# Can't open a local file on web UI?

**URL:** <https://discourse.slicer.org/t/cant-open-a-local-file-on-web-ui/44255>\
**Category:** Support\
**Created:** [August 29, 2025, 2:38pm UTC](https://discourse.slicer.org/t/cant-open-a-local-file-on-web-ui/44255 "2025-08-29T14:38:02Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Rod\_Whiteley](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/rod_whiteley/32/80924_2.png) [@Rod\_Whiteley](https://discourse.slicer.org/u/Rod_Whiteley)\
**Post date:** [August 29, 2025, 2:38pm UTC](https://discourse.slicer.org/t/cant-open-a-local-file-on-web-ui/44255/1 "2025-08-29T14:38:02Z")

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Operating system: Windows 11  
Slicer version: 5.03  
Expected behavior: Upload a nrrd file to analyse  
Actual behavior: can’t access local files (Downloads folder) from

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [August 29, 2025, 2:38pm UTC](https://discourse.slicer.org/t/cant-open-a-local-file-on-web-ui/44255/2 "2025-08-29T14:38:18Z")

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Do you run Slicer in a docker container?

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<div class="post-metadata">

**Author:** ![Rod\_Whiteley](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/rod_whiteley/32/80924_2.png) [@Rod\_Whiteley](https://discourse.slicer.org/u/Rod_Whiteley)\
**Post date:** [August 29, 2025, 4:03pm UTC](https://discourse.slicer.org/t/cant-open-a-local-file-on-web-ui/44255/3 "2025-08-29T16:03:22Z")

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On this machine I was trying to run it in a Jupytper window as the local installation said I couldn’t run OpenGL (despite Open GL 1.1.0; Radeon RX560X; Intel UHD Graphics 63C are the display adapters, 12-core Intel i7CPU).

I have installed on a different machine where it’s running locally, and it works a treat. Perhaps the web/Jupyter version doesn’t allow opening local files?

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [August 29, 2025, 5:26pm UTC](https://discourse.slicer.org/t/cant-open-a-local-file-on-web-ui/44255/4 "2025-08-29T17:26:40Z")

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Applications that are running inside a container are isolated from the host, you can only access those folders that you choose to expose in the container. If you are running Slicer on a remote host then you need to upload/download your files. You can use the Jupyter GUI to transfer files between your local computer and the remote Jupyter server.