MP3 to MIDI Converter

How to Convert MP3 to MIDI

1. Choose your audio

   To convert an MP3 file to MIDI, upload or drag in one file. A clean piano, guitar or vocal recording works best.

2. Convert in your browser

   To change MP3 to MIDI, the model detects note pitch, timing and strength. Keep this tab open while it converts the MP3 into MIDI.

3. Download your MIDI

   Save the .mid file and open it in your DAW or notation editor to adjust the notes.

Supported Formats and Limits: WAV, M4A, FLAC to MIDI

This MP3 to MIDI converter accepts MP3, WAV, OGG, M4A, AAC, FLAC and WMA files, plus the audio track in MP4 and MOV videos. For MP4-specific limits, container vs codec and failure cases, see MP4 to MIDI. Encrypted, DRM-protected, damaged or unusual codec variants may not decode.

For formats, accuracy and free vs paid answers in one place — including voice and humming — see the audio to MIDI converter page.

Each file can be up to 50 MB (50,000,000 bytes) and 3 minutes long. These are this tool's limits to keep memory use manageable, not limits of the MIDI format. Processing speed depends on your device. There is no daily quota.

The output is a standard MIDI file containing detected notes on one instrument track. Chords can produce simultaneous notes, but this is not instrument separation, sheet-music generation or an exact reconstruction of a finished song. No notes detected means no download—not a made-up result.

Powered by Spotify's Basic Pitch. The model and audio decoder load from this site when needed. Audio is processed locally and is not sent to an external API. No account or saved conversion history. See the privacy policy for website analytics.

What This Free MP3 to MIDI Converter Returned in Our Test

We ran a generated four-note melody (C4, E4, G4, C5) through this audio to MIDI online tool as an MP3. The status line read melody.mid · 4 notes · 4.0 seconds: the file name, how many note events were written, and the length of the audio that was analysed. The downloaded MIDI held exactly those four pitches, starting at 0.000 s, 0.905 s, 1.811 s and 2.695 s, each about 0.77–0.79 s long. The full event list and the WAV comparison are in the same-melody test.

The MIDI is written at a fixed 120 BPM. That does not change how it plays, but it matters if you want notation: see audio to sheet music for the score this test produced and how setting the real tempo cleaned it up.