Corrupt xlsx2csv needs the Microsoft .Net version 2 framework. Corrupt xlsx2csv will extract and convert to CSV format worksheets from even damaged or corrupted Excel 2007 xlsx format files. It succeeds at doing so where Excel 2007 itself fails to salvage data. It can also be simply used as a viewer of the unformatted data in an xlsx file without having Excel 2007 installed. The program is coded in Perl/Tk and therefore has a GUI front end.