Search code examples
jpegthumbnailsepiserver

Episerver Thumbnails for jpegs are getting a 404

In Episerver 11, the thumbnails for jpegs are broken. In the media library, they display as broken images:

enter image description here

And I see this in the browser tools:

Failed to load resource: the server responded with a status of 404 ()

On the actual url

https://mysite.mydomain.com/episerver/CMS/Content/siteassets/heros/myimage.jpg,,26/Thumbnail?epieditmode=False?1527614597161

On an actual web page and in the Image editor, they display fine. Not entirely sure how the thumbnail system works.

Solution

  • Make sure your thumbnails are saved as png's.

    I had the same problem, due to a third-party library for image resizing. It turns out Episerver (CMS version 9.12), always wants to save the thumbnail for an image in a png format.