Composers: write, collaborate, and publish sheet music online

Flat is trusted by over 5 million musicians and works on iOS, Android, Mac, Windows and the web. Write, edit, collaborate and export scores with professional notation tools, 180+ premium instruments, and support for PDF, MP3, WAV, MIDI and MusicXML.

Yes. Flat includes native iOS and Android apps, so you can compose from your phone or tablet with the same tools available on desktop. With Flat Power, your scores stay synced across every device.

Open Flat in your browser and start composing instantly — no download required. Create scores with dynamics, articulations, lyrics, chord symbols, guitar tabs, MIDI input, and more than 180 instruments.

Music notation software lets you write, arrange, play back, and share sheet music digitally. Flat combines professional notation, realistic playback, and real-time collaboration in one modern app available on web, desktop, and mobile.

Yes. Flat's free plan includes the full notation editor and real-time collaboration. Flat Power unlocks cross-device sync, advanced engraving, version history, inline comments, and premium instruments.

Yes. Flat works in any modern browser and also offers native apps for Mac, Windows, iOS, and Android. With Flat Power, your scores stay synced across every device.

No. You can start composing directly in your browser in seconds — no installation required. Desktop apps for Mac and Windows are also available if you prefer a native experience.

Yes — real-time collaboration is included on every plan, including free. Invite co-writers by link, watch live cursors as they edit, and use inline comments and full version history with Flat Power.