This Chrome extension opens articles in a quiet reader and saves selected passages with their source URL, title, date, and optional category. Quotes stay in Chrome storage and can be exported together as a Markdown file; it does not convert whole articles. The free tier holds 10 quotes, and a one-time PRO purchase unlocks unlimited local saves.

Browser extension
Web

Writers and researchers collecting attributed passages in Markdown

FreeOpen source

MarkTide

Write and preview Markdown in a free browser editor.

MarkTide provides a source editor beside a live Markdown preview, with tables, tasks, math, Mermaid diagrams, and highlighted code. It opens dropped Markdown files and exports to PDF, HTML, or plain text. The public browser app is free without an account. Its repository LICENSE is Apache-2.0, despite an outdated MIT badge in the README.

Web app
Web

Raw sourceSplit source + previewLocal files

Writing a Markdown document in the browser and exporting a polished copy

FreeOpen source

Netherstone

Write local Markdown notes in a visual desktop workspace.

Netherstone stores each document as a plain Markdown file in a folder you choose. Its formatted editor supports tables, to-dos, document outlines, search, links between notes, and drawings. The app works offline; optional sync uses your own GitHub account. Public beta builds are available for Windows, macOS, and Linux.

Desktop app
macOS · Windows · Linux

Inline live previewRendered readingLocal files

Keeping portable Markdown notes in a desktop vault with optional sync

FreemiumOpen source

puppyone

Edit local Markdown files alongside your coding agents.

puppyone is a desktop file workspace with Markdown editing and preview, local folders, Git history, and a terminal for coding agents. Files stay on your computer until you choose optional cloud hosting and collaboration. The desktop source is available under Apache-2.0. Cloud plans include a free tier and paid workspace options.

Desktop app
macOS · Windows

Raw sourceInline live previewLocal files

Developers editing project Markdown beside agent-driven work

Freemium

Display

Publish a Markdown file as a shareable, editable web page.

Display turns a Markdown or HTML file into a hosted page with a persistent link. Readers can comment, while permitted collaborators can propose visual or source edits and save a new version. Markdown pages support tables, task lists, math, and Mermaid diagrams. Public pages are available on the free plan; retained version history and higher sharing limits depend on the plan.

Web app · CLI · AI agent plugin
Web · CLI

Raw sourceVisual (WYSIWYG)

Sharing a Markdown document for review and sequential edits

Free

Prisment

Edit local Markdown and convert documents in one workspace.

Prisment is a browser and desktop workspace for local Markdown folders. It offers source, split-preview, and visual editing, plus rendered reading, file tabs, an outline, search, and change detection for files edited elsewhere. It also converts Word, PDF, and spreadsheet content into Markdown or CSV, and exports Markdown as standalone HTML or through browser printing. Its offline workflow is free.

Web app · Desktop app
Web · macOS · Windows · Linux

Raw sourceSplit source + previewLocal files

Working with local Markdown folders while converting office documents

FreeOpen source

Kova

Build presentations from plain Markdown.

Write slides in a Markdown file while Kova renders the current slide beside the source. Automatic layouts, themes, Mermaid diagrams, math, code highlighting, and speaker notes support technical presentations. Export finished decks to PDF, PowerPoint, or standalone HTML. The free desktop app works with local files on macOS, Windows, and Linux.

Desktop app
macOS · Windows · Linux

Raw sourceSplit source + previewLocal files

Creating technical presentations from portable Markdown files

Freemium

Deft

Write Markdown notes on desktop and Android, with LaTeX tools on desktop.

Deft formats Markdown notes as you type, including links, tables, task lists, footnotes, and math. Its desktop LaTeX editor renders source inline and includes a compiler and PDF reader. Markdown editing is available for macOS, Windows, Linux, and Android, with an Android APK offered on the official site. Editing is free, with optional encrypted folder sync currently free in beta and planned as a paid add-on.

Desktop app · Mobile app
macOS · Windows · Linux · Android

Inline live previewRendered readingLocal files

Keeping Markdown notes and LaTeX writing in a local folder

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

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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.

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

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Shared Markdown workspaces for teams, classrooms, and communities.

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Converters

Tools that move Markdown between documents and publishing formats.

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

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Publishing

Turn Markdown files into documentation, books, and websites.

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