reader for Windows & macOS. Built with Tauri 2.0 (Rust + React). Features dark/light themes with auto-persist, Ctrl+scroll zoom (25%-400%), KaTeX math formula rendering, code blocks with syntax highlighting and one-click copy, drag & drop file opening, auto file association, and a right-click context menu. Only ~5 MB, starts instantly (< 0.3s), zero white flash. macOS builds are code-signed and notarized by Apple.

Markra (web: editor.markra.app, open source @ github murongg/markra) - Local-first WYSIWYG Markdown editor for plain .md files with source mode, AI edit preview, multi-provider AI settings, and cross-platform Tauri desktop builds. AGPL-3.0 licensed.

MDHero** (web: mdhero.app), open source @ github vaibhavuk-dev/mdhero) - Reading-first native Markdown viewer for macOS and Windows with a lightweight editor mode. Built with Tauri 2 + SvelteKit, ~8 MB — vs. 100-200 MB for Electron-based alternatives. Renders KaTeX math, Mermaid diagrams, and syntax-highlighted code via highlight.js (~25 languages). Features tab-based navigation with persisted edit state, table-of-contents sidebar, pinned project folders, Vim keybindings (j/k/gg/G), source-line scroll sync between viewer/raw/editor modes, Open URL fetcher for GitHub/GitLab/Bitbucket files, an LLM paste mode that auto-unescapes \n and \" from ChatGPT/Claude output, and an optional Close-on-Escape mode for file-manager viewer usage. Press Cmd+E to edit, Cmd+S to save. MIT licensed. No user tracking — anonymous update checks send only OS family and version.

MD Preview (web: vorojar.github.io/md-preview, open source @ github vorojar/md-preview) - Ultra-lightweight cross-platform Markdown preview app built with Rust and the system WebView. Preview-first, no Electron or bundled browser, with GitHub Flavored Markdown, syntax highlighting, KaTeX math, Mermaid diagrams, dark mode, print support, live reload, and a small inline edit mode for quick fixes. Ships signed and notarized macOS DMG plus Windows and Linux builds.

Noteriv (web: noteriv.com, open source @ github thejacedev/Noteriv) - Local-first Markdown note-taking app built with Tauri 2 (Rust + Next.js). Organizes .md files into vaults with wiki-links, backlinks, a force-directed graph view, kanban board, daily notes, full-text search, KaTeX math, Mermaid diagrams, and a [TOC] widget. Extensible via a plugin API and custom CSS themes, with Git and WebDAV sync. Cross-platform (Linux, macOS, Windows), MIT licensed.

Linux

qnote (open source @ github Omibranch/qnote) - Minimal frameless notepad for Linux built with Tauri 2 (Rust + TypeScript). Features Markdown editing with live preview, real PDF export via Typst, OCR via Tesseract, automatic version history with snapshots, dark/light themes, and custom fonts. Available on AUR.

Microsoft Windows

Markdown Studio (open source @ github Financialnews-ops/markdown-studio-by-htny) - Desktop Markdown editor for Windows with live preview and independently toggleable editor/preview panes. Built with Electron, parsing via marked and HTML sanitized with DOMPurify. Includes a formatting toolbar (headings, bold, italic, strikethrough, inline code, quotes, ordered/unordered lists, links, images, tables) and one-click export to PDF, DOCX (Word), and Obsidian-flavored Markdown, plus PDF text import. Fully offline — documents stay in a local Documents/MarkdownStudio folder. Ships an NSIS installer via signed-tag GitHub Releases. MIT licensed.

Tinta (web: tinta.cc, open source @ github oipoistar/tinta) - Fast, lightweight Markdown viewer and reader for Windows built with native C++ and Direct2D/DirectWrite for hardware-accelerated text rendering -- a single portable exe under 1 MB that cold-starts in ~200 ms, no Electron, no bundled browser, no installer. Designed as the double-click default for .md files: 10 themes (5 light, 5 dark incl. an OLED-friendly pure black), table of contents, folder browser, full-text search, rich tables, text selection, Ctrl+scroll zoom, drag & drop, and an edit mode with live preview. Installable via Scoop. MIT licensed.

