XnView Software

At some resolution, you will got 0 byte
try this picture, u will got 0 byte :P

https://i.imgur.com/C8a9uYC.png

convert to heic will change the color.

here's the comparison:

https://i.imgur.com/A4XtdfE.png

try it yourself, green and red color will be changed.

https://i.imgur.com/3QBdubX ...