[JayXon]

shameless plug: you can throw a windows pe file (exe, dll, etc.) at leanify and it will remove all the garbage in pngs in that pe file (even those embedded pngs in high res ico file in pe file), and it will also optimize png compression with zopfli. But don't use it on windows system files because modifying those pe files will definitely break the digital signature.

[withinrafael]

Author here -- Very neat, saves writing another tool!