# Are custom extensions private?

**URL:** <https://discourse.slicer.org/t/are-custom-extensions-private/25264>\
**Category:** Development\
**Tags:** extensions-manager, module\
**Created:** [September 14, 2022, 2:26pm UTC](https://discourse.slicer.org/t/are-custom-extensions-private/25264 "2022-09-14T14:26:29Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Luca](https://avatars.discourse-cdn.com/v4/letter/l/51bf81/32.png) [@Luca](https://discourse.slicer.org/u/Luca)\
**Post date:** [September 14, 2022, 2:26pm UTC](https://discourse.slicer.org/t/are-custom-extensions-private/25264/1 "2022-09-14T14:26:29Z")

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Hello, I’m new to Slicer and would like to create and extension that contains some custome modules. When I created the extension through the extension wizard a CMakeLists.txt was automatically created. This file contains a URL to a description page of my extension on Slice Documentation (no content on the page).

My extension is created locally right? As my understanding to make it public I have to submit it to the Slicer Extensions Index.

I will consider sharing when my code is ready:)

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**Author:** ![cpinter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cpinter/32/7995_2.png) [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Post date:** [September 15, 2022, 10:05am UTC](https://discourse.slicer.org/t/are-custom-extensions-private/25264/2 "2022-09-15T10:05:50Z")

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Yes your understanding is correct. Those URLs are just part of the template. Nothing has been created remotely when you used the extension wizard.