A DJA file is a module created by Dundjinni, a program used to create fantasy maps that can be played as adventures. It contains module information, which includes a map and an adventure.

DJA files are created when a user selects File → Save or Save as. The file can be opened by selecting File → Open in Dundjinni. The DJA file is the main file type associated with Dundjinni, along with the DJC (contains characters), DJM (contains monsters), and DJX (contains art) files. Dundjinni allows you to create maps by drawing walls and floors on a grid using a variety of tools. You can use the maps to create an adventure by adding NPCs, objects, rooms, monsters, and treasure. NOTE: DJA files are saved by default in the "Adventure" folder located in the Dundjinni root folder.