MP3 to MIDI

MP3 to MIDI Converter is a free online tool that turns MP3 audio into editable MIDI files using AI-powered note detection.

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, and duration, 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