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Mayo vs Autodesk Viewer: catalog facts
Mayo	Autodesk Viewer
Free Free and open source.	Free Free to use in the browser.
Windows, macOS, Linux	Web
Converts between STEP, IGES, STL and other CAD formats Clip planes, exploded views and measurement	Opens many CAD formats, including DWG, RVT, STEP and SolidWorks files No software to install
A viewer and converter, not a modelling tool	Requires a WebGL-capable browser A viewer only, not an editor
Downloadable app	Web application
Open source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Works offline	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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