Excel 2007 workbook: .xlsx
Excel 2007 workbook that contains Visual Basic for Applications (VBA) code: .xlsm
Excel 2007 workbook with a binary format for large or complex workbooks: .xlsb
Excel 97 to Excel 2003 workbook: .xls
XML document: .xml
Web page as a single file with an .htm file: .mht; .mhtml
Web page as a folder with an .htm file: .htm; .html
Excel 2007 template: .xltx
Excel 2007 template that includes preapproved macros: .xltm
Excel 97-2003 template: .xlt
Text file with tabs between the data: .txt
Excel workbook 2003 with the XML format: .xml
Excel workbook in the Excel 5.0/95 version: .xls
Text file with commas separating data: .csv
Text file with spaces separating data: .prn
Text file with commas separating data: .csv
Text file with a header and body: .dif
File divided into records by a return or Enter key: .slk
Excel 2007 add-in: .xlam
Excel 97-2003 add-in: .xla
File format developed by Adobe: .pdf
XPS Document Format:.xps