# Extension site not found

**URL:** <https://discourse.slicer.org/t/extension-site-not-found/46484>\
**Category:** Support\
**Tags:** extensions-manager\
**Created:** [March 17, 2026, 2:00pm UTC](https://discourse.slicer.org/t/extension-site-not-found/46484 "2026-03-17T14:00:22Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Aram](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/aram/32/82097_2.png) [@Aram](https://discourse.slicer.org/u/Aram)\
**Post date:** [March 17, 2026, 2:00pm UTC](https://discourse.slicer.org/t/extension-site-not-found/46484/1 "2026-03-17T14:00:22Z")

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Hi. I am new to Slicer3D. The web page [https://extensions.slicer.org/](https://extensions.slicer.org/) is not found. So I cant install any additional modules. What should I do?

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**Author:** ![jamesobutler](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jamesobutler/32/7511_2.png) [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Post date:** [March 17, 2026, 2:06pm UTC](https://discourse.slicer.org/t/extension-site-not-found/46484/2 "2026-03-17T14:06:02Z")

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An announcement will be made at [Extension server is down](https://discourse.slicer.org/t/extension-server-is-down/46478) , once it is fixed.

Slicer 5.10.0 extensions could be directly accessed via [SPKC](https://slicer-packages.kitware.com/#collection/5f4474d0e1d8c75dfc70547e/folder/69120522ac7b1c95e7937500)

Latest Slicer Preview 5.11.0 rev 34460 can be directly accessed via [SPKC](https://slicer-packages.kitware.com/#collection/5f4474d0e1d8c75dfc70547e/folder/69b8e7f70716b743fc035a80)

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**Author:** ![Nancy\_Casper](https://avatars.discourse-cdn.com/v4/letter/n/b5e925/32.png) [@Nancy\_Casper](https://discourse.slicer.org/u/Nancy_Casper)\
**Post date:** [April 8, 2026, 11:06am UTC](https://discourse.slicer.org/t/extension-site-not-found/46484/3 "2026-04-08T11:06:11Z")

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It’s easy to get thrown off when a site like that goes down unexpectedly, so having a direct alternative for downloading the extensions manually is a great backup. I’ll definitely keep this link bookmarked for the next time the main site is acting up.