MP3 or WAV.
This browser version accepts MP3 and WAV audio files only. Other audio formats and video containers are not supported.
AUDIO → MIDI ／ FREE CONVERTER
MP3 to MIDI.
Your sound, made editable.
No account. No upload.
01
ONE FILEAdd a file
Melody keeps the strongest pitch at each moment. Auto preserves overlapping notes.
One file at a time · Up to 25 MB · 60 sec
Stays in your browser. Audio is decoded and analyzed on this device. No upload or account.
Preparing audio
02
WAITING FOR AUDIOYour MIDI
Your note map will appear here.
Choose a file to get started.DURATION—
EST. TEMPO—BPM
NOTES—
PIANO ROLL—
NOTE LISTNOTE · START · LENGTH
| NOTE | START | LENGTH | VELOCITY |
|---|
converted-audio.midSTANDARD MIDI FILE
Download MIDI Experimental note sketch. Review every note before using the MIDI.
01 AUDIO IN → 02 EDITABLE MIDI OUTMADE FOR THE NEXT TAKE
GOOD TO KNOWSimple by design.
Simple by design.
Clear about the details.
Standard MIDI, ready to edit.
Download a .mid file and open it in a DAW or MIDI editor. The preview shows detected notes, an estimated tempo, and track duration.
One file. Up to 25 MB.
Files up to 60 seconds are supported. This page converts one file at a time and does not keep a conversion history. In local 25-second tests, the solo flute produced 183 note events, the solo piano 271, and the orchestral mix 309. The solo-flute note list already contained overlapping pitches; the piano and mix also showed dense, short detections. Treat the MIDI as a rough sketch, not a finished transcription, and review every note.
Processed in your browser.
Your audio is decoded and analyzed locally by this browser. The page does not upload the selected file.
FAQ
A few useful notes.
What does MP3 to MIDI conversion do?
It estimates musical pitches and note timing from audio and writes those notes into an editable Standard MIDI file. MIDI stores note events, not the original sound.
Can I convert WAV to MIDI or other audio formats?
Yes. MP3 and WAV are supported. Other audio formats and video are not supported in this browser version.
What should I expect from the note detection?
It is experimental, not a dependable finished transcription. In local 25-second tests, the solo flute produced 183 note events, the solo piano 271, and an orchestral mix 309. The solo-flute note list showed overlapping pitches, and the piano and mix produced dense, short detections. Review and edit the MIDI note by note; these tests did not establish reliable transcription for any of the three recordings.
Do I need to sign in, and can I convert several files at once?
No sign-in is needed. This page processes one file at a time and does not save a history.