File extensions starting with X
- File Extension X
- File Extension X32
- File Extension XA
- File Extension XBIN
- File Extension XBK
- File Extension XDR
- File Extension XDS
- File Extension XDW
- File Extension XEX
- File Extension XFD
- File Extension XFDL
- File Extension XHASH
- File Extension XHTML
- File Extension XIF
- File Extension XL
- File Extension XLR
- File Extension XLS
- File Extension XLSX
- File Extension XLT
- File Extension XLW
- File Extension XML
- File Extension XMP
- File Extension XNK
- File Extension XPI
- File Extension XPS
- File Extension XPT
- File Extension XPW
- File Extension XSD
- File Extension XSLT
- File Extension XSPF
- File Extension XST
- File Extension XTM
- File Extension XVI
- File Extension XVID
- File Extension XVM
- File Extension XXX
- File Extension XY
- File Extension XYV
- File Extension XYZ
