NASSCAD

At a glance

• Editor score
  3.3 / 10
• Pricing
  Free plan
• Best for
  Free browser users making parametric solid models
• Free plan
  Yes
• Paid from
  Free
• Assembly design
  Yes
• Facts checked
  19 Sep 2026

• 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

Our verdict on NASSCAD

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.

Your product? Our editors can test NASSCAD in depth and publish a review, labelled as paid · from $149/mo →

NASSCAD pricing

All 1 NASSCAD plans and prices →

NASSCAD fact sheet

NASSCAD integrations

NASSCAD lists 10 integrations on its own site.

• FreeCAD
• Fusion 360
• Autodesk Viewer
• Cura
• PrusaSlicer
• Bambu Studio
• Blender
• MeshLab
• CloudCompare
• LibreCAD

Alternatives to NASSCAD

• Siemens NXDeep hybrid CAD with Teamcenter integration for large engineering organizations.9.4
• CATIAA deep engineering suite for complex products, with enterprise pricing to match.9.3
• SSOLIDWORKSFull mechanical CAD with broad design, manufacturing, simulation, and collaboration tools.9.2

See all NASSCAD alternatives →

Featured on iTechGuides

NASSCAD is listed in our 3D CAD Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update