Extension Wizard


The Extension Wizard modules provides a graphical interface within Slicer to aid in the creation of Slicer extensions.

Panels and their use

  • Extension Tools:

    • Create Extension: Create a new extension from a specified template, given a name and destination. The newly created template is automatically selected for editing.

    • Select Extension: Choose an existing extension to edit. If the extension provides scripted modules that are not already loaded, an option to load such modules is provided.

  • Extension Editor:

    • Name: The name of the currently selected extension.

    • Location: The location (on disk) of the currently selected extension.

    • Repository: If available, the upstream URL of the repository hosting the extension.

    • Contents: A tree view showing the file contents of the currently selected extension.

    • Add Module to Extension: Create a new module from a specified template, given a name, and add it to the selected extension.

    • Edit Extension Metadata: Edit metadata associated with the extension (such as the name, contributors, etc.).


The Extension Wizard module provides a settings page, which is accessible via the Application Settings.

  • Built-in template path: If found, displays the location of the built-in templates.

  • Additional template paths: A list of additional locations containing categorized templates.

  • Additional template paths for <category>: A list of additional locations containing templates for a particular category (e.g. extensions, modules).

A “template” is a directory containing a collection of files which comprise that template. Additional paths should point to directories which contain such template directories, not the directory of the template itself. A categorized template directory should have directories for one or more categories, which in turn contain templates.

The built-in templates provide an example of the correct layout for a categorized template directory. (Each category directory is in turn an example of a template collection for that category.)


  • Matthew Woehlke (Kitware)

  • Jean-Christophe Fillion-Robin (Kitware)


This work is part of the National Alliance for Medical Image Computing (NA-MIC), funded by the National Institutes of Health through the NIH Roadmap for Medical Research, Grant U54 EB005149. Information on NA-MIC can be obtained from the NA-MIC website.