APNG (Portable Network Graphics)

The APNG format is an extension of the well-known PNG graphics format, with the addition that, as well as being able to store the same compressed image data as regular PNG files, it can also store high-quality animations.

The ability to store animations in a higher quality than the traditional animated GIF format makes APNG files a great choice for storing animations in a modern format that has support amongst all the major web browsers.