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Visualization Toolkit for the Web
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VTK.js - The Visualization Toolkit for JavaScript

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VTK is an open-source software system for image processing, 3D graphics, volume rendering and visualization. VTK includes many advanced algorithms (e.g., surface reconstruction, implicit modelling, decimation) and rendering techniques (e.g., hardware-accelerated volume rendering, LOD control). The JavaScript implementation remain a subset of the actual C++ library but efforts will be made to easily port or compile native VTK code into WebAssembly to better blend both world.

The origin of VTK is with the textbook "The Visualization Toolkit, an Object-Oriented Approach to 3D Graphics" originally published by Prentice Hall and now published by Kitware, Inc. (Third Edition ISBN 1-930934-07-6). VTK has grown (since its initial release in 1994) to a world-wide user base in the commercial, academic, and research communities.

vtk.js aims to be a subset of VTK and provide 3D rendering using WebGL for both geometry and volume rendering.

Reporting Bugs

If you have found a bug:

  1. If you have a patch, please read the document.

  2. Otherwise, please join the one of the VTK Mailing Lists and ask about the expected and observed behaviors to determine if it is really a bug.

  3. Finally, if the issue is not resolved by the above steps, open an entry in the VTK Issue Tracker.


In general VTK tries to be as portable as possible; the specific configurations below are known to work and tested.

vtk.js supports the following development environments:

  • Node 8+
  • NPM 6+

and we use @babel/preset-env with the defaults set of browsers target. But when built from source this could be adjusted to support any browser as long they provide WebGL.


See the documentation for a getting started guide, advanced documentation, and API descriptions.


See for instructions to contribute.


VTK is distributed under the OSI-approved BSD 3-clause License. See Copyright.txt for details.

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