PhotoCD is a digital image storage format developed by Kodak that allows photographs to be stored at multiple resolution levels on a single CD. After film processing, a lab can scan the negatives and transfer up to 100 images onto one PhotoCD, with each image saved in five different resolutions. When opening an image, users can select the resolution they need for printing, editing, or display.
PhotoCD was an early solution for photographers to digitize film images efficiently, offering flexible access to high-quality scans while preserving the original negatives. Though largely replaced by modern digital formats, it played an important role in bridging traditional film photography and digital workflows.