"Make this photo under 100 KB" is one of the most common things people need from an image tool, and one of the few things almost no image editor exposes directly. Photoshop gives you a quality slider. cwebp gives you -q .
Source: [Dev.to](https://dev.to/textmachine/compressing-an-image-to-an-exact-file-size-in-the-browser-12ha)