Free, open-source
music notation.

Runs on your desktop or in the browser. Extend it with community plugins, AI editing tools, or write your own.

Nubium music notation editor showing a score called Sea of Clouds

Fully featured

MIDI input, guitar tabs, AI editing, four independent voices, flexible input modes, export to PDF or audio, and more. We're in beta and adding features fast — tell us what you need.

Works with all standard formats

Nubium uses MusicXML as its file format, so your scores are compatible with almost all other tools. Paste tabs, LilyPond, or ABC notation onto a score and see it instantly render. Select notes and copy as any text-based format.

Configure your workspace

Plugin-based architecture and drag-and-drop UI panels. Turn off what you don't need, find or build plugins for what you do.

Features

Input modes

Pitch-before-duration, insert mode, or standard entry. Work however you prefer.

AI editing

Edit your score with natural language. Bring your own API key.

Guitar tablature

Full tab support with a wide range of guitar-specific articulations and techniques.

MIDI input

Step entry from any MIDI controller.

Plugins & configuration

Install community plugins or write your own. Customize keybindings, settings, and layout.

4 independent voices

Four voices per measure with a color-coded cursor so you always know which voice you're editing.

Command palette

Search and run any command without leaving the keyboard.

Paste & copy as

Paste guitar tabs, LilyPond, or ABC directly onto the sheet and see it instantly render. Select notes and copy as any format.

File history

Automatic snapshots of your score. Go back to a previous version anytime.

Export to PDF & audio

Print-ready PDFs and WAV audio export.

Your feature here

Tell us what you need.

Try Nubium

Nubium is free. No account required.

Help docs

Learn how to use Nubium.

Roadmap

See what we're working on.

Community

Connect with other users.