To convert an FBX 3D model, use 3D software (like Blender) or online tools—import the FBX file, select your target format (e.g., OBJ, STL, glTF), adjust basic settings (e.g., preserving textures or geometry), and export.
Ensure the tool supports your FBX version and desired output to avoid compatibility issues (e.g., older FBX files may not work with newer tools).
For beginners, Blender (free) is ideal—it has a straightforward import/export workflow that’s easy to learn without complex setup.