Files with the ITHMB extension contain image thumbnails used by Apple mobile devices – the iPhone and the photo-compatible iPod. The files are collections of photos stored on your media device.

Thanks to the use of ITHMB files, it is possible to quickly view graphic files on the devices, as well as manage them and label them with appropriate programs. ITHMB files can be converted to other formats using programs such as PicsAid and File Juicer.