If you have two similar Excel spreadsheets, or different versions of the same original spreadsheet, it can be useful to compare the Excel files and see how they differ. If the spreadsheets are ...

Compare and merge office documents Most non-programmers don't work in text files, but WinMerge can also compare proprietary file formats, like Microsoft Office files.

Microsoft Excel has several features designed to help you recover unsaved versions of files and prevent data loss.