There's this one too, it runs 100% in-browser and you can apply basic effects like normalization/compression as well, and the trimming tools are nice https://soundslice.app/

Hi, I make that site! We don't have any "basic effects like normalization/compression," so I think you may be mistaking us for something else?

Soundslice is oriented around sheet music that's synced with audio. So while we have a few audio-processing features (basic cropping, slowdown and fine-grained pitch correction), that stuff is all secondary to the notation aspect.