| filename extensions | art-335 |
| hmk | |
| TechTarget file types | art-336 | HMK-Hallmark-Card-Studio-File-Creative-Home |
| TechTarget file types | art-336 | HMK-Hallmark-Card-Studio-file-Header |
| English | eng-000 | Hallmark Card Studio File |
| English | eng-000 | Hallmark Card Studio file Header |