You can access Squoosh online through its easy web page and when loaded, it can also work offline in the browser. The web-based app is relatively easy to use: it supports a variety of web formats like JPG, MozJPEG, WebP and PNG. It also shows you a 1: 1 visual comparison of the original image and the compressed version, to illustrate the differences. When you have finished editing, just click download to save the image locally. Squoosh is an open source tool, so if you're interested in your inner work, you can cast your code on GitHub.
Yet, the irony of Google obsessed over load times while ignoring how Chrome's inflated is not lost to many users. Older places are the great G also in campaign to turn their mobile web pages quickly into a web standard ̵