Convert X (DirectX) to OBJ Online — Legacy to Universal Format

No. OBJ does not support animation. Skeletal animation data from the X file is discarded. Only the static mesh in its bind pose is converted. For animated output, convert to GLB instead.

Yes. X format materials are converted to OBJ's MTL (Material Template Library) format. Basic properties (diffuse, specular, ambient) transfer cleanly. Texture references are maintained in the .mtl file.

Yes. Blender has excellent OBJ import support (File > Import > Wavefront OBJ). The geometry, UV coordinates, and materials will be available for editing.

The converter outputs an OBJ file and a companion .mtl file. Keep both files in the same folder. When importing into Blender (File > Import > Wavefront OBJ), Blender automatically reads the .mtl file and applies materials. In Maya, use File > Import and select the .obj file — Maya also auto-loads the .mtl. If textures are missing, place the original X format texture files in the same folder as the OBJ and MTL.

X format Frame hierarchy creates multiple named groups in OBJ. In Blender: import the OBJ, select all objects in the scene (A), then Join (Ctrl+J) to merge into one mesh. In Maya: import, select all meshes, then Mesh > Combine. In 3ds Max: select all, then Group > Collapse. After merging, you may want to weld vertices (Blender: Mesh > Merge > By Distance) to remove duplicate vertices at seams.

Text-format X files and OBJ files are similar in size since both are ASCII text. Binary X files are typically 30-50% smaller than the equivalent OBJ. A 5MB binary X file might produce a 7-8MB OBJ. The companion .mtl file is usually tiny (a few KB) regardless of model complexity.