MIDI Editor Online
Play, inspect, trim, quantize, and clean up MIDI in the browser
PureMIDI's online MIDI editor: import a .mid file or start from scratch, edit notes on a piano roll with multi-track support, velocity editing, quantize, copy/paste, then export a clean MIDI file. Runs entirely in your browser — no install needed.
Open a MIDI file or start drawing notes
or drag & drop a .mid file here
Editing workflow
- 01
Open or create MIDI
Upload an existing .mid / .midi file or start from an empty piano roll.
- 02
Play and inspect tracks
Check tempo, tracks, note counts, and problem sections before sending the file to a DAW.
- 03
Light edit and export
Trim, quantize, adjust tempo, mute tracks, then download an updated MIDI file.
Why this editor exists
Review conversion quality
Hear whether the MIDI is usable before opening your DAW.
Clean transcription output
Remove empty space, bad sections, or tracks you do not need.
Teaching preview
Play student conversions directly in the browser.
Light production prep
Do basic quantize, tempo cleanup, and trimming before deeper DAW work.
What the editor can do
- Import .mid / .midi files or start from scratch with the draw tool.
- Multi-track piano roll with note selection, move, resize, and velocity editing.
- Playback with per-track mute/solo, adjustable BPM and time signature.
- Quantize, transpose, copy/paste, undo/redo (50-step history).
- Export edited MIDI as a standard .mid file for any DAW.
Editor features
| Feature | Status | Notes |
|---|---|---|
| Piano roll editor | Live | Canvas-based note editing with draw/select/erase tools |
| Multi-track support | Live | Add, delete, mute, solo, duplicate tracks |
| MIDI import & export | Live | Open .mid files and export edited MIDI |
| Velocity editor | Live | Visual velocity lane synced with piano roll |
| Quantize & transpose | Live | Snap notes to grid, shift by semitone or octave |
| Keyboard shortcuts | Live | Space, S/D/E, Ctrl+Z/Y, arrow keys, and more |
Online MIDI editor FAQ
Is the online MIDI editor free?+
Yes. The browser MIDI editor is free to use with no account required. Import, edit, and export MIDI files directly.
Will it replace Ableton or Logic?+
No. PureMIDI's editor is for quick review, cleanup, and light editing. Serious production still belongs in a DAW.
Can I upload my own MIDI files?+
Yes. Click Open or drag and drop a .mid / .midi file into the editor to start editing immediately.
Does the editor support multiple tracks?+
Yes. You can add, remove, mute, solo, and duplicate tracks. Each track has its own instrument and color.
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