Once you receive the email with the link, feel free to share it with anyone until the link automatically expires after 30 days. Subsequently, you can wait for your file to be uploaded for viewing, or email yourself a link to view your design once the file is ready. To get started, drag and drop your CAD file on to the hard to miss blue plus sign. Simply visit in your web browser (Chrome, Firefox or another browser that supports WebGL 3D graphics) and upload your CAD file for free! Supports Over 50 Different File Formats The best part about the A360 Viewer is you don’t have to download or install any software, or create a login and password to use it. With its straightforward drag and drop interface, it’s child’s play when it comes to uploading and viewing your CAD files. Autodesk recently introduced their “A360 Viewer”, which is a free CAD file viewer that supports over 50 different file formats. However, there is such a thing as a free online file viewer.

The popular adage states that there is no such thing as a free lunch.

Autodesk stl viewer