Not really. Processing xlsx files in full generality is basically reimplementing Excel, but if all you need to do is extract/modify values and formulas or produ

Not really. Processing xlsx files in full generality is basically reimplementing Excel, but if all you need to do is extract/modify values and formulas or produce a workbook excel will accept there's plenty of libraries that will do that, and it's not that crazy to just hack something up using an xml parser. I had to port some stuff that was using the google sheets API over to manipulating xlsx files instead, and it wasn't a big deal.