What File Type Should I Use to Submit My Images? For optimal printing, your image files should be submitted in JPEG (.jpg or .jpeg) format with MAXIMUM quality. To order Photographic Prints, click here. Related articles What File Resolution Should I Use for Photo Prints? What Type of Paper is Used for Photo Prints? What Company Name is Printed on the Back of the Photo Prints and Packaging? How are Acrylic Pro Prints Produced? Do You Have Any Tutorials on How to Use Your Builder Screen?