High Efficiency Image File Format (or “HEIF”, for short) is Apple’s new format for storing stills on your phone. With the goal of replacing JPG as the new image standard, it claims to save up to 50% of storage space for your photos. Until now, though, the only way you’ve been able to view them or really do anything with them is using an iOS 11 device or a mac.
That’s starting to change, though, with the release of Zoner Photo Studio X, which brings HEIF compatibility to Windows. It’s still labelled as “experimental”, and there are some specific software requirements, so it’s not available to everybody. But, it’s a start.