CSS Mask Example
First image is the original 220+ kb PNG file. Second is a ~34kb JPG file masked by a ~1kb PNG file. ~16% size of the original.
Mask:
Code:
selector img{ -webkit-mask-image: url("path/to/mask.png"); -webkit-mask-size: 100% 100%;
mask-image: url(“path/to/mask.png”) ;
mask-size: 100% 100%;
}