XLS to XLSX Converter
DevConverter is an online document and spreadsheet converter. Amongst many others, we support PDF, XLSX, XLS, CSV, ODS. Thanks to our advanced conversion technology the quality of the output will be exactly the same as if the file was saved through the latest Microsoft Office 2019 suite.
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XLS
XLS is Microsoft Excel spreadsheet file that stores data and manipulates several mathematical operations. It uses a visual basic operation to implement several numeric functions. This spreadsheet file is supported by most of the open source or proprietary spreadsheet software.
XLSX
XLSX is a proprietary spreadsheet file of Microsoft Excel that contains data. It contains data in rows or columns as well as charts. XLSX supports several mathematical functions also. It uses Open XML standard for containing data. It supports MS Office 2007 and above versions.