File Extension PMJ File Format 3D Digital Scanner File PMJ stands for 3D Digital Scanner File. This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question Video: Sony unveils 3D-360 degree display - Great for looking at Fuji to release cheap 3D camera - oh the possibilities Who invented the scanner?