Part of the digital toolset of SavantTools.com  
Convert Unicode to ASCII
Convert Unicode characters to their ASCII equivalents. Example: "234" becomes "234". Any character without an equivalent representation in ASCII encoding will become a question mark.
input text
ASCII
Size limit 4,000 characters. Conversion requires a trip to the server, but no data is stored.  I'd prefer to do it in JavaScript on the client, but not enough to research. If you have a tip, please let me know.

Action link: http://savanttools.com/unicode-to-ascii.asp?txt=<unicode string>

Related:  Unicode to Character Entity