If you're involved in 3D printing, CAD design, or any other form of 3D modeling, you know how important it is to have a reliable STL viewer for Windows. Whether you want to visualize, analyze, or edit your STL files, having the right tool can make a world of difference. Here are the top 5 STL viewers for Windows that you should consider using:

1. FreeCAD: FreeCAD is a popular open-source parametric 3D CAD modeler. It supports the STL file format and comes with a built-in STL viewer. With FreeCAD, you can not only view your STL files but also make modifications to them.

2. MeshLab: MeshLab is a powerful open-source system for processing and editing 3D triangular meshes. It offers a wide range of features, including the ability to import and view STL files. MeshLab's intuitive user interface and advanced tools make it a great choice for STL file visualization.

3. Autodesk Netfabb: Autodesk Netfabb is a professional-grade software for additive manufacturing and design. It includes a comprehensive set of tools for visualizing, analyzing, and editing STL files. While Netfabb is a paid software, it offers advanced features that are well worth the investment.

4. STL Viewer by Open 3D Model Viewer: Open 3D Model Viewer is a free, open-source software that allows you to view 3D models in various file formats, including STL. The STL viewer is lightweight and easy to use, making it a convenient option for Windows users.

5. 3D-Tool Free Viewer: 3D-Tool is a powerful 3D visualization software that comes with a free viewer for STL files. It offers features such as measurement, sectioning, and annotations, making it suitable for professionals and hobbyists alike.

No matter what your specific needs are, there's a Windows STL viewer out there that's perfect for you. Whether you're a hobbyist looking for a simple, easy-to-use viewer, or a professional in need of advanced visualization and editing tools, these top 5 STL viewers have got you covered.