CAD Assistant

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Score7.3

Rank#2 of 30

PriceFree

Free planYes

Runs onAndroid, iOS, Linux, macOS, Windows

Summary

CAD Assistant is a free, offline 3D CAD viewer and converter for personal and commercial use, available on Windows, macOS, Linux, iOS, and Android. It opens CAD and mesh files including STEP, IFC, IGES, BREP, glTF, JT, PLY, STL, OBJ, 3DM, DXF, SAT, and Parasolid XT. You can browse assembly trees, show or hide components, and inspect properties such as area, volume, and centroid. For PLY meshes, it offers wireframe, shaded, and shrink views, with color or scalar values mapped to mesh elements or nodes. Desktop versions include a GPU-accelerated path-tracing renderer for screenshots. The maker says processing happens locally, without a server connection. Imports provided by commercial Open Cascade components restrict model export and conversion, though the maker says models keep their complete structure without size limits. Large files may take time, low-range GPUs may be slow, and scenes with several million triangles may be stopped by the system. The listed latest version is 1.6.0, dated 2021-10-05.

Who it is for

It suits people who need to inspect CAD or mesh files across desktop and mobile devices, including for commercial use. Note that commercial-component imports restrict export and conversion.

What is good

Free for personal and commercial use
Runs locally without a server connection
Opens a broad range of CAD and mesh formats
Inspects assemblies and geometric properties
Desktop versions include path-tracing rendering

What to know first

Commercial-component imports restrict export and conversion
Large files may take time to process
Low-range GPUs may be slow
Very large scenes may be terminated

Verdict

CAD Assistant covers file viewing, conversion, assembly inspection, and mesh analysis without requiring a server connection. Check the export restriction and device limits if you plan to work with commercial-component imports or large scenes.

CAD Assistant plans and pricing

All plans

CAD Assistant Free Free for personal and commercial use · commercial import components restrict model export/conversion opencascade.com · 3 Oct 2026

Compared on 3D file converter software

Free plan: Yesopencascade.com
Format scope: mixedopencascade.com
Supported platforms: Windows, macOS, Linux, iOS, Androidopencascade.com

Facts

Purpose: CAD Assistant is an offline 3D CAD viewer and converter for personal and commercial use.opencascade.com · 3 Oct 2026
File formats: It supports CAD and mesh formats including STEP, IFC, IGES, BREP, glTF, JT, PLY, STL, OBJ and 3DM, plus DXF, SAT and Parasolid XT.opencascade.com · 3 Oct 2026
Model inspection: Users can browse assembly trees, show or hide components, and inspect product and geometric properties such as area, volume and centroid.opencascade.com · 3 Oct 2026
Mesh analysis: It can display PLY mesh data in wireframe, shaded and shrink modes, with color or scalar quantities mapped to mesh elements or nodes.opencascade.com · 3 Oct 2026
Rendering: Desktop versions include a GPU-accelerated path-tracing renderer for photo-realistic screenshots.opencascade.com · 3 Oct 2026
Integrations: The application integrates with operating-system file associations so compatible apps can open relevant files in CAD Assistant; saved model images can be attached through a mail client.opencascade.com · 3 Oct 2026
Offline and local use: The maker’s brochure says no server connection is needed and that processing is performed locally on the device.opencascade.com · 3 Oct 2026
Commercial import limit: Imports provided by commercial Open Cascade components disallow model export or conversion, while the maker says models retain complete structure without model-size limits.opencascade.com · 3 Oct 2026
Device limits: The maker warns that large files may take time, low-range GPUs may be slow, and scenes with several million triangles may be terminated by the system; it says files under 50 MB are generally safe on most devices.opencascade.com · 3 Oct 2026
Support: The product page directs users to forums for comments and invites bug reports, questions and suggestions through its contact options.opencascade.com · 3 Oct 2026
Warranty: The application is provided as is, without warranty of any kind.opencascade.com · 3 Oct 2026
Current listed release: The product page lists version 1.6.0 dated 2021-10-05 as the latest version.opencascade.com · 3 Oct 2026