Question: are my icloud photos full resolution?
Answer: Your photos and videos are stored in iCloud exactly as you took them. All of your images are held in their original formats at full resolution – HEIF, JPEG, RAW, PNG, GIF, TIFF, HEVC and MP4 – as well as special formats you capture with your iPhone, like slo-mo, time-lapse, 4K videos and Live Photos.