Open Source Notices
Licenses, source-code references, and notices for browser-delivered CAD components.
Last updated: June 11, 2026
This page lists the Open CASCADE Technology related open-source components distributed with confBuild's web application and hosted configurator experience.
For questions about these notices or corresponding source materials for a specific deployed binary, contact daniel@confbuild.com.
1. Open CASCADE Technology (OCCT)
confBuild uses Open CASCADE Technology through JavaScript/WebAssembly integrations for exact CAD modeling and STEP/IGES/BREP import workflows.
- License: GNU Lesser General Public License version 2.1 with the Open CASCADE Exception 1.0.
- Official licensing page: dev.opencascade.org/resources/licensing
- Source code: github.com/Open-Cascade-SAS/OCCT
- License texts: LGPL 2.1 and Open CASCADE Exception 1.0
2. opencascade.js
confBuild uses opencascade.js as a JavaScript/WebAssembly port of Open CASCADE Technology for exact modeling operations.
- Package version: 1.1.1
- Package license: LGPL-2.1-only
- Underlying OCCT version documented by the package: V7_4_0p1
- Distributed WebAssembly artifact in the app:
/assets/opencascade/opencascade.wasm.wasm - Source release: github.com/donalffons/opencascade.js/releases/tag/v1.1.1
- Repository: github.com/donalffons/opencascade.js
- npm package tarball: opencascade.js-1.1.1.tgz
- License text: opencascade.js-1.1.1-LICENSE.txt
3. occt-import-js
confBuild uses occt-import-js for STEP, IGES, and BREP import through Open CASCADE Technology compiled to WebAssembly.
- Package version: 0.0.23
- Package license: LGPL-2.1
- Underlying OCCT version documented by the 0.0.23 release: 7.6.1
- Distributed WebAssembly artifact in the app:
/occt-import-js.wasm - Source release: github.com/kovacsv/occt-import-js/releases/tag/0.0.23
- Repository: github.com/kovacsv/occt-import-js
- npm package tarball: occt-import-js-0.0.23.tgz
- License texts: package license, OCCT license text included by the package, and occt-import-js license text included by the package
4. Source and modification status
The confBuild repository does not maintain local patches to OCCT, opencascade.js, or occt-import-js for these package-distributed WebAssembly artifacts as of this notice date. If a deployed artifact is changed in the future, this notice should be updated with the corresponding changed source.
The source and build materials for the package-distributed WebAssembly artifacts are available from the upstream source, release, and package links listed above. A plain-text copy of this notice is available at /legal/open-source/THIRD_PARTY_NOTICES.txt.