HEIF Image Extensions
Lets Photos and File Explorer open HEIF files. iPhone photos also need the HEVC Video Extensions, which Microsoft sells separately for about a dollar.
This site is the quick answer. For opening HEIC files straight from File Explorer, converting whole libraries, or editing, these are the programs we'd point a friend to.
None of these links pay us. If that changes, the link will be labelled.
Lets Photos and File Explorer open HEIF files. iPhone photos also need the HEVC Video Extensions, which Microsoft sells separately for about a dollar.
Adds thumbnails and a right-click "Convert to JPEG" to File Explorer, without a store purchase.
Drag a folder in, get JPEG or PNG out. A good fit for thousands of files at once.
Batch converter with resize, rename and watermark steps you can save and reuse.