DWG FastView offers a surprisingly robust portable version that mimics 80% of TrueView’s functionality for viewing and basic markup. It does not convert file versions (TrueView’s killer feature), but for pure viewing, it is superior on the go.
If "portable" means "no click-through installation," you can run a silent install from a USB drive. dwg trueview portable
⚠️ : Since Autodesk does not endorse portable versions, you may instead consider DWG FastView or Bentley View (official portable CAD viewers) as legal alternatives. DWG FastView offers a surprisingly robust portable version
Toggle layers on or off, change colors, and isolate specific design elements. Official, Free Alternatives to Portability but for pure viewing