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CAD Assistant vs Autodesk Viewer: catalog facts
CAD Assistant	Autodesk Viewer
Free Free for personal and commercial use.	Free Free to use in the browser.
macOS, Android	Web
Opens STEP, IGES and other CAD formats Converts between 3D formats	Opens many CAD formats, including DWG, RVT, STEP and SolidWorks files No software to install
Viewer and converter only, not a modelling tool Closed source despite being built on the open OCCT kernel	Requires a WebGL-capable browser A viewer only, not an editor
Downloadable app	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Works offline	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.