MP3 to MIDI Converter — Free, No Signup

Free, browser-based MP3 to MIDI converter with AI-powered note detection. No signup, no uploads, preview and edit in your browser.

Music Freemium

6 views 0 likes July 25, 2026

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About MP3 to MIDI Converter — Free, No Signup

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

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

Demo Video

Use Cases

Musicians & Songwriters — Quickly transcribe a melody or chord progression from a recorded idea (humming, piano, or guitar) into MIDI, then import it into your DAW to build a full arrangement. Music Producers & Beatmakers — Extract MIDI notes from audio samples, loops, or reference tracks and use them as a starting point for remixes, covers, or new productions in Ableton Live, Logic Pro, or FL Studio. Music Students & Learners — Convert a recorded piano piece or vocal exercise into MIDI to visualize the notes, analyze pitch and timing, and better understand the structure of a song. Content Creators & YouTubers — Turn audio ideas into MIDI for creating custom background music, jingles, or soundtracks without needing advanced music theory knowledge. Quick Sketching & Experimentation — Test musical ideas on the go. Upload a short MP3 (up to 3 minutes), preview the transcription, make quick edits in the built-in piano roll, and download a standard MIDI file for further refinement.