Open XLS File

Microsoft Excel File Extensions

Below is a list of all spreadsheet file extensions currently supported by Excel:

• XLSX - Office Open XML file format. XLSX file is a compressed file with multiple XML parts located in several subfolders. XLSX file can also contain other types of content like images.
• XLSM - Same file format as XLSX but with Macros enabled by default. Be cautions when opening files with XLSM file extension because they may contain malicious code.
• XLSB - XLSB files are based on the same file specification as XLSX but data inside them is stored in binary format which may improve performance in certain cases.
• XLTM - Office Open Macro-Enabled Template File.
• XLAM - Excel add-on file
• XLS - CFBF based binary file format. Was main file format for Excel until Excel 2007.
• XLA - VBA add-in for Excel
• XLB - Microsoft Excel custom toolbar settings file
• XLC - File with Excel Chart only. Source data used to create the chart is not saved in this file format.
• XLL - Microsoft Excel add-in in portable executable format. Similar to DLL file.
• XLM - Microsoft Excel macros file.
• XLT - Microsoft Excel template file.
• XLV - Microsoft Visual Basic module file for Microsoft Excel
• XLW - Workspace arrangement settings file for Microsoft Excel
• ODT - OpenDocument file format