Open-source licenses

The free tools are built on the open-source libraries below. We are grateful to the people who make them.

• three.js version 0.186.1

  Reads 3D model files and draws them in the browser.

  Copyright © 2010-2026 three.js authors. Released under the MIT license.

  Used by: Free GLB Viewer Online, Free STL Viewer Online, Free OBJ Viewer Online, Free FBX Viewer Online, Free 3MF Viewer Online, Free DAE Viewer Online, Free 3D Model Viewer Online, Free FBX to GLB Converter, Free OBJ to GLB Converter, Free STL to GLB Converter, Free DAE to GLB Converter, Free 3MF to GLB Converter, Free glTF to GLB Converter, Free GLB to STL Converter, Free GLB to OBJ Converter, Free GLB to PLY Converter, Free GLB to USDZ Converter, Free OBJ to STL Converter, Free STL to OBJ Converter, Free FBX to OBJ Converter, Free FBX to STL Converter, Free 3MF to STL Converter, Free STL to 3MF Converter

• Draco decoder (shipped with three.js) version 0.186.1

  Unpacks Draco-compressed shapes in GLB and glTF files.

  Copyright © 2016 The Draco Authors. Released under the Apache-2.0 license.

  Used by: Free GLB Viewer Online, Free 3D Model Viewer Online, Free glTF to GLB Converter, Free GLB to STL Converter, Free GLB to OBJ Converter, Free GLB to PLY Converter, Free GLB to USDZ Converter

• meshoptimizer decoder (shipped with three.js) version 0.186.1

  Unpacks Meshopt-compressed shapes in GLB and glTF files.

  Copyright © 2016-2026 Arseny Kapoulkine. Released under the MIT license.

  Used by: Free GLB Viewer Online, Free 3D Model Viewer Online, Free glTF to GLB Converter, Free GLB to STL Converter, Free GLB to OBJ Converter, Free GLB to PLY Converter, Free GLB to USDZ Converter

• fflate version 0.8.3

  Packs and unpacks the zip files inside 3MF models.

  Copyright © 2023 Arjun Barrett. Released under the MIT license.

  Used by: Free 3MF to GLB Converter, Free 3MF to STL Converter, Free STL to 3MF Converter

• exifr version 7.1.3

  Reads the camera, date and location tags of a photo.

  Copyright © 2020 Mike Kovařík, Mutiny.cz. Released under the MIT license.

  Used by: Free Photo Metadata Remover

• libheif-js (libheif with the libde265 decoder) version 1.23.5

  Reads HEIC photos in browsers that cannot open them themselves.

  Copyright © struktur AG and the libheif and libde265 authors. JavaScript build by the libheif-js authors. Released under the LGPL-3.0 license.

  A separately loaded, replaceable library. It is not part of this site's own code: it is two unmodified files, libheif.js and libheif.wasm, that your browser downloads only when a HEIC photo needs converting. They can be swapped for another build of the same library, and the license text is served beside them.

  Source code: https://github.com/strukturag/libheif

  Used by: Free HEIC to JPG Converter