  In recent years, a bag with image and video compression formats has been
torn. However, most of them are focused on lossy compression and only
marginally support the lossless mode. In this paper, I will focus on lossless
formats and the critical question: "Which one is the most efficient?" It turned
out that FLIF is currently the most efficient format for lossless image
compression. This finding is in contrast to that FLIF developers stopped its
development in favor of JPEG XL.
