A Music Visualizer for the Web
Choose your Input
Use your microphone as the input.
Use your speakers as the input.
Choose your Mode
Select a preset
suiting your music choice.
Use random values
and customize them to your liking.
To use your speaker output as an input for the visualizer, you need to install and set up a virtual audio mixer.
On Windows, you can use VoiceMeeter
with VB Audio Virtual Cable
On Mac, BlackHole
seems to be a good option.
Once set up, you need to make sure that your browser recognizes the correct microphone input (in the case of VoiceMeeter, "VoiceMeeter Output").