Honestly, at this point, I point people away from Excel. To provide spreadsheet information to OTHERS for review only, I do not send spreadsheets. I send PDFs. PDFs can be read by anyone anywhere and cannot be edited in any way. They are secure and simple.

I use a free PDF tool called PrimoPDF (PrimoPDF.com) that installs as a printer driver so I can make PDFs instantly from inside any program. PrimoPDF includes password protection and print suppression... all the things you would want from a PDF utility.

Our company stopped sending Excel files around years ago and we haven't been sorry, not once.