Crowbar is the industry standard for handling Source Engine assets.
Open Crowbar, go to the "Decompile" tab, and select the .mdl file (ensure the .vvd is in the same folder). vvd to obj top
Converting Source Engine models is a multi-step process because a .vvd file is only a piece of the puzzle; it requires the corresponding .mdl file to define the model's skeleton and structure. Crowbar is the industry standard for handling Source
Before choosing a tool, you must determine the origin of your file: go to the "Decompile" tab
These are binary files containing vertex, normal, and tangent data for game models. They are almost always found alongside .mdl and .vtx files.