Many digitization projects of cultural heritage are implemented worldwide. Those projects testify about the efforts being made by the heritage institutions. Theoretical chapters defines basic terminology used in the thesis. Thesis in its theoretical chapters focuses on the precise definition of terms of cultural heritage, local cultural heritage in public libraries and the objectives and purpose of digitization of cultural heritage. Special attention is directed to the public libraries and the role they play in relation to cultural heritage, emphasis is placed on the local cultural heritage, its digitization in public libraries and on postcards - their importance and main characteristics. In the research, main focus is placed on the digital collections of postcards, essentially related to the local cultural heritage and the preservation of local history. Considering that the main objectives of creating a digital collection are fulfilled only when they are actively used, the main focus of research is directed on the ways of presenting collections to users. The study included 11 digital collections of postcard of Croatian and foreign public libraries, in which special attention is focused on user interfaces. Through the analysis of interfaces of digital collections, strengths and weaknesses of the analyzed interfaces are identified, in some interfaces innovative ways of presenting the material are noticed, but it is not evident in all collections. In order to make better design solutions for digital collections, examples of good practice can serve as a guide in future projects. Professionals working in heritage institutions must follow the development of communication technologies and tools and think over the ways in which they can be implemented in their work area. In the representation of digital heritage there are plenty of opportunities where they can exploit the creative potential of technology.