You get access to premium models that you can purchase for a particular fee. Marketplaces are websites that let you buy and sell STL files or 3D models. Most of the websites mentioned in this list are repositories. Depending upon the particular website, you might need to create an account to download these files. These files are free to download for anyone. We’ve sorted out all the websites in three different categories: Repositories, Marketplaces, and Search Engines.Ī repository is a place where you can get a large collection of free STL files. To get the full benefit of this list, it helps to understand the differences between the various websites.