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How to Fix Power Apps SharePoint Images Not Loading on Mobile
Question details
Images stored in a SharePoint document library are failing to render when viewed through the Power Apps mobile application, despite loading perfectly in desktop browsers.
- Product
- Power Apps and SharePoint
- Device & OS
- Mobile (iOS/Android)
- Scenario
- Displaying images from a connected SharePoint document library inside a Power Apps gallery or HTML Text control on a mobile device.
- Observed behavior
- The images show up correctly when the app is run on a desktop web browser but appear broken, blank, or fail to load entirely within the Power Apps mobile application.
Verify that your Power Apps mobile application is updated to the latest version and that your account has the appropriate read permissions for the connected SharePoint document library.
Use SharePoint Thumbnail Properties Instead of Direct Links
Replace the direct link to the SharePoint item with the built-in Thumbnail property to ensure reliable image rendering across both desktop and mobile platforms.
When connecting a Power Apps gallery to a SharePoint document library, using direct paths like the 'Link to item' property often causes authentication or resolution issues on mobile clients. Utilizing SharePoint's auto-generated thumbnail URLs bypasses these mobile-specific rendering limitations.
Navigate to the Power Apps maker portal, locate your application, and open it in Edit mode.
Click on the specific Image control inside your gallery that is connected to the SharePoint document library.
In the formula bar at the top, select the 'Image' property. Change the existing formula (e.g., `ThisItem.'Link to item'`) to `ThisItem.Thumbnail.Large`.
Save your changes and publish the application. Open the Power Apps mobile app, pull down to refresh the app list, and launch the app to verify the images now load correctly.
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Frequently Asked Questions
Why do SharePoint images load on desktop but not in the Power Apps mobile app?
Desktop browsers natively handle SharePoint authentication and direct links (like 'Link to item') much better than the Power Apps mobile client. The mobile app often struggles to securely resolve these direct file paths, whereas SharePoint Thumbnail properties provide standardized, accessible image URLs that the mobile app can render consistently.
Can I use smaller thumbnail sizes in Power Apps to improve performance?
Yes. If your gallery loads many images, you can change `ThisItem.Thumbnail.Large` to `ThisItem.Thumbnail.Medium` or `ThisItem.Thumbnail.Small`. This reduces the payload size and significantly improves loading speeds, especially for mobile users on cellular networks.
What should I do if the Thumbnail property is blank or not showing up?
If the Thumbnail property is unavailable in your Power Apps formula bar, try refreshing the SharePoint data connection. Go to the 'Data' panel in Power Apps, click the ellipsis next to your SharePoint library, and select 'Refresh'. If it still fails, ensure the SharePoint library is properly indexing the image files.
