Free Tools: third-party software notices
Last updated: 2026-08-08

The browser-local tools use the following unmodified open-source packages.
Their full licence texts are distributed alongside this notice.

- pdf-lib 1.17.1: MIT
  Source: https://github.com/Hopding/pdf-lib
  Licence: /tools/licenses/pdf-lib-LICENSE.md

- PDF.js / pdfjs-dist 6.2.108: Apache-2.0
  Source commit: https://github.com/mozilla/pdf.js/tree/0365cbde028bd92e58f2dab1bb70cd30ac7acfd7
  Licence: /tools/licenses/pdfjs-dist-LICENSE.txt

- Three.js 0.185.1: MIT
  Source: https://github.com/mrdoob/three.js
  Licence: /tools/licenses/three-LICENSE.txt

- meshoptimizer decoder 1.1, distributed through Three.js: MIT
  Copyright (C) 2016-2026 Arseny Kapoulkine
  Source: https://github.com/zeux/meshoptimizer
  Licence: /tools/licenses/meshoptimizer-LICENSE.txt

- web-ifc 0.0.77: MPL-2.0
  Source commit: https://github.com/ThatOpen/engine_web-ifc/tree/f26c4beef0a668ebdb180d2b95a94097a1e21cef
  Source archive: https://github.com/ThatOpen/engine_web-ifc/archive/f26c4beef0a668ebdb180d2b95a94097a1e21cef.tar.gz
  Licence: /tools/licenses/web-ifc-LICENSE.md

- occt-import-js 0.0.23: LGPL-2.1
  Source commit: https://github.com/kovacsv/occt-import-js/tree/c2148e54b456b571238d35cac037d304053d64b2
  Source archive: https://github.com/kovacsv/occt-import-js/archive/c2148e54b456b571238d35cac037d304053d64b2.tar.gz
  Build and relink instructions: https://github.com/kovacsv/occt-import-js/tree/c2148e54b456b571238d35cac037d304053d64b2#how-to-build-on-windows
  Licence: /tools/licenses/occt-import-js-LICENSE.md

- Open CASCADE Technology, distributed through occt-import-js: LGPL-2.1
  Embedded source commit: https://github.com/Open-Cascade-SAS/OCCT/tree/d2abb6d844231cb8f29be6894440874a4700e4a5
  Source archive: https://github.com/Open-Cascade-SAS/OCCT/archive/d2abb6d844231cb8f29be6894440874a4700e4a5.tar.gz
  Licence: /tools/licenses/opencascade-LICENSE.txt

- dxf-parser 1.1.2: MIT
  Source: https://github.com/gdsestimating/dxf-parser
  Licence: /tools/licenses/dxf-parser-LICENSE.txt

- fflate 0.8.3: MIT
  Source: https://github.com/101arrowz/fflate
  Licence: /tools/licenses/fflate-LICENSE.txt

These packages are loaded from Brevity's own site and execute in the visitor's
browser. Brevity does not send selected file contents, filenames, or generated
results to the upstream projects.

The OCCT WebAssembly object is kept as a separate, replaceable browser asset.
The exact wrapper source, embedded OCCT revision, build scripts and licence
texts above provide the materials needed to rebuild or relink a modified,
licence-compatible version. Preserve this notice and those materials with any
redistribution. Legal review remains part of Brevity's production release gate.