CAD Assistant review
A free, broad-format converter for engineers working across desktop and mobile platforms.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
CAD Assistant is a free offline application for viewing and converting 3D CAD and mesh files. It is aimed at engineers and other users who need to inspect, edit, render, or exchange 3D data across desktop and mobile platforms. The application supports CAD, mesh, BIM, and visualization formats, with import options including STEP, IGES, BREP, glTF, OBJ, and VRML. It can export supported models to formats including STEP, IGES, glTF, OBJ, PLY, STL, BREP, and XBF.
Its strongest capability is the combination of conversion and model inspection. Users can navigate assembly structures, inspect part properties, view mesh data with mapped color or scalar quantities, and use clipping planes to examine model interiors. Material editing includes PBR texture support, while desktop versions provide GPU-accelerated path-tracing rendering. This makes CAD Assistant more than a basic file conversion utility, particularly for workflows that require geometry review before export.
Platform coverage is unusually broad for a free converter, spanning Windows, macOS, Linux, iOS, and Android. The desktop applications add the published rendering capability, while the product remains useful on mobile for viewing and conversion. CAD Assistant should suit users who value offline access, broad format support, assembly inspection, and a free license for both personal and commercial work. Users seeking AI-assisted features, open-source software, or desktop rendering on mobile should choose an alternative aligned with those requirements.
CAD Assistant pros and cons
- Where it wins
- Free for personal and commercial use
- Supports CAD, mesh, BIM, and visualization formats
- Runs on Windows, macOS, Linux, iOS, and Android
- Where it doesn't
- Desktop path-tracing rendering is not listed for iOS or Android
- No AI features are included
- It is not open source
CAD Assistant fact sheet, pricing and score →
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