MDown .org
Get MDown 1.2.1
Released 2026-08-09. Free and open, no account, no telemetry.
curl -fsSL https://mdown.org/install.sh | sh
~/.local. Re-run it any time to update, or
use mdown --update. MDOWN_PREFIX changes
where it goes, MDOWN_VERSION pins a release.
Packages
Checksums for every file are published at /releases/SHA256SUMS, and the one-line installer verifies them for you.
Installing by hand
Debian and Ubuntu
Installs to /opt with a menu entry and the
Markdown file association.
sudo apt install ./mdown_1.2.1_amd64.deb
Portable tarball
Unpack it anywhere and run it. Everything it needs travels in the folder.
tar xzf mdown-1.2.1-linux-x86_64.tar.gz
cd mdown-1.2.1-linux-x86_64 && ./mdownmacOS
The disk image above is one universal build for Apple Silicon and Intel,
and the one-line installer handles it for you. Copying
MDown.app across by hand needs one extra step,
because the app is signed but not notarised: macOS quarantines anything
downloaded from the web, and the first launch fails with
"MDown is damaged and can't be opened" or "cannot be opened
because the developer cannot be verified". Clear the flag:
xattr -dr com.apple.quarantine /Applications/MDown.app
curl line above avoids all of
this, since it clears the flag itself.
Other platforms
x64
Builds today with Visual Studio 2019 or newer; a prebuilt installer will follow the macOS one.
Phones and tablets
The same documents, read the same way, on a phone. It will be listed here when it is out.
Building from source is covered in the build guide.