--- title: CAD Assistant Reviews meta_title: 'CAD Assistant Reviews 2026: Details, Pricing, & Features | G2' meta_description: Filter reviews by the users' company size, role or industry to find out how CAD Assistant works for a business like yours. aggregate_rating: rating_value: 4.3 review_count: 2 scale: '5' date_modified: '2026-04-02' parent_category: name: CAD url: https://www.g2.com/categories/cad --- # CAD Assistant Reviews **Vendor:** Open Cascade **Category:** [CAD Viewers](https://www.g2.com/categories/cad-viewers) **Average Rating:** 4.3/5.0 **Total Reviews:** 2 ## About CAD Assistant OPEN CASCADE CAD Assistant is a viewer and converter for 3D CAD and mesh files, free for both personal and commercial use. CAD Assistant is based on open source libraries (Open CASCADE Technology, Qt, FreeType, FreeImage, etc.) and employs open formats for CAD and mesh data (STEP, IGES, BREP, DXF, SAT (ACIS), glTF, JT, PLY, STL, OBJ, 3DM). ## CAD Assistant Reviews ### 1. Good free tool to viewing CAD and migrating. **Rating:** 4.0/5.0 stars **Reviewed by:** Verified User in Online Media | Mid-Market (51-1000 emp.) **Reviewed Date:** April 10, 2023 **What do you like best about CAD Assistant?** OpenCascade is a great 3D CAD viewer with an engaging tool with user friendly interface. It is a free to use tool for individuals and could be used for commercial use too. **What do you dislike about CAD Assistant?** The team had issues with opening some new formats to be used and for editting. Also some minor lagging. Otherwise it went on smooth without major problems for using the tool. **What problems is CAD Assistant solving and how is that benefiting you?** It helped the team to work on large amounts of 3D data seamlessly and efficiently. The best part is that it was free to use and could also be downloaded on smartphones. ### 2. CAD Assistant is hands down the best (Free) tool for CAD viewing and migration **Rating:** 4.5/5.0 stars **Reviewed by:** Sanyog L. | M, Small-Business (50 or fewer emp.) **Reviewed Date:** June 29, 2021 **What do you like best about CAD Assistant?** CAD assistant is a free CAD viewer and migrator utility made with the Opencascade kernel. Some of the unique features of this utility are : 1. You can convert STEP files to .obj files and then use them inside Blender or any other animation tool. So, this makes it very easy to take the CAD files and render them out using a separate package. 2. It lets you view CAD files, manufacturing dimensions, sectional views, orthographic views, wireframe, and mesh views. 3. It supports a variety of formats (both mesh data and CAD data). Some of them include .step, .iges, .obj, .xt etc. For the entire list, you can check its documentation. 4. It lets you measure the linear dimensions of the part. 5. Allows importing multiple bodies. 6. Can extend its capabilities according to the company's requirements if necessary. **What do you dislike about CAD Assistant?** It would be easier if we could change the pivot point for the 3D viewport. That would make the viewer much easier to use. Also, I wish "CAD rays" (another Opencascade's fantastic tool) was integrated inside of this tool itself so that one could also render out images from a single tool. Also, the scripting feature available inside CAD rays is something that CAD Assistant would benefit from if it was made available. **Recommendations to others considering CAD Assistant:** It's a free tool. So, there's nothing much to think about if you want to choose this tool. However, I'd say this tool is a perfect demonstration of what the Opencascade kernel is capable of doing. I've been trying to learn Opencascade for a while to create specific CAD tools according to mine and my company's requirements. Go and make use of this lightweight, easy-to-use tool. Take it everywhere you go on your USB drive. You never know when it will come in handy. **What problems is CAD Assistant solving and how is that benefiting you?** I used to render SOLIDWORKS using Visualize only. But, that tool was limited compared to other tools like Blender. Though SOLIDWORKS lets you convert the CAD files to obj directly., I've found using CAD assistant for exporting my CAD files much more efficient. It's a very compact tool, and I can carry it anywhere on my USB drive. So, wherever I go, I can view and export CAD files without the hassle of starting up large software like SOLIDWORKS. ## CAD Assistant Discussions - [What is CAD Assistant used for?](https://www.g2.com/discussions/what-is-cad-assistant-used-for) - [View CAD Assistant pricing details and edition comparison](https://www.g2.com/products/cad-assistant/reviews?section=pricing&secure%5Bexpires_at%5D=2026-06-30+21%3A24%3A40+-0500&secure%5Bsession_id%5D=a70fd764-e337-40d3-af62-16165e0bae8f&secure%5Btoken%5D=1f327f572e3397d1de542d8b2f67d191f15217cdf25fff30fb0ee70d0879d07d&format=llm_user) ## CAD Assistant Features **File Options** - Import files - Export files - View 2D files - View 3D files - Batch convert files - File size **Tools** - Dimensioning tools - Change units - 3D/solid modeling tools **Design** - Drawing ## Top CAD Assistant Alternatives - [Onshape](https://www.g2.com/products/onshape/reviews) - 4.7/5.0 (682 reviews) - [SOLIDWORKS](https://www.g2.com/products/solidworks/reviews) - 4.5/5.0 (628 reviews) - [Autodesk Fusion](https://www.g2.com/products/autodesk-fusion/reviews) - 4.5/5.0 (510 reviews)