https://portableapps.com/apps/graphics_pictures/xnview_portable
XnView Classic Portable | PortableApps.com
Import about 400 graphic file formats Export about 50 graphic file formats Multipage TIFF, Animated GIF, Animated ICO support Image IPTC, EXIF metadata support...
xnview classicportable
https://newsgroup.xnview.com/viewtopic.php?p=140860
Missing features (compared to XnView Classic) - Page 6 - XnView Software
missing featurescompared toxnview classicsoftware