Well of course, JPEG artifacts aren't necessarily going to be easier for png to compress. You need to make modifications designed for png's algorithm. There are

Well of course, JPEG artifacts aren't necessarily going to be easier for png to compress. You need to make modifications designed for png's algorithm. There are some tools that do this: https://pngmini.com/lossypng.html https://pngmini.com/lossypng.html https://pngquant.org/ https://pngquant.org/ https://tinypng.com/ https://tinypng.com/ The resulting png's are much smaller. Though not necessarily as small as JPEG, it's in the same ballpark.