Unmix · StemStudio — free online stem separation

Vocals and backing track,
right in your browser.

Make karaoke tracks, pull acapellas, or split instruments — free and no sign-up.
No upload — everything runs inside your browser and your audio never leaves your device.

New separation

Pick a file to start

Drag & drop an audio file

or click to choose

MP3, WAV, M4A, AAC, FLAC, OGG, video files (MP4, MOV, AVI, WebM)

Separation mode

Vocal extractionAI · high quality · PC recommended
AI 6-stemHigh accuracy · PC recommended

Parts

Vocals
ON
Instrumental (Karaoke)
ON

Separates vocals and backing track with an AI model (htdemucs family). The model is large, so a PC with a modern browser is recommended; on constrained devices it switches automatically to a lighter AI model (both are genuine AI separation).

What you can do

Nothing gets uploaded

The file you pick is processed right inside your browser. Nothing is ever sent to a server.

No sign-up needed

No account, no install. Just open the page and choose a file.

For karaoke and transcribing

Remove vocals to make a backing track, or isolate just the vocals. Great prep for practice or production.

Preview and adjust before export

Try each part’s volume and mute right there, then save only what you need as WAV.

What is 6-stem?

It means automatically splitting one song into six parts. Here is what each one is:

VocalsThe sung/lead voice part.
DrumsPercussion such as kick, snare and hi-hats.
BassThe low-end string/bass part.
GuitarElectric and acoustic guitar.
PianoKeyboard/piano parts.
OtherBacking elements that don’t fall into the categories above.

How to use

1
Choose a file

Drag & drop an MP3, WAV, M4A, FLAC or video, or click to select.

2
Pick a mode

If vocals + backing track is enough, choose "Vocal extraction"; to split by instrument, choose "AI 6-stem".

3
Listen and export

Play and adjust each part, then save just what you need as WAV.

Frequently asked questions

Is it really free? Do I need to sign up?

It’s completely free with no account needed. Just open the page and pick a file.

Is the song I choose sent anywhere?

No. All separation happens entirely inside your browser.

Which file formats are supported?

MP3, WAV, M4A, AAC, FLAC and OGG, plus the audio track of video files.

What’s the difference between "Vocal extraction" and "AI 6-stem"?

Both use the same family of AI model (htdemucs); they differ in how many parts you get. Vocal extraction gives two (vocals and backing track); AI 6-stem gives six (vocals, drums, bass, guitar, piano and other). If you don’t need a specific instrument, vocal extraction is plenty.

Does the processing change by device?

Vocal extraction automatically picks between two AI models by device (a high-quality model on PC, a lighter one on phones). Both are genuine AI separation — we never use a low-quality "simple" method. In the rare case neither can load, we ask you to retry on a good connection or a PC.

Please only use audio you own the rights to, or that you are otherwise permitted to use.