"A QlikView Extension allows you to visualize your data the way you want to see it. With Extensions fully interactive custom visualizations can be used directly from within QlikView. This feature enables the use of specialist visualizations and user interface components that are not present in standard QlikView today. Extensions allow developers, for example, to create and use a map, a tag cloud or an infographic chart directly from within their QlikView application like any other QlikView object.
QlikView Extensions are built by developers using standard web technologies and are installed alongside a standard QlikView installation. An Extension is developed and packaged by a developer ready to be installed then used within a QlikView application. This plug-in mechanism allows Extensions to be developed once and re-used in multiple QlikView applications. Once an Extension is built by a developer end users can easily add these from the palette of available objects."