By default, all software supports multiple file extensions. Hallmark Card Studio supports at least 1 different file extensions. The basic files that Hallmark Card Studio supports are .HMK. However, not all of the extensions listed on the list are always used to save the effects of work in Hallmark Card Studio. Very often, files with such extensions are used as source data files used by Hallmark Card Studio.
Hallmark Card Studio can be used to convert file formats between the file extensions listed below. You can open a file with one of the file extensions below via Hallmark Card Studio and try to save it in another file format, also supported by Hallmark Card Studio.