Music to MIDI Converter Online
Turn a piece of music into editable MIDI notes — upload the track, preview the AI transcription, fine-tune it, and download, all in your browser.
- MP3 / WAV
- Melody & harmony
- Sheet music export
Click a note to hear it
How it works
Upload your music
Drop an MP3 or WAV of the track you want to transcribe. No account needed to convert and preview — it starts instantly in the browser.
Preview and fine-tune
Listen to the transcription on a piano roll, compare it to the original, and adjust detection sensitivity or minimum note length to re-transcribe.
Download MIDI or sheet music
Download the MIDI, correct notes on the roll, or export sheet music as MusicXML/PDF for MuseScore, Sibelius, or printing.
Formats & limits
- Input formats
- Music
- Output
- MIDI
- File limits
- 50 MB · 10 min
- Price
- Free · no sign-up
Getting the cleanest music transcription
- A single, clear lead line transcribes far better than a full mix — isolate the melody or use a stem if you have one.
- Full songs with drums, bass, and layered instruments will produce extra notes; expect to clean them up in the editor.
- Trim intros, outros, and silence so detection focuses on the musical content.
- AI transcription is a starting draft — the editor is where you turn it into a usable score.
Frequently asked questions
Can I convert any music to MIDI?
You can upload any MP3 or WAV, but how usable the result is depends heavily on the material, not on the file itself. Clear, monophonic music — a solo instrument, a lead melody without much underneath it — comes out closest to accurate, because that's the kind of material the underlying transcription model performs best on. Dense, fully-produced songs with drums, bass, and layered instruments will come back with meaningfully more extra or misplaced notes, since the model is estimating pitch across everything sounding at once rather than one clean line. Neither case is a hard failure: the piano roll editor lets you delete stray notes, fix octave slips, or re-transcribe with different sensitivity settings on the same upload, so even a messier source still gets you a usable starting point rather than nothing at all.
What formats are supported?
MP3 and WAV uploads are accepted, capped at 50 MB and roughly 10 minutes per file, which covers essentially any single track without needing to split it up first. WAV carries no real transcription advantage over a reasonably encoded MP3 here — both decode to the same audio data the model actually analyzes, so the difference only shows up if the MP3 was encoded at a very low bitrate that introduced audible compression artifacts. What matters far more than the container format is the content: start from the cleanest, least cluttered version of the music you have access to, whether that means an instrumental, an isolated stem, or simply the best-quality file rather than a re-encoded copy of a copy — a low-bitrate MP3 re-exported several times loses more than the format choice ever costs you.
Is the music to MIDI converter free?
Yes — converting and previewing is free with no account required at any point. Upload a track, watch the transcription appear on the piano roll, and listen back against the original immediately; that full evaluation step costs nothing and needs no signup. What an account adds is what comes after you've decided the result is worth keeping: your conversion history persists so you can return to past uploads later, the full note-editing toolkit (move, delete, transpose, re-quantize) becomes available instead of just previewing, and you can export the finished result as MusicXML or PDF sheet music in addition to the plain MIDI file. A one-off MIDI download with no editing needs no account either way, and it's the same transcription engine behind both paths.
How is the transcription done?
By Basic Pitch, Spotify's open-source, instrument-agnostic pitch-detection model — the same engine behind every audio conversion on this site, not something built or tuned specifically for this page. It listens to the uploaded audio and estimates which notes are sounding, when each one starts and stops, and how strongly, then writes that out as MIDI note data rather than trying to reproduce the waveform itself. Published research on the model shows its accuracy varies by source material rather than being one fixed number across the board, which is exactly why the piano-roll preview and re-transcription controls exist here: you can fine-tune detection sensitivity and minimum note length, then re-run the same upload as many times as it takes to get a result worth keeping, all without uploading the file a second time.