Phaze is a real-time pitch-shifter based on the the method described here, implemented as a Web Audio AudioWorkletProcessor. It supports mono and multi-channel processing.
Please note that AudioWorkletProcessors are currently (January 2020) only supported by Chrome.
Visit the online demo here, or run
git clone https://github.com/olvb/phaze && cd phaze
npm install
npm run build && npm run startand open http://localhost:8080/ with Chrome