Convert EXCEL to ODT online for free
1: Choose multiple local EXCEL files or enter the URL of an online EXCEL file. 2: Choose "ODT" as target format and set options (optional). 3: Click the "START CONVERSION" button to convert EXCEL files to ODT online.
Choose filesChoose files or enter remote file URLenter remote file URL
Set conversion options (optional)
Microsoft Excel Binary File Format
File extension: .xls
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".
File extension: .odt, .fodt
The Open Document Format for Office Applications (ODF), also known as OpenDocument, is an XML-based file format for spreadsheets, charts, presentations and word processing documents. It was developed with the aim of providing an open, XML-based file format specification for office applications.