The .xls filename extension is a native binary file format associated with the closed source spreadsheet application Microsoft Office Excel. First introduced in 1987 with the release of Excel 2.x, the file format acts as the container for storing spreadsheet data such as work sheets, charts, and macros. Prior to Microsoft Office Excel 2007, the xls binary format was the default standard for the Microsoft Office Excel until the later adoption of the Open Document standard .xlsx. Documents to be saved in the .xls format are saved as Excel 97, 2003 documents.
OpenDocument Flat XML Spreadsheet
FreeFileConvert uses tuned encoding for XLS to FODS conversions, preserving clarity while trimming file size. Finished audio streams instantly across phones, tablets, desktops, and modern browsers without extra tweaks.
Upload XLS files from desktop, tablet, or cloud storage, queue multiple jobs, and let the converter finish autonomously. Return whenever convenient to download synchronized FODS results on any device you rely on.
Process up to 5 files sized 1000 MB per batch without splitting queues manually. Mixed-format uploads convert together, producing consistent FODS audio with dependable progress tracking.
.xls was extended to the Microsoft Office XML format spreadsheetML which was later succeeded by the Office Open XML specification. The format stores data as fixed sized streams and sub streams which contain cell records with actual user input cell data, formulas, cell properties, along with meta data about the file including information such as document author, date of creation, worksheet names etc. The main streams in the xls format are Workbook stream, Globals sub stream, and the worksheet sub stream.
Upload your document file in the XLS format from your device, Dropbox, or Google Drive.
Select FODS as the output format and click Convert. Adjust optional settings if needed.
Download the converted document file. Each file stays available for up to 5 downloads.