File Extension ITHMB File Format Apple iPod / iPhone Media File ITHMB stands for Apple iPod / iPhone Media 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 RIP: the death of the MP3 player Aiptek Mobile Cinema i5OS (RRP: £219) Does this not make the UK's Chief Rabbi a hypocrite?