Online XLS Converter

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Information about XLS file format

Name XLS
Full name XLS - Microsoft Excel Binary File Format
File extension .xls
MIME type application/vnd.ms-excel
Developed by Microsoft
Type of format Spreadsheet
Description Microsoft Excel up until 2007 version used a proprietary binary file format called Excel Binary File Format (.XLS) as its primary format. Excel 2007 uses Office Open XML as its primary file format, an XML-based format that followed after a previous XML-based format called "XML Spreadsheet".
Technical details OpenOffice.org has created documentation of the Excel format. Since then Microsoft made the Excel binary format specification available to freely download.
Associated programs Microsoft Office, LibreOffice, Kingsoft Office, Google Docs.
Wiki https://en.wikipedia.org/wiki/Microsoft_Excel#File_formats