S2TC-compressed surface texture file
File type: Miscellaneous file
A .dxt3 file stores a surface texture using S2TC/DXT3 compression.
It is used by graphics and game-development software that supports compressed texture data.
File type category:
Miscellaneous file
Date updated: September 22, 2026
S2TC/DXT3 stores color data together with explicit transparency information, allowing surface textures to use less storage than uncompressed image data. The format is intended for textures used on rendered surfaces.
The file is normally an asset for a graphics application, game engine, or other software that loads compressed textures rather than a general-purpose image document. Support is provided by the software that imports or displays the texture.
Open the .dxt3 file with the graphics or game-development software that created it, or with another application that explicitly supports S2TC/DXT3 textures.
General-purpose image viewers may not recognize this file as a standalone image. If the file is part of a larger game or graphics project, use that project's asset or texture tool.
Conversion requires a graphics or texture tool that can read S2TC/DXT3 data. Such a tool may be able to export the texture to an uncompressed image format or to another texture format.
If no installed application supports this specific file, there is no reliable generic conversion method.
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