WebCopier copies websites as they are seen in a browser. This may be different from server-side source code, which is protected by web server.
Also, WebCopier provides one-click printing functionalty, but it prints web
pages as seen in a browser, not the source code.
But, since WebCopier copies websites to your computer and stores
downloaded pages in their original format, you can always open
downloaded sites in a web browser and view / print source code from
there.
I'd suggest that you download Trial version and check if it meets your
requirements.