- Download the xdoc2txt tool from: http://ebstudio.info/home/xdoc2txt.html#download
- extract "xdoc2txt.exe" and locate it on your PATH folder
- edit your gitattributes as A:
- edit your gitconfig as B:
*.xls diff=xdoc2txt
*.xlsx diff=xdoc2txt
git config [--global | --local] diff.xdoc2txt.textconv 'xdoc2txt.exe -8'