Apple Mac OS X

Sly (open source @ github waynevernon/sly) - Markdown notes and tasks for macOS. Sly turns a folder of Markdown files into a keyboard-friendly writing and planning workspace with a rich text editor, Markdown source mode, task views, fast search, wikilinks, Mermaid diagrams, KaTeX math, Git support, optional AI helpers, and a CLI for terminal workflows.

Glance (web: technol.io/en/glance, open source @ github baladi39/glance) - Native macOS Markdown viewer built with Tauri 2 (Rust + TypeScript). View-only — no editing, no cloud, no accounts. Features syntax highlighting via Shiki (100+ languages), mermaid diagram rendering, auto-generated table of contents, GFM task lists, file watching with auto-reload and change highlighting, and drag-and-drop file opening. Privacy-first: remote images blocked by default, zero telemetry. ~8 MB, launches instantly.

Kuku (web: kuku.mom, open source @ github kuku-mom/kuku) - Open-source local-first Markdown workspace for macOS. Kuku keeps notes as ordinary .md files in a local vault while adding search, backlinks, graph navigation, Second Brain workflows, AI-assisted edits, reviewable diffs, and optional encrypted sync.

marka.md (web: markamd.vercel.app, open source @ github mattenarle10/markamd) - Local-first macOS Markdown editor built with Tauri 2 (Rust + React 19) for organizing AI context files. Features an IDE-style folder sidebar with drag-to-move, ⌘⇧C copies clean Markdown to clipboard for pasting into Claude/ChatGPT/agents, live preview with Mermaid + KaTeX + Shiki syntax highlighting, ⌘K command palette, find/replace, reading mode, and 5 themes (Catppuccin family + matcha). Notarized macOS build with auto-updating via signed releases, ~12 MB bundle, MIT licensed.

Markup (open source @ github oratis/Markup) - Reader-first native macOS Markdown editor built with Tauri 2 (Rust + system WebView, ~88 MB RAM). Renders your .md like a clean web page and you edit on demand — WYSIWYG via Milkdown, or raw source. Includes a vault with wikilinks, backlinks and a graph view, Tantivy full-text search (a 10k-file vault indexes in ~1s), KaTeX math, Mermaid diagrams, three themes (light/dark/sepia), and one-click MD→HTML export (a clean, self-contained page). MIT licensed.

Edmund (open source @ github I7T5/Edmund) - Minimal, native macOS Markdown editor with live preview — built with AppKit + TextKit 2 (~15 MB), not Electron or a webview. Works directly with your existing .md files: no vault, no enforced folder structure. Renders as you type, hiding syntax delimiters outside the active block. Supports GitHub Flavored Markdown plus opt-in highlights, [[wikilinks]], footnotes, Obsidian-style callouts and comments, and inline/display math via SwiftMath. Keyboard-first, fully offline, auto-updating via Sparkle, Apache 2.0 licensed.

Everseq (open source @ github alkalim/Everseq) - Open-source local-first Markdown outliner for macOS. Everseq stores notes as ordinary .md files while adding block trees, page and block references, embeds, queries, backlinks, daily notes, and full-text search. Built with Swift, AppKit, and SwiftUI; AGPL-3.0 licensed.

Markdown Mobile Editors

Android

Apple iOS/iPhone

Misc

MDPR (open source @ github ch040602/MdPr, npm: @mdpresent/cli, optional Codex skill @ github ch040602/mdpr-skill) - Open-source Markdown presentation renderer/exporter for turning .md decks into editable PPTX, HTML, PDF, previews, and visual review artifacts. Supports themes, layout hints, charts, tables, diagrams, icon search, and deterministic rendering without requiring an LLM; the optional mdpr-skill repository adds Codex-assisted semantic hints and visual review reports.