If you have a stable Internet connection, you don’t even need to download software to view STL files. All of these are free to either use or download. In this article, we will be going through all the best options for opening or viewing your STL files. This makes it easy to check STL files before you load them onto a 3D printer. STL files have a small file size, are easy to share, and generally maintain the integrity of the original 3D model.Īnother huge advantage of STL files is how easily they can be viewed or opened, even if you don’t have a fancy CAD software platform. The STL file format is one of the fundamental foundations of the modern 3D printing community. 3D Insider is ad supported and earns money from clicks, commissions from sales, and other ways.