Digital Trends: JPEG vs. PNG: Which image-saving format is the better one to use?. “In the world of digital imaging, there are two image formats that prevail above all else: JPEG (or JPG) and PNG. At first glance, a single image shown in both formats might seem identical, but if you look close enough, and dig into the data, there is quite a difference between the two images. Further, each format is designed to be used in specific ways to make the most of its strengths and weaknesses. To help you better understand the differences, we created this guide on JPEG vs. PNG to help you know when to use which format.” Good overview.