Flat: Online collaborative music notation software

Q: Does real-time collaboration work on the mobile app?

Yes. Flat's real-time collaboration works across all devices and platforms — desktop, web, iOS, and Android. Every note added by any collaborator is instantly visible to the entire team without needing to refresh.

Q: Can I prevent someone from changing my work?

Yes. You can set individual permissions to "Can View" or "Can Edit." If someone makes a mistake, you can use Version History to restore your original work in one click.

Q: Is there a limit to how many people can edit at once?

No. Flat has no limit on the number of collaborators on a score. Invite your entire band, class, or team — everyone can edit simultaneously in real time.

Q: Can I see who made specific changes to the music?

Yes. Flat's version history shows exactly who contributed each change and when, giving you full visibility over your collaborative score at all times.

Q: Is it possible to chat with my team inside the editor?

Flat doesn't have a built-in chat, but you can communicate directly on the score using inline comments. Leave feedback on specific measures or notes and tag your teammates to keep the conversation in context.

Q: What is real-time music notation collaboration?

Real-time music notation collaboration means multiple musicians can edit the same sheet music score simultaneously online. Changes made by any collaborator appear instantly for everyone — no file sharing, no version conflicts, no refresh needed.

Features
Product Overview
Discover all Flat tools that empower you to be the best composer you can be!
Real-time Collaboration
High-Quality Instruments
Offline Mode
Desktop appNEW
Guitar Tab Editor
PDF ImportNEW
Learn
Help Center
We have help pages with product guidelines and a great customer support team at your service.
Blog
Explore articles and resources on composing, music theory, music promotion, and other topics for musicians.
Product Updates
Check the latest updates and features on Flat!
Video Tutorials
Try our quick tutorials and start composing in Flat!
Pricing
Community
Discover the community
Join a community of 5M+, share your music to get feedback or check the most popular compositions.
Monthly challenge
Get inspired by our musical challenge! Participate to win prizes and gain visibility.
Affiliate program
Join our program and earn commission while inspiring your audience with a great tool!
Our Products
Flat
Write sheet music online, collaborate in real time and share music with a 5M+ community!
Flat for Education
Create and collaborate on sheet music in your classroom. Ideal for schools and districts.
Music Snippet
Create music notation snippets for Google & Microsoft tools.
Embed
Interactive sheet music for your website. Perfect for teaching and learning.

How it works

Start collaborating in seconds

1
Share a link
Invite a collaborator to your score with a simple link — no account needed to view.
2
Compose simultaneously
Watch cursors move in real time as your partners edit the notation and add new sections.
3
Browse version history
See who made each edit at any point — and restore any previous version in one click.

Inline comments and live collaboration in the Flat editor

Live cursors
See exactly where your teammates are editing
Work side-by-side with identifiable live cursors — visible in real time as your collaborators move through the score.
Inline commenting
Leave feedback without leaving the score
Add comments on specific measures or notes and resolve musical ideas faster — without ever leaving your creative workspace.
Instant global syncing
Every change, instantly visible
Whether you're on desktop or mobile, every note is instantly visible to your entire team — no refresh needed.

Built for every kind of music collaboration

Composers & arrangers
Write entire arrangements together in a single, distraction-free workspace.
Music educators
Provide live feedback directly in the score, without the classroom delays.
Songwriting bands
Write and refine across a distributed group. Built with your team in mind.
Publishing teams
Review and approve scores for a refined, professional cloud publication.

Smart access control

Collaboration is available to all Flat users

Private & shared links
Choose whether your score is private or generate public “view-only” links for the community.
Automatic cloud backups
Every note is synced and backed up automatically — no manual saves, no data loss.

400K+ collaborations

Thousands of musicians are co-creating scores on Flat every day. Explore what the community is building and get inspired.

Start browsing

6M+ musicians worldwide

From students to professional composers, musicians all across the globe use Flat to write, collaborate, and share their music.

Start collaborating in seconds

Share a link

Compose simultaneously

Browse version history

See exactly where your teammates are editing

Leave feedback without leaving the score

Every change, instantly visible

Built for every kind of music collaboration

Composers & arrangers

Music educators

Songwriting bands

Publishing teams

Collaboration is available to all Flat users

Private & shared links

Automatic cloud backups

Frequently asked questions

Does real-time collaboration work on the mobile app?

Can I prevent someone from changing my work?

Is there a limit to how many people can edit at once?

Can I see who made specific changes to the music?

Is it possible to chat with my team inside the editor?

What is real-time music notation collaboration?

Ready to compose together?