The following excerpt is from an article posted August 4, 2015 at techcentral.ie:
Family Tree Analyzer is a portable free tool which can analyse a family tree (in GEDCOM form) and produce various reports on it.
You’ll first need to save your data in the GEDCOM format. If you’re using family tree software then you can probably do that via a Save or Export option. If your tree is on the web, then check the site for export features (at Ancestry, select Tree Pages > Tree Settings > Export Tree).
Launch Family Tree Analyzer, click File > Open and select your GEDCOM file. The program will then import and parse your data (previous versions displayed plenty of errors, but the process is now mostly fault-free), before presenting its analysis under various tabs.
