A QCT file contains a map created by Memory-Map, a cross-platform GPS navigation program. It stores information about a map, which may include city locations, roads, elevation data, and marked routes.

The QCT file format is the main file type associated with Memory-Map. QCT files may be saved and opened using Memory-Map. Other programs, including Psyberia AlpineQuest, can also be used to open QCT files. Memory-Map is available for Windows, macOS, Android, and iOS. NOTE: QCT maps are typically located in the C:Maps or C:Maps_<version> folder in Windows.