What is XLW File Extension?
Microsoft Excel app (2007/2010) stores data in XLW file extension. It holds the screen location of single or multiple workbooks with references of each workbook separately. The format is capable of storing new layouts while working on several workbooks. XLW holds only the layout instead of actual Excel workbook data. The file format is Binary.
It comes under data files or Misc files.
MS Excel for Windows and Mac
How to open or view XLW File Extension
Users can open the file using Microsoft Excel 2016