Starting with iOS 11, iPhones save pictures in HEIC file type by standard. HEIC — Apple's HEIC format — is highly efficient: it generates pictures with about half the storage of comparable JPEGs while keeping great image quality.
However there is a major problem. HEIC is an Apple-specific format not widely supported outside the Apple environment. Windows PCs, non-Apple phones and most online services cannot open HEIC photos without special programs.
Changing HEIC to JPG is the critical process that makes iPhone pictures universally shareable. Frequent cases needing conversion involve transferring images to non-Apple users, posting pictures to online platforms that do not accept HEIC.
Mac users have a simple process. Just open the HEIC image in Preview, go to File, apple heic to jpg then Export and choose JPEG as the format.
On Windows, online conversion tools manage HEIC to JPG converting without any downloads. Select the HEIC photo and download the resulting JPG.
Try alljpgconverters.com offering a 100 percent free web-based HEIC to JPG tool with no download required.