Description

MP3 to MIDI Converter is a free, browser-based AI tool that turns MP3 audio files into editable MIDI files using AI-powered note detection. No signup, no uploads to servers—everything runs locally on your device.

How It Works

The tool uses a lightweight machine-learning model that runs directly in your browser. Simply upload an MP3 file (up to 20 MB and 3 minutes), 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 model detects pitch, timing, duration, and velocity, including chords and polyphonic audio. It works best on one instrument at a time, such as voice, piano, or guitar.

Key Features

100% browser-based processing — Your MP3 stays on your device. No uploads, no servers, no signup required.

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

Built-in piano roll editor — Move, resize, join, or delete notes with undo, redo, and optional grid snapping—without opening a full DAW.

Preview before downloading — Compare the original audio with the synthesized MIDI playback and inspect every detected note.

Standard MIDI output — Download a standard .MID file and continue editing in any DAW or MIDI editor like Ableton Live, Logic Pro, FL Studio, or GarageBand.

Adjustable controls — Raise sensitivity for quiet notes, lower it to remove extras, increase minimum note length to remove short detections, and keep pitch bends for expressive voice or guitar parts.

Works on desktop and mobile — Use it in any modern browser without installing software.

Tips for Best Results

Use a clean recording with little noise, distortion, or reverb.

Try a short section before processing a longer MP3.

Choose the preset that most closely matches the recording.

Full songs are experimental and may need more cleanup than solo recordings.

Who It's For

Musicians and producers who want to transcribe audio into their DAW for further editing

Music learners and students who want to see the notes of a song or practice with visual feedback

Composers and arrangers who need MIDI sketches from existing audio

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

Limitations

Supports MP3 files up to 20 MB and 3 minutes

Works best on solo instruments or clear melodies; full songs are experimental

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

Privacy & Security

Your audio never leaves your device. Only the AI model and normal site assets are downloaded. No uploads, no servers, no privacy concerns.

https://mp3tomidi.io/