plainmark.

Markdown, with room to think.

A little space
for your words.

A free, open-source Markdown viewer and editor for Windows, macOS, and Linux. Open a folder. Write directly in your document. Keep everything in plain Markdown.

Windows

Download for Windows

Windows 10 / 11 · Microsoft Store-signed · Internet required.

Other Windows options

View Microsoft Store listing · Standalone EXE (unsigned)

Some managed computers restrict Store installations. The standalone EXE may show a security prompt.

Use a command 
winget install --id 9PB6H8Z02K0G --source msstore

PowerShell or Command Prompt. Requires WinGet and Store access.

macOS

Download on the Mac App Store

macOS 11+ · Free on the Mac App Store.

Other Mac downloads

Mac · Apple Silicon · Mac · Intel

Direct downloads are publisher-signed and Apple-notarized. Choose your Mac’s chip.

Use a command 
brew install --cask gopalasubramanium/plainmark/plainmark@preview

Run in Terminal. Requires Homebrew; the “preview” cask installs v0.4.0.

Linux · AppImage

Download AppImage

Linux x64 · Requires WebKitGTK 4.1. Compatibility varies by distribution.

Use a command 
curl -fLO https://github.com/gopalasubramanium/plainmark/releases/download/v0.4.0/Plainmark_0.4.0_amd64.AppImage && chmod +x Plainmark_0.4.0_amd64.AppImage

Requires curl and WebKitGTK 4.1 on x64 Linux. Saves an AppImage in this folder; open the file to run.

Debian / Ubuntu

Download .deb package

Debian / Ubuntu x64 · Requires WebKitGTK 4.1.

Use a command 
curl -fLO https://github.com/gopalasubramanium/plainmark/releases/download/v0.4.0/Plainmark_0.4.0_amd64.deb && sudo apt install ./Plainmark_0.4.0_amd64.deb

Requires curl, apt, and WebKitGTK 4.1 on x64 Debian / Ubuntu. Asks for administrator approval to install.

v0.4.0 · Early release
Installation & release notes

One public baseline across these downloads: v0.4.0. An early release, with known limitations. Previous releases remain available.

The Windows Store installer needs internet and Store access; Microsoft handles its package signing and updates. The Mac App Store edition is also available as v0.4.0. Direct Mac downloads are publisher-signed and Apple-notarized. Homebrew uses those direct Mac downloads from our official tap. Linux packages are built on Ubuntu 22.04 and depend on system libraries.

Installation help · Code signing policy · Build from source

No accounts. No ads. No tracking. Always free.

Plainmark in visual editing view, with formatted Markdown, task checkboxes, document tabs, and a folder sidebar.
Visual. Source. Split. Read. Your document, however you like to work.

Your files stay yours.

Work with ordinary Markdown files on your own device. No upload, account, or cloud connection needed to write.

Just enough to write well.

Visual editing, folder workspaces, and tabs. Add Mermaid diagrams, math, SVG images, or local interactive HTML. Source and preview scroll together by Markdown block.

Open from the start.

Read the code, make a change, or share it with someone. Official releases are free, with no subscriptions or locked features.

Made for your words,
not your attention.

Plainmark is a small, independent open-source project. No bundled offers, telemetry, premium tiers, or ads. That is the commitment for official Plainmark releases.

Read our principles