XLS To XLSX Converter
Convert your XLS files to XLSX online & free
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XLS
to
XLSX
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How to convert XLS to XLSX
Step 1
Upload XLS
Select files from Computer, URL, Google Drive, Dropbox or by dragging