https://www.theverge.com/2018/11/13/18091938/google-labs-squoosh-image-editing-web-app-online-chrome

Nicely displaying high-quality images without sacrificing load time can be a constant dilemma. Now, an experimental web app from Google called “Squoosh” offers a quick and easy way to get the best of both worlds, via 9to5Google.

It’s a pretty simple app to use: you can drag and drop an image of your choosing into the tool, at which point, you can pick from compression standards including MozJPEG, OptiPNG, and Google’s own WebP. A small slider lets you quickly adjust the level of compression, and you’ll also see a running total of how large the resulting file is expected to be. A second slider can be pulled across the image to let you easily see the effects of the compression. There are more advanced options available, but we were able to find a pretty decent balance between image size and quality without them.