Starting with iOS 11, iPhones have saved pictures in HEIC file format by default setting. HEIC — High Efficiency Image Format — is a great format: it creates pictures with approximately half the storage of comparable JPEGs while keeping great image quality.
However there is a major catch. HEIC is an Apple-centric file type not broadly compatible beyond the Apple environment. Windows PCs, non-Apple phones and most online services do not support HEIC images without special programs.
Changing HEIC to JPG is the necessary step making iPhone pictures compatible everywhere. Common scenarios needing conversion are sending iPhone photos to non-Apple users, adding images to websites incompatible with HEIC.
People with Macs have the easiest process. Simply open the HEIC file in Preview, select File, then Export and select JPEG as the file type.
On Windows, browser-based tools manage HEIC to JPG here converting with no software installation. Add the HEIC file and save the converted JPG.
Try alljpgconverters.com offering a totally free online HEIC to JPG solution without download required.