MP3 to MIDI Converter — Transcribe Audio to MIDI Online
Upload an audio file and convert its melody to a downloadable MIDI file. Perfect for transcribing vocal lines, monophonic instruments, and lead melodies. 100% client-side — nothing leaves your browser.
How to Use the MP3 to MIDI Converter
- Upload audio — click the upload area or drag an audio file onto it.
- Configure settings — choose a pitch range and sensitivity that matches your source material.
- Convert — click Convert to MIDI. The audio is analyzed entirely in your browser.
- Review — inspect the piano roll preview and note list to verify the transcription.
- Download — save the result as a standard .mid file, ready for any DAW or MIDI player.
Why Use This MP3 to MIDI Converter
Transcribing audio to MIDI normally requires installing desktop software. This tool runs entirely in your browser using the Web Audio API and a built-in pitch detection algorithm. No uploads, no waiting, and your audio never leaves your device.
The converter works best with monophonic sources — a single melody line, a vocal take, or a solo instrument. For best results use clean recordings without heavy reverb, drums, or dense chordal accompaniment.
Frequently Asked Questions
Any format your browser can decode — MP3, WAV, OGG, M4A, AAC, and WebM audio. The output is always a standard Type-0 MIDI file (format .mid), compatible with every major DAW and MIDI player.
Accurate polyphonic transcription (multiple simultaneous notes) requires a neural network model, which is beyond a purely client-side tool. This converter tracks the dominant pitch over time, so it works best on melodies, vocals, and solo instruments. Dense chords and drums will produce approximate results.
No. All processing runs locally in your browser. Your audio file is decoded and analyzed on your own device and is never transmitted, stored, or shared.
A MIDI file is a compact musical score that stores note events (pitch, start time, duration, and velocity) rather than audio. It can be opened in any DAW — Ableton, FL Studio, Logic, GarageBand — and played back with any instrument sound.
Use Cases
Melody Transcription
Turn a hummed or whistled melody into editable MIDI notes for production or study.
Learning by Ear
Convert a solo performance to MIDI, then slow it down or loop sections to study the notes.
Remixing
Extract a lead line as MIDI and re-harmonize or re-instrument it in your DAW.
Vocal Coaching
Check the precise pitches of a sung line and see them laid out as musical notes.