Grand Piano HQ
High quality sound
Create sheet music online
Flat is the music notation software that combines professional tools with a beautifully simple interface— so you can compose, collaborate, and publish polished sheet music online with speed and ease.
Why musicians choose Flat
Intuitive music writing
Flat is designed to keep you in flow. With a clean interface, responsive shortcuts, and smart tools that adapt to your writing, you can focus entirely on your ideas—not the software.
Join for free
Complete music notation suite
From chamber scores to solo tabs, Flat delivers all the tools needed to compose, edit, arrange, and publish with precision. Every essential feature is here - refined for speed and control.
Check music notation editor
Collaborations in real-time
Invite a friend to a score to compose together on sheet music in real time. A single musical composition can be opened and edited in real time by multiple people using different devices at the same time.
Discover live collaboration
High-quality instrument playback
Flat includes 100+ studio-recorded instruments - delivering rich and expressive playback experience. With velocity layers like piano and forte, your sheet music sounds as professional as it looks.
Try it out 
Drums
High quality sound
Trumpet
High quality sound
Violin HQ
High quality sound
Guitar
High quality sound
Your music scores, always in sync
Start composing on your laptop, make edits on your phone, and finish on your tablet—Flat keeps everything perfectly synced across web, iOS, and Android. No uploads, no emails.
+5M community to keep you inspired
Explore +300K original sheet music or arrangements in Flat community. Share your music scores with the world, like and follow composers, or find collaborators. Win a prize on our monthly challenge!
Explore the communityJoin the community and start composing
I just want to say how grateful I am for the entire team at Flat! You guys are so amazing. With Flat, I have taken music from being a hobby to actually earning commissions and writing for professional ensembles and recordings. Wow!
Will Strassberger
Music composer - Roman Catholic Diocese of St. Augustine
I absolutely love using the programme! I am constantly surprised at how many features are here and the professional look of the final product.
Doug
Flat User
Since I've joined Flat, I've been able to grow as a musician and learn things I may have not ever learned in the music world. Again, I wanted to thank you for the amazing journey you have given me, through the monthly challenges, Flat Blog Posts, and a wonderful community that I take a responsibility to protect along with other great users
Frank De Leon III
Music composer, writer and SCAD student
Thank you so much for developing this tool. I found it super intuitive and easy to use.
Gideon Waxman
Flat User
I just quickly signed up to complete a quick transcription for a friend and I was blown away by the intuitiveness of your programme and that it was for free!
Dallin Attwooll
Flat User
I found Flat amazing to use! It's really good, I'll definitely be using it more from now on!
David Dariza
Flat User
Please keep up with your platform—it is a wonderful tool and has propelled our son into writing his own music in a way that no other platform or app has been able to.
Jonathon E. Stewart
Screenwriter of Pixar Disney’s Cars 3, Smallfoot & Angry Birds 2
Let me thank you for producing this tool! I have found it to work intuitively well, being able to enter some arrangements on my first attempts with the app on iPhone.
Bill Barto
Music Composer
Flat Power: for those who are ready to rock
Unlimited scores
Don't stop your creative flows, create scores without limits.
Compose offline
Keep composing offline. We sync all your changes when you are back online.
Customizable layouts, styles, and templates
Manage margins and spacing, stave size and spacing, measure numbers and add colored note heads.
180+ Instruments including HQ studio instruments
Create a specific sound you want to bring your ideas to life! With +90 HQ instruments and custom instruments you are equipped to create any sound you imagine. And, our list of instruments is constantly growing!
Advanced Playback
Get precise control over your music playback with adjustable part volumes and customizable reverb settings.
YouTube, Soundcloud, and MP3 audio uploads
Upload tracks from different sources to provide the ultimate listening experience.