XLB vs XLSB vs XLSM vs XLSX: Complete Excel Format Guide
Excel’s filename extensions look like alphabet soup: .XLSX, .XLSM, .XLSB, .XLB. What’s the difference? When should you use each? And crucially—does it affect your file size, speed, or ability to share files?
This comprehensive guide breaks down all four formats so you can choose the right one for your situation.
