Shape the Piano Roll
Draw notes, move them to a new pitch or beat, and drag their edges to change duration. Use grid snapping for more consistent timing.
MIDI Editor
Opening MIDI…
MusicGo / MIDI Editor
A Free MIDI Editor for Your Next Musical Idea
A MIDI file is a set of musical instructions: which notes to play, when they begin, and how they sound. MusicGo’s browser-based MIDI Editor lets you work on those details directly. Open a MIDI file or start with a blank song, then shape the music one note at a time.
Open MIDI Editor
Shape the Piano Roll · Add Expression
MIDI Editor Tools for Every Note
Keep the melody, change the feel. Use the piano roll and track controls to make precise changes without installing a desktop sequencer.
Add Expression
Adjust note velocity, pitch bend and MIDI controller events. Give a repeated phrase more contrast instead of leaving every note at the same intensity.
Build Multiple Tracks
Separate melody, chords and bass into tracks. Rename parts, select instruments, and use mute or solo to hear what each part contributes.
Set the Pace
Change tempo and time signatures, listen with the metronome, and loop a passage while refining its rhythm. Undo and redo let you explore changes.
How to Use the Online MIDI Editor
- 01
Open or Start Fresh
Use File → Open to choose a .mid or .midi file from your device. Choose New to compose from a blank song. Imported files can be up to 5 MB.
- 02
Edit, Listen, Refine
Select a track and work in the piano roll. Add or move notes, adjust lengths and velocity, then play back the phrase to hear your changes.
- 03
Save Your Next Version
Save a MIDI file to keep editing in a DAW, or export WAV or MP3 for listening and sharing. Keep a downloaded copy of work you want to retain.
Build Multiple Tracks
A MIDI Editor for Practice, Production & New Ideas
Sketch a Melody
Build a hook, try a different bass line, or hear the same phrase with another instrument before developing it in your main music software.
Understand an Arrangement
Open a MIDI file to inspect its notes, isolate individual tracks and slow the tempo. See how melodies, chord parts and rhythms fit together.
Clean Up a Transcription
Review MIDI detected from a recording. Remove stray notes, correct pitches, and adjust note endings before using the result in a larger project.
From Audio to MIDI Editor, in One Workflow
Starting with a recording? Use MusicGo Audio to MIDI to detect notes from a selected passage, then choose Edit MIDI to bring the result straight into this editor. Your file stays in the browser throughout the handoff.
Transcription is a separate tool. Clear, isolated instruments or melodies usually give cleaner results; review detected notes before exporting.
Audio to MIDI
Audio to MIDI → Edit MIDI
A Local MIDI Editor. Flexible Ways to Export.
Keep the editable performance or turn it into a listening copy. MIDI stores notes and musical events; WAV and MP3 render audio using the editor’s selected sounds.
- .MID
- Editable notes, tracks and musical events for a DAW or another MIDI application.
- .WAV
- An audio render for further audio editing or listening without a MIDI instrument.
- .MP3
- A compressed audio render for convenient listening and sharing.
Free to use, with no sign-in or credits. MIDI import, editing and export run on your device. Browser storage is not a backup: download your MIDI file before clearing site data or changing devices.
MIDI Editor Questions, Answered
File formats, local processing and what to expect from the online workspace.
Is the MusicGo MIDI Editor free?
Yes. The MIDI Editor is free to use without an account, subscription or credits. You can open, edit and export MIDI files in your browser.
Which files can I open in the MIDI Editor?
Open Standard MIDI files with a .mid or .midi extension, up to 5 MB. MP3 and WAV are audio, not MIDI: use Audio to MIDI first if you need to detect notes from a recording.
Can I edit more than one MIDI track?
Yes. Work with multiple tracks, select their instruments and edit notes in the piano roll. Mute and solo help you listen to one part or compare it with the arrangement.
Can I download the result as MP3 or WAV?
Yes. Save MIDI to retain editable musical events, or use the File menu to export WAV or MP3 audio. Audio exports use the editor’s playback sounds and may sound different from the same MIDI played in a DAW.
Are my MIDI files uploaded to MusicGo?
No. This editor imports and processes MIDI locally in your browser. It downloads the editor and sound assets needed for playback, but your MIDI file is not uploaded for editing or export.
Does the MIDI Editor automatically compose music?
No. This is an editor for writing and refining MIDI notes and events. For AI music generation, use MusicGo AI Music Creator. For detecting notes in existing audio, use the separate Audio to MIDI tool.
Can I use the MIDI Editor on a phone?
You can open it in a modern mobile browser, but the detailed piano roll and track controls are easiest to use on a desktop or tablet with a larger screen. Save a downloaded MIDI copy before leaving your session.
Your Next Version Starts in the MIDI Editor
A few notes, a different rhythm, a new direction. Open your MIDI file and make it yours — free, right in your browser.
Open MIDI Editor