Bug - Black background

Topic summary

A user is experiencing an issue where PNG images with transparent backgrounds are being converted to JPG format with black backgrounds when uploaded to their Shopify store’s collection pages.

Problem Details:

  • User uploads PNG files without backgrounds to collection settings
  • Upon saving, Shopify automatically converts them to JPG format
  • The transparent areas appear as black backgrounds in the final display
  • Issue is visible on the store’s collection list page

Current Status:

  • A helper confirmed the images are indeed being served as JPG files (not PNG)
  • The automatic format conversion during the save process was identified as the root cause
  • Unresolved: No solution has been provided yet

Suggested Next Steps:

  • Contact theme support for assistance
  • May require code-level investigation to prevent automatic image conversion
Summarized with AI on October 31. AI used: claude-sonnet-4-5-20250929.

Hello, I have a problem on my main page: I would like to use PNG images without a background in my collection, however when I try to use one this is what happens: a black background appears and I don’t know how to resolve the problem
Thank you very much for reading!

here is a link to see what’s happening : https://postimg.cc/SJZnrGWV

Hello @Nuphar ,

Please share the store URL.

Regards
Guleria

Hello, my bad sure here it is : https://concours-medecine.be/ in the collection list you can see it

The image you are using is not transparent and it’s in jpg format.

https://concours-medecine.be/cdn/shop/collections/8c38d9a9-34b3-42bd-9b82-ac028e78995a_1.jpg

Hello, you are very right, thing is i’m uploading PNJ with no background and when i save the settings of the collections, it turns the image into JPG withblack background… idk how to fix it

Thank you

here are the screens :

https://freeimage.host/i/3HCgHvI
https://freeimage.host/i/3HCUy2p

Strange btw for this I have to check the code. You can find the contact details in the signature below.

Or try to reach theme support.