How to Convert Audio to MIDI Free (In Your Browser)

By HOPEX · Updated July 2026

You hummed a melody into your phone, found an old sample, or want to reuse the topline from a demo — as MIDI, so you can change the sound, fix the notes and reshape the groove. Here’s how to get from audio to editable notes for free.

Use a browser-based converter

Our free Audio → MIDI converter listens to your file, detects the pitches, and shows the result on a live piano roll you can preview before downloading the .mid file. It runs entirely in your browser — your audio is never uploaded, so unreleased ideas stay yours.

What converts well (and what doesn’t)

Great: single-note melodies — hummed lines, sung toplines, lead synths, basslines, whistling. Tricky: chords and full mixes. Pitch detection works on one note at a time, so feed it isolated, monophonic material. If you only have a full track, converting a section where the melody is exposed works far better than the whole song.

Tips for cleaner MIDI

Record close to the mic with minimal background noise.
Sing “da” or “ta” instead of humming — harder note starts detect better.
Stay steady on pitch; slides and vibrato become extra notes.
After converting, quantize lightly in your DAW and delete stray short notes.

From MIDI to a finished idea

Once the melody is MIDI, drop it on any instrument in FL Studio — and if you need chords underneath it, the Générateur de motifs MIDI writes progressions in the same key (find that key with the Détecteur de tonalité et de BPM IA if you’re not sure).

Convert audio to MIDI free →Live piano-roll preview, .mid download, 100% in your browser.

Questions fréquentes

Can I convert audio to MIDI for free?

Yes — the HOPEX AI Audio to MIDI converter is free, runs in your browser, and exports a standard .mid file that opens in FL Studio, Ableton or any DAW.

Does audio to MIDI work on chords or full songs?

Monophonic material (one note at a time) converts far more accurately. For chords or full mixes, convert an exposed melody section instead.

Is my audio uploaded when I convert it?

No. The HOPEX AI converter analyzes the audio locally in your browser, so the file never leaves your computer.