Free Online MIDI Editor
Free online MIDI editor — edit .mid files on a piano roll, hear them instantly with built-in SoundFont sounds, and export for any DAW. No download.
Why use this online MIDI editor
Piano roll editing
Draw, move, resize, copy, quantize, and transpose notes on a full piano roll, with multi-track, velocity, and tempo control — built for fast MIDI editing with no DAW to install.
Instant SoundFont playback
Hear your MIDI the moment you edit it. Built-in SoundFont instruments mean no silent files and no 'MIDI has no sound' setup — just press play.
Import and export .mid files
Open any standard .mid file, edit the arrangement, then download a clean MIDI file for Reaper, FL Studio, Ableton, Logic, Cubase, or hardware.
How to edit MIDI online
Go from a MIDI file to a finished edit in three steps, right in your browser.
Open or import a MIDI file
Start from an empty song or upload an existing .mid file from your computer.
Edit on the piano roll
Draw and move notes, change velocity, adjust tempo and BPM, choose instruments, and organize tracks.
Play back and export
Preview with SoundFont playback, then download a standard MIDI file for your DAW, notation app, or hardware setup.
What is an online MIDI editor?
An online MIDI editor is a browser-based tool for creating and editing MIDI files. Instead of recording audio, MIDI stores notes, timing, velocity, instruments, and tempo changes — which makes it perfect for composing melodies, chord progressions, drum patterns, and arrangements you can reuse in any DAW. This free MIDI file editor runs entirely in your browser, so there is nothing to download or install.
The editor gives you a piano roll, multi-track view, tempo and BPM editing, note velocity control, and instant SoundFont playback so you can hear every edit. You can draft ideas quickly, fix the timing of a generated MIDI file, change instruments, transpose a melody, or clean up a track before sending it to another app.
Because it is a web MIDI editor, it works the same on Mac, Windows, Linux, and Chromebook — no freeware download required. Import a .mid file, edit the notes, audition the result with built-in instruments, and export a standard MIDI file for Reaper, FL Studio, Ableton, Logic Pro, Cubase, Pro Tools, a notation app, or a hardware sequencer.
MIDI Editor FAQ
Yes. This MIDI editor runs in your browser and is completely free to create, import, edit, play, and export MIDI files — no account or payment required.
No. It is a web-based MIDI editor that works in any modern browser, so there is no download or freeware to install. It runs on Mac, Windows, Linux, and Chromebook.
Yes. Open a .mid or .midi file from your computer, then edit its notes, tracks, tempo, instruments, and other MIDI events on the piano roll.
Yes. After editing, download a standard MIDI file and open it in your DAW, notation software, virtual instrument, or hardware sequencer.
Yes. The main editor is a piano roll where you can draw, select, move, resize, copy, paste, quantize, and transpose notes across multiple tracks.
Yes. Unlike many MIDI editors, playback uses built-in SoundFont instruments, so you hear your file immediately. If a MIDI file seems to have no sound elsewhere, it is usually because that player has no instrument sounds loaded — here they are built in.
Yes. You can adjust the tempo and BPM of the whole song or a section, then export the updated MIDI file. This changes how fast it plays without converting it to audio.
Yes. Assign a different instrument to any track using the built-in instrument list, preview it with SoundFont playback, and export the file with your changes.
Yes. Create and edit multiple tracks, arrange sections along the timeline, and shape dynamics with velocity and controller editing for expressive MIDI.
Yes. Export a standard MIDI file from your DAW, open it in this online editor, make your changes, then import the edited .mid file back into Reaper, FL Studio, Ableton, Logic Pro, Cubase, Pro Tools, or any other DAW.
Yes. Because it runs in the browser, this MIDI editor works on Mac, Windows, Linux, and Chromebook — you only need a modern web browser.
MIDI is performance data — which notes to play, when, and how strongly — not recorded sound. A MIDI editor changes notes and timing, while an audio editor changes an actual recording such as an MP3 or WAV.
Explore more free tools
Start editing MIDI online
Open the free browser MIDI editor, shape your ideas on the piano roll, and export a clean MIDI file for your next track.