Write your music scores online

With the easiest tool for creating sheet music together

Online music notation software

Whether you're a beginner or a professional composer, our user-friendly music composition software gives you all the tools that you need to make your own sheet music. You can write, listen, share and discover music scores right in your web browser on any device.

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Collaborative music notation

Invite your friends to compose your music scores online collaboratively. A single musical composition can be opened and edited in real time by multiple people using different devices at the same time (even if you want to write the new Top Charts with 1000 collaborators).

Start your First Score

Flat is more than just a sheet music maker, it's a community

Every single day, thousands of new composers and musicians join Flat. Share your music scores with them and discover the best creations made by our community.

Flat users in 189 countries worldwide

The most advanced music writing software

In addition to a professional-quality music notation, we designed great and innovative features that will help you create your own music.