AutoCAD DWG TrueView (free from Autodesk) – cannot open .zw1 directly.
But you can:
✅ Works if the file is structurally DWG. zw1 to dwg converter
If you have a .zw1 file and need a .dwg: AutoCAD DWG TrueView (free from Autodesk) – cannot open
Sometimes .zw1 is just a renamed .dwg backup. ✅ Works if the file is structurally DWG
Steps:
✅ Works if the file wasn’t compressed or encrypted.