AudioMass is a free, open source, web-based Audio and Waveform Editor. It runs entirely in the browser with no backend and no plugins required! Tips: Please keep in mind that most key shortcuts rely on the Shift + key combo. (eg Shift+Z for undo, Shift+C copy, Shift+X cut... etc )
AudioMass lets you record, or use your existing audio tracks, and modify them by trimming, cutting, pasting or applying a plethora of effects, from compression and paragraphic equalizers to reverb, delay and distortion fx.