If you prefer not to install large software or need a quick web-based fix, several other free options exist: How to download DWG TrueView - Autodesk
To convert a modern AutoCAD DWG file to an older version, the most reliable official method is to use , which is a free, high-performance file converter and viewer provided by Autodesk. Official Solution: Autodesk DWG TrueView autocad file converter to older version (free download)
How to save an AutoCAD drawing to a previous or older file format If you prefer not to install large software