Its a simple user interface to create tokens and to chat with LiveKit. It's not so secure, so only for testing :P.
You can view and copy tokens to develop.
Make sure your livekit is running see: https://docs.livekit.io/guides/getting-started
export LIVEKIT_API_KEY="yOuREApiKEY"
export LIVEKIT_API_SECRET="YourSecrET"
npm i -g livekit-tokenkit
tokenkit
https://zoutepopcorn.github.io/livekit-tokenkit/
You can also clone this git and run npm run serve
in the client folder and edit the page yourself :D.