XnView Software

https://www.w3.org/TR/png-3/

After more than two decades, a new PNG spec was just released, with proper HDR support, official EXIF support and official APNG recognition

Same here.
It starts OK, can paste image from clipboard and even successfully save it to any supported format, but can't open any image!
Previous ver. 2.52.1 worked fine, so something was critically changed in 2.52.2

Bug in the latest ver. 4.2.0.0: some mysterious "f" (placeholder?) in context menu instead of the image size

dma_k wrote: Sat Sep 23, 2023 9:01 pm XSusie.dll

https://www.xnview.com/download/plugins/susie.zip

xnview wrote: Mon Dec 05, 2022 10:06 am 4.1.6 version released

On x32 Win XP no problems on the first sight, preview and all works, but if click "Options..." - there is just appear completely invisible window, blocking Explorer and everything! Thanks God it can be closed by ESC.
No such bug in the previous 4.1.5

xnview wrote: Wed Sep 21, 2022 1:48 pmyes i'll fix it

Nice!
Same should be done with XnViewShellExt too, because there are the same problems with wrong colors in preview when using Susie plugins

To view AVIF in XnView you can try Susie plugins
One
Two (HEIF/AVIF)

Also JXL just in case

Pierre :
Also for some reason XnView's plugin for Susie plugins ( Xsusie.dll ) contains wrong data in version info section from another plugin:

"CompanyName", "XnView"
"FileDescription", "XnView JPEG ...

i've released the 4.1.0 (webp + color profile)


Wait a minute
So there are now folder with plugins next to XnViewShellExt.dll ?
With the same plugins that are already in XnView\Plugins\ ?
So you need DOUBLE amount of the same plugins, one for XnView itself and second for XnViewShellExt.dll to ...

Christian_74 wrote: Wed Mar 06, 2019 10:49 am insecure page, to download a free plugin from a sourceforge account
https://sourceforge.net/projects/tumagcc/
tagged with "Malware Detected".

That/s false-positive from SourceForge
Visit author 's page if you have doubts

@Christian_74

No need for shareware plugins
Just download rsvg-convert and extract rsvg-convert.exe in to the Plugins directory