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NASSCAD review

Free#63 of 80 in 3D CAD Software3D Modeling Software

A free, offline-capable CAD tool for parametric solids and practical file exchange.

3.3/10Editor score
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

NASSCAD is a browser-based parametric 3D CAD application for makers and engineers working on solid models, 3D printing, CNC, and mechanical assemblies. It is available on the web and Windows, and its free plan runs without an account. The application can also operate offline as a single HTML file, making it suited to people who want local, self-contained modeling rather than cloud collaboration. Parametric modeling, Boolean CSG, and generators for gears, pipes, screws, and nuts cover practical part-design workflows.

File exchange is a notable strength for a free tool. NASSCAD imports STEP AP203, AP214, and AP242, and exports STEP AP242 alongside STL, OBJ, 3MF, GLB, PLY, SVG, and DXF workflows. It can read PMI and GD&T from AP242 files. Listed ecosystem connections include FreeCAD, Fusion 360, Autodesk Viewer, Cura, PrusaSlicer, Bambu Studio, Blender, MeshLab, CloudCompare, and LibreCAD, useful when a model needs to move into another CAD, viewing, slicing, or mesh application. Projects can be saved and loaded locally or stored in IndexedDB; NassScript offers a JavaScript console with async/await support.

The main qualification is how the free offer applies to commercial work: NASSCAD is free for personal and non-commercial use under CC BY-NC 4.0, while commercial use requires a written agreement. There is also a Windows dependency for Boolean operations in version 4.7.0: the free Windows x64 MEDUSA companion engine is required. That, plus support limited to web and Windows, makes NASSCAD a better fit for cost-conscious individual workflows than for teams seeking cloud collaboration or broad platform coverage. Choose it for accessible parametric modeling and manufacturing-oriented exchange; consider a fuller CAD suite if your work depends on a wider modeling and documentation feature set.

NASSCAD pros and cons

  • Where it wins
    • Runs in a browser without an account and can work offline from one HTML file
    • Imports and exports STEP assemblies, including AP203, AP214, and AP242
    • Includes parametric gear, pipe, screw, and nut generators
  • Where it doesn't
    • Commercial use requires a written agreement
    • Boolean operations in version 4.7.0 require the free Windows x64 MEDUSA engine
    • Its platform support is limited to web and Windows

NASSCAD fact sheet, pricing and score →

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