FileUltimate uses the same DocumentViewer that comes with DocumentUltimate but there is a license difference in usage.
FileManager of FileUltimate has an integrated DocumentViewer which is opened when you double-click document files (or click Preview action in the context menu). But this DocumentViewer cannot be used standalone, it’s just part of the FileManager.
So FileUltimate has dependencies to our other products for enhancing the FileManager:
- Can use the DocumentViewer when DocumentUltimate DLL is available.
- Can create image thumbnails/viewers for much more image formats when ImageUltimate DLL is available.
- Can create video thumbnails only when VideUltimate DLL is available.
So the usage here is internal and isolated.
But when you need a standalone DocumentViewer which you put in your own host page and pass the document file to display, you will need a DocumentUltimate license. DocumentUltimate also has a DocumentConverter API which you can use even in non-web apps (Console, Winforms etc.).