aside from all this, the vast majority of photos from modern smartphones will be saved as JPG. if you are then converting that jpg to png, you aren't going to increase the quality.

bored of this conversation now, have fun wasting your own bandwidth and disk space. just please don't get into web development

idk what you mean by "portable", but yes, PNGs are lossless. this is typically a bad thing for photographs - when you are transmitting photographs on the internet in 99.9% of use cases doing so losslessly is a waste of bytes. it is better to compress, to save bandwidth and make things load faster. and even your own disk space.

my collection of photos is ~500GB. it would be more than double this if they were all PNGs.

don't use lossless for photos.

> I only use .png nowadays.

??? why? this is a terrible idea. PNG is not a suitable format for photographs - it doesn't compress them well, the file size will be massively bloated.

use webp.