FreeCAD is a parametric 3D modeler made primarily to design real-life objects of any size. It is open-source and highly customizable.
Best 3D-Tool Alternatives ranked by AI · updated Aug 2026
3D-Tool is a Windows-focused CAD viewer and analysis application that supports STEP and many other 3D formats. It is designed for manufacturing, engineering, and supplier review workflows requiring measurements, sections, annotations, and geometry checks.
Top 6 3D-Tool alternatives
eDrawings Viewer is a free software from SolidWorks that allows users to view, print, and review 2D and 3D CAD files.
Glovius is a 3D CAD viewer for CATIA, STEP, IGES, Creo, SolidWorks, NX, JT, Pro/ENGINEER, and Inventor files.
Starting from $480 per year
ShareCAD is a browser-based viewer for CAD drawings, 3D models, and related technical files, intended for users who need quick access without...
Pros
- Offers a fast, no-install workflow similar to Online 3D Viewer
- Supports common 2D and 3D CAD formats
- Provides straightforward links for sharing files
Cons
- Has fewer advanced model-inspection tools than Online 3D Viewer
- File-size and format limitations can affect larger projects
- Less modern presentation and collaboration support than Sketchfab
IDA-STEP is a free desktop application for viewing and inspecting STEP product data, aimed at engineers and CAD professionals. It provides access...
Pros
- Focused specifically on STEP data rather than general-purpose CAD
- Displays product structure and STEP attributes alongside geometry
- Free for inspecting standards-based engineering data
Cons
- Older interface and workflow than modern CAD viewers
- Less suitable for editing or creating native CAD models
- Narrower format support than general-purpose viewers
Creo View Express is a free 3D CAD visualization tool for engineers, suppliers, and other stakeholders who need to review product data...
Pros
- Strong compatibility with Creo and PTC product data
- Supports 3D inspection, markup, and measurement workflows
- Free for users who only need CAD visualization
Cons
- Less broadly accessible than browser-based CAD viewers
- Advanced capabilities depend on the surrounding PTC ecosystem
- Not a CAD authoring or editing application
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