It was kind of like that. They were asking whether copying jpg files and compressing/decompressing them into and out of zips worsened their quality.
I don’t have the post’s text but this was my answer:
As others have pointed out simply copying the file, or compressing it in a zip will never ever change it. It is fundamentally the exact same file. If you load it up in a photo editor (not just viewer), and resave it from there, then it might lose more quality.
Renaming it to png changes essentially nothing about it. Most software will still recognize that it’s a jpg, and open it up as such. If they tried to open it as a png, they would fail. If you load the jpg into a photo editor and save it as png from there then it will actually change formats. But there is no point in doing this. The png’s file size will be much larger, and you can not get any of the quality back that you lost when initially saving it as a jpg.
It was kind of like that. They were asking whether copying jpg files and compressing/decompressing them into and out of zips worsened their quality.
I don’t have the post’s text but this was my answer:
The post was prior to deletion renamed to:
so that’s cool…
Yeah thanks for the help (i am the guy who created the post)