About ConvertMP3toMIDI

What this site is

ConvertMP3toMIDI is a free audio-to-MIDI converter. You drop in an audio or video file, and the page writes out a standard MIDI file (.mid) that you can open in any DAW or notation program — Ableton, FL Studio, Logic, GarageBand, MuseScore and the rest.

MP3, WAV, M4A, FLAC, OGG, AIFF, Opus and WebM are all accepted, and the audio track of MP4, M4V or MOV files is read too.

Who made it

This site is made by ConvertMP3toMIDI. The note transcription itself is not ours to claim: it runs on Basic Pitch, the open-source audio-to-MIDI model released by Spotify's Audio Intelligence Lab under the Apache 2.0 licence, executed on your own device through TensorFlow.js.

Why it works the way it does

Two things shaped it. First, your audio should not have to travel anywhere for you to get a MIDI file, so the whole pipeline — decoding, analysis, MIDI writing — runs inside your browser tab. Nothing is uploaded, and there is nothing to sign up for. Second, transcription is estimation, not truth. Rather than print an accuracy number nobody can verify, the page shows you the result before you download it: note count, pitch range, and a piano roll you can read at a glance. If it looks wrong, you know before you leave the page.

What it costs

Nothing. There is no account, no email gate, no daily limit, and no payment. Because the model runs on your device rather than on a server, there is no per-conversion cost to hand on to you.

Getting in touch

Questions, bug reports and corrections are welcome — use the contact page. If a file converts badly and you can share it, that is the fastest way to make the tool better.