MP3 to MIDI

MP3 to MIDI Converter is a free online tool that uses AI to transcribe MP3 audio into editable MIDI files—all directly in your browser.

How it works

Upload an MP3 file, choose the closest audio type (voice, piano, guitar, bass, another solo instrument, a full song, or Not Sure), and the AI transcribes the notes. The entire process runs locally in your browser—your audio stays on your device and is never uploaded to a server.

Key Features

• AI-powered note detection — Detects pitch, timing, duration, and velocity, including chords and polyphonic audio

• 100% browser-based — No uploads, no servers, no signup required

• Built-in piano roll editor — Move, resize, join, or delete notes with undo, redo, and optional grid snapping

• Preview before downloading — Compare the original audio with the synthesized MIDI playback

• Standard MIDI output — Download a .MID file and continue editing in any DAW or MIDI editor

• Works on desktop and mobile — Use it in any modern browser

Limitations

• Supports MP3 files up to 20 MB and 3 minutes

• Works best on solo instruments or clear melodies; full songs are experimental and may need cleanup

• Does not export PDF sheet music, MusicXML, tabs, or separate instrument tracks

Who it's for

• Musicians and producers who want to transcribe audio into their DAW (Ableton Live, Logic Pro, FL Studio, etc.)

• Music learners who want to see the notes of a song

• Anyone who needs a quick, private, and free MP3 to MIDI conversion