CAD Assistant
Open Cascade SAS
Download from the vendor
occt3d.com
A program for opening, inspecting and converting CAD and mesh files. It reads STEP (including AP242), IGES, BREP, glTF, OBJ and VRML, plus PLY, FBX, 3DS and 3DM, and saves to STEP, IGES, glTF, OBJ, PLY, STL and BREP. It also opens IFC, JT, ACIS, DXF and Parasolid files for viewing only. Suited to engineers who receive models in neutral formats and need to check them or convert them for printing and presentation. There are versions for Windows, macOS and Linux as well as mobile. Limitation: the latest version was released in 2021 and it is no longer updated.
Ratings & Reviews
| Licence type | Completely Free |
|---|---|
| Licence terms | Free for personal and commercial use, with no registration, and provided as is without warranty. The full licence terms are included in the installation package. The latest version dates from October 2021; the software is provided as is, without warranty. |
| Platforms | Linux, macOS, Windows |
| Engineering field | Architecture, Civil Engineering, Mechanical Engineering |
| Tool type | CAD & Drafting, 3D & Visualisation |
| Vendor site | occt3d.com |
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Last verified: 2026-10-15