A downloadable version of the latest master index is found at:
https://isogg.org/tree/Indexdata.csv You also might be able to open it directly in a new window by right-clicking with your mouse.
It
is saved in the csv format (comma-separated version) which imports or
opens into a spreadsheet. Links shown in the first row will not
work.
If
you are using a Google Chrome browser and encounter an error message,
copying the link to a new incognito window will likely resolve the
problem.