"Lossless" and "lossy" are both types of compression. A zipped file is lossless, because when you unzip it, every original bit is still there from the original file. A JPEG, however, is a "lossy" file ...
You can convert a JFIF file to JPG, though the two formats are nearly identical, and most software will open a JFIF file as a ...
You can convert HEIC files to the PNG format using a few different methods. Here's how to convert HEIC to PNG on an iPhone, ...