Show HN: Nasscad – local-first 3D CAD for browser and Windows

Third-party components — bundled locally, no third-party CDN:

In the browser

· three.js r128 (three.js authors) — MIT — 3D WebGL rendering

· OpenCASCADE Technology 7.4.0 via opencascade.js 1.1.1 (Open Cascade SAS / Sebastian Alff) — LGPL 2.1 with exception — B-Rep CAD kernel: fillet/chamfer, STEP assembly, colour and PMI reading

· occt-import-js (Viktor Kovács) — LGPL 2.1 — STEP import, embeds OpenCASCADE Technology

· web-ifc 0.0.77 (That Open Company) — MPL 2.0 — IFC import (IFC2X3 / IFC4 / IFC4X3)

· Draco 1.5.7 (Google) — Apache 2.0 — mesh compression, glTF/GLB import and export

· helvetiker_regular / bold (MAGENTA Ltd, MgOpen Modata) — MgOpen License

· optimer_regular / bold (MAGENTA Ltd, MgOpen Cosmetica) — MgOpen License

· gentilis_regular / bold (J. Victor Gaultney / SIL International) — SIL OFL 1.1

· nasscad_logs.js (NassLab) — CC BY-NC 4.0 — structured logging module

In the NASSCAD Engine companion (optional, runs on your machine)

· OpenCASCADE Technology 8.0.1 (Open Cascade SAS) — LGPL 2.1 with exception — native STEP reading and tessellation, unmodified DLLs

· Manifold 3.5.3 (Emmett Lalish and contributors) — Apache 2.0 — boolean CSG engine

· oneTBB 2022.2.0 (Intel / UXL Foundation) — Apache 2.0 — multithreading

· Clipper2 1.5.4 (Angus Johnson) — Boost Software License 1.0 — 2D polygon clipping, used by Manifold

· hwloc 2.11.2 (Inria and the Open MPI project) — BSD 3-Clause — CPU topology detection, shipped with oneTBB

Web version only (nasscad.com)

· Google Analytics 4 (Google) — audience measurement, loaded only when NASSCAD is opened from nasscad.com — never when the file is opened locally, from a school portal (ClassLink, Clever, Google Classroom…), with ?edu=1, or when the browser sends Global Privacy Control / Do Not Track — Privacy

Source code of the LGPL / MPL components

· OCCT (tag V8_0_1) · opencascade.js (v1.1.1) · occt-import-js · web-ifc (0.77)

Each component remains under its own license. Full texts: MIT · Apache 2.0 · LGPL 2.1 · OCCT exception · MPL 2.0 · BSL 1.0 · BSD 3-Clause · SIL OFL 1.1

⚖ NASSCAD V4.7.0 License

© 2026 NassLab — Nasser, France

This software is distributed under the Creative Commons BY-NC 4.0 license:

· Personal and non-commercial use — free, redistribution allowed with attribution

· Commercial use — written agreement required from NassLab

This license covers NassLab code only — the third-party components listed above remain under their own licenses.

No implied warranty. The author cannot be held liable for any damage resulting from the use of this software.