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

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

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