XLS to XLSX converter

Convert XLS to XLSX

This online document converter allows you to convert your files from XLS to XLSX in high quality. We support a lot of different file formats like PDF, DOCX, PPTX, XLSX and many more. By using the online-convert.com conversion technology, you will get very accurate conversion results.

xlsx converter

xlsx converter
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Try the XLSX conversion with a XLS test file

Not convinced? Click on the following link to convert our demo file from XLS to XLSX:
XLS to XLSX conversion with our XLS example file.

XLS (Microsoft Excel Spreadsheet)

XLS is the file format extension for Microsoft Excel files. The XLS extension was used until the 2007 version of Excel and was replaced by an Open Office XML file format (XML Spreadsheet, or XMLSS). Excel 2007 is backwards compatible and reads many file formats from DOS-based programs. Excel is often used by third-party applications (like browsers) to avoid implementing the use of binary file...
What is XLS

XLSX (Microsoft Excel Open XML Spreadsheet)

XLSX files are produced by the applications of Microsoft's 2007 Office suite, namely by the product called Microsoft Excel, a spreadsheet processing software that is known all around the globe. As a very efficient tool, Excel can format and create spreadsheets and graphs, as well as processing complex mathematics queries among others. Diverse spreadsheets with various data sources, formulas,...
What is XLSX