I built a free AI stem splitter that runs entirely in your browser from my iPhone

Description and use

Music Remix Studio is a free, browser‑based AI stem splitter and remix tool that runs entirely client‑side, preserving privacy and eliminating server uploads.

Problem

Free stem splitters require uploading audio to a server, exposing user content to external machines.

Outcome

The app provides a fully offline, privacy‑preserving stem splitter and remix tool that runs on mobile browsers, increasing user engagement by offering demo tracks and bilingual support.

Workflow

• Upload a track or select a demo track
• HT‑Demucs model runs in ONNX Runtime Web to split audio into stems
• Use the built‑in EQ to shape each stem
• Enter AI remix commands (e.g., "make it more EDM") to rework the track
• Export the result as a WAV file

Evidence

Everything I build, I build from my iPhone and last week I shipped something I'm genuinely proud of: a free AI music studio that runs entirely in your browser.

Source

Every free stem splitter I found had the same catch: upload your audio to someone's server and wait. Your song your work sitting on a machine you don't control, just to get the vocals separated.

Source

The core is HT‑Demucs running through ONNX directly in the browser.

Source

The whole thing is a static site hosted on Netlify. No backend. No database. No server costs which matters a lot when your budget is zero.

Source