Fully Open-sourced Online MIDI Editor

Orchestrate freely with the multi-track piano roll editor. Of course, you can use velocity, pitch bend, expression, and modulation to create expressive sound.

With our specially developed high-performance sound module, you can load your sound fonts and play sounds seamlessly.

You can save the music you create as a WAV file and listen to it on your smartphone, use it as background music for your videos, or import it into your DAW.

Using a browser that supports the Web MIDI API, you can record the performance of a MIDI keyboard connected to your computer, or play sounds from a hardware synth.

You can freely change the tempo and time signature anywhere in the song using the graph editor.

Want to hide the browser's address bar? You can install it on your desktop and use it as an app.