Opening a SolidWorks file in a 3D viewer can be very useful for visualizing and collaborating on CAD designs. Here's how to do it:

1. Export the SolidWorks file: Start by saving your SolidWorks file in a format that can be opened in a 3D viewer. Common file types that are compatible with 3D viewers include STL, OBJ, and STEP.

2. Choose a 3D viewer: There are many 3D viewer programs available, both free and paid. Some popular options include MeshLab, SketchUp Viewer, and Glovius. Choose the one that best suits your needs and install it on your computer.

3. Open the 3D viewer: Once you have the 3D viewer installed, open the program and look for the option to import a file. Select the SolidWorks file that you exported in step 1.

4. Explore the model: The 3D viewer will now display your SolidWorks file in a 3D environment, allowing you to rotate, zoom, and pan around the model. Some viewers also offer advanced features like measurements, annotations, and sectioning.

5. Share and collaborate: With the file open in the 3D viewer, you can easily share it with others for feedback and collaboration. Some 3D viewers even offer cloud-based sharing options for easy access from anywhere.

By following these steps, you can open your SolidWorks file in a 3D viewer and take advantage of the benefits that come with better visualization and collaboration. Whether you're working on product design, architecture, or any other type of CAD project, using a 3D viewer can greatly enhance your workflow and communication with others.