Capture ideas, organize knowledge, and plan from a fast local-first editor that keeps notes as plain Markdown files. Octarine combines a Daily Desk, workspace search, tasks, properties, backlinks, optional AI assistance, shared-note feedback, and a companion web clipper across desktop and iOS.

Desktop app · Mobile app · Browser extension
macOS · Windows · Linux · iOS

Private knowledge management and daily work in files you own

PaidOpen source

MarkdownObserver

Watch Markdown change as agents, editors, and scripts write it.

Preview Markdown in a native macOS app while it watches project folders for saved changes. MarkdownObserver adds workspace groups, favorite folder watches, multiple-file windows, syntax highlighting, breadcrumbs, and gutter or comparison indicators that make live document edits easy to follow.

Desktop app
macOS

Rendered readingLocal files

Following Markdown that AI agents, editors, or scripts update on disk

Free

HermesMarkdown

Edit local Markdown folders directly from your browser.

Open a folder as a vault and read or write its Markdown files through the browser's File System Access API, with no account or default upload step. HermesMarkdown adds command search, frontmatter, vault-wide tasks, interactive tables, optional GitHub sync, and bring-your-own-key AI actions with review before changes are applied.

Web app
Web

Local-first Markdown writing in a Chromium-based browser without an account

FreeOpen source

Docsify-This

Turn an online Markdown file into a shareable web page in seconds.

Paste a public Markdown URL from GitHub, Codeberg, or another host and publish it as a styled page without setting up a server or changing the source file. Docsify-This supports standalone pages, linked sites, presentations, embeds, layout and typography options, Mermaid, LaTeX, and reusable publishing URLs.

Web app
Web

Sharing hosted Markdown as styled pages without a build or deployment setup

FreeOpen source

glu

Convert Markdown, HTML, and Lua into production-grade PDFs.

Run a cross-platform command-line tool that turns Markdown or HTML into PDF and exposes Lua for full programmatic control. glu supports YAML frontmatter, custom CSS, Go templates, syntax highlighting, TeX math, attachments, reusable project templates, and tagged PDF/UA or archival PDF/A output.

CLI
macOS · Windows · Linux · CLI

Automated, accessible, and highly customized PDF publishing from Markdown

FreeOpen source

Markpad

The lightweight Notepad equivalent for Markdown.

Open, edit, and preview Markdown in a fast cross-platform desktop app built with Tauri. Markpad combines tabs and multiple windows with Monaco editing, split view, auto-reload, Vim mode, Mermaid and KaTeX rendering, themes, zen mode, image pasting, and PDF or HTML export without telemetry.

Desktop app
macOS · Windows · Linux

Raw sourceSplit source + previewLocal files

A fast, familiar desktop editor for opening and polishing individual Markdown files

FreeOpen source

KeenWrite

Write Markdown and produce beautifully typeset PDFs.

Create technical papers, manuals, books, and other long-form documents in a free cross-platform Markdown editor. KeenWrite combines live preview, reusable variables, spell checking, document statistics, outlines, math, diagrams, R integration, international font support, and theme-driven PDF export.

Desktop app · CLI
macOS · Windows · Linux · CLI

Raw sourceSplit source + previewLocal files

Technical and long-form writing that needs polished, repeatable PDF output

Freemium

Saive

Save the web as a searchable Markdown knowledge library.

Collect articles, threads, videos, papers, and PDFs from the browser, then organize them with AI-generated summaries, key points, tags, highlights, and notes. Saive stores each item as Markdown with YAML frontmatter, supports full-vault export, and connects saved knowledge to AI tools through feeds and MCP.

Web app · Browser extension
Web

Building a portable research library from material saved across the web

Free

Marknote

A native Windows studio for Markdown workspaces.

Write in a multi-tab Windows editor with live previews for math, diagrams, and code while keeping every note in plain files. Marknote adds wiki links, workspace tasks, Git tools, file history, a command palette, Vim mode, custom keybindings, and export through print, PDF, HTML, or Pandoc.

Desktop app
Windows

Windows users managing Markdown notes and projects in local workspaces

Freemium

Markdown Mono

A focused, private Markdown editor for Android.

Open, edit, preview, and save Markdown directly on Android without an account, sync service, or tracking. Markdown Mono includes a formatting toolbar, search, recent files, handcrafted themes, PDF printing, and file protection and recovery while continuing to work fully offline.

Mobile app
Android

Raw sourceRendered readingLocal files

Distraction-free Markdown editing on Android with no account or cloud dependency

Freemium

Markdific

A polished desktop viewer and editor for Markdown files.

Open Markdown in a clean cross-platform desktop app with rendered, source, and split views. Markdific adds autosave, outline navigation, syntax highlighting, LaTeX, Mermaid, themes, presentation mode, and exports to PDF, Word, or HTML, plus Quick Look integration on macOS.

Desktop app
macOS · Windows · Linux

Raw sourceSplit source + previewLocal files

Viewing and polishing Markdown across macOS, Windows, and Linux

FreeOpen source

SilverBullet

A self-hosted, programmable Markdown knowledge platform.

Run a browser-based personal knowledge workspace that stores pages as Markdown files on your own server. SilverBullet combines live preview, wiki links, backlinks, tags, tasks, full-text search, structured objects and queries, and deep customization through Space Lua, commands, widgets, and styles.

Web app
Web · macOS · Windows · Linux

Technical note-takers who want a self-hosted and deeply programmable knowledge base

An unlisted capability may be unverified. Pricing describes the product; individual features may require a paid plan.

Browse by workflow

Editors

Focused apps for writing and previewing Markdown.

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Viewers & Preview

Read rendered Markdown and follow changes without opening a full editor.

+5 more

Notes

Knowledge bases and note-taking systems built around plain text.

+28 more

Collaboration

Shared Markdown workspaces for teams, classrooms, and communities.

+2 more

Converters

Tools that move Markdown between documents and publishing formats.

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Developer tools

Linters, parsers, and command-line tools for Markdown workflows.

+1 more

Publishing

Turn Markdown files into documentation, books, and websites.

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The Markdown software directory

Find the right Markdown tool.

Compare editors, note apps, extensions, agent tools, and converters without the affiliate noise.

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Explore the directory

Search 92 carefully selected tools across 7 practical categories.

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