topic Re: Simple question about ACA (Alfresco Content Application) thumbnails in Alfresco Forum

Simple question about ACA (Alfresco Content Application) thumbnails

NormandoHall — Tue, 23 Jun 2026 22:33:17 GMT

I have Alfresco 26.1 working correctly, and I can see the thumbnails of PDFs and images in share. In my ACA version 7.5.0, which I downloaded and compiled, I don't see the file thumbnails as I do in the share folder. Share and ACA screenshots:

Share

ACA

Any help is welcome.

Regards

Re: Simple question about ACA (Alfresco Content Application) thumbnails

jesusmarmol — Thu, 25 Jun 2026 06:41:19 GMT

Hi.

AFAIK the default working of ACA is to load a thumbnail based only in the mymetype, you can check the thumbnail service

I guess this wwas made to avoid extra request but you can extend the document list or create a custom column and load the thumbnail

Re: Simple question about ACA (Alfresco Content Application) thumbnails

WilliamsWelsh — Tue, 14 Jul 2026 05:42:01 GMT

If Share displays thumbnails correctly but ACA doesn't, the repository is probably generating thumbnails, so the issue is more likely on the ACA side. I'd check whether the ACA configuration is requesting the correct rendition (for example, doclib) and verify that the rendition endpoints are accessible. Also, inspect the browser's developer tools for failed thumbnail requests (404/403) or CORS errors—they often point directly to the root cause. Hopefully it's just a configuration mismatch rather than a rendering issue in ACA itself.

Re: Simple question about ACA (Alfresco Content Application) thumbnails

NormandoHall — Tue, 14 Jul 2026 06:35:20 GMT

I did everything you mentioned and there are no errors or doclib requests. I think ACA doesn't display thumbnails by design. I'm sorry this isn't documented anywhere so I can confirm if that's actually the case.

Thanks anyway.