.UEXP File Extension

A developer creating a video game with Unreal Editor can cook assets they're using in the game, which strips out some pre-processing data. When a developer does this, the asset is transformed from a single UASSET file into a set of three files: a UASSET file, a UEXP file, and a UBULK file. These files are often saved in a PAK archive.

The UEXP file contains the data used to load and show the asset in-game. The UASSET file contains the asset's file header, and the UBULK file contains the asset's bulk data.

To open a .uexp file, you need compatible software that supports this file format.