XnView Software

Try in the catalog filter you have a filter "uncategorized" in the special items.

I tried, but it doesn't work. I don't use any xnviewmp label, but only IPTC fields, like: title - notes - keywords - date - author etc. I can search where keyword (contains, doesn't contain, equals, begins etc ...

I would like to search only for images that do not have iptc metadata, for example: where the keywords field is empty.
Can you help me?
thanks