When you convert JPEG to WebP, you're converting data in a lossy format to another lossy format. Of course you're going to get good JPEG to WebP compression, be

When you convert JPEG to WebP, you're converting data in a lossy format to another lossy format. Of course you're going to get good JPEG to WebP compression, because you're starting with a low-quality source. If you start with a lossless image (RAW/PNG/TIFF/etc.) instead of a JPEG, you might get different results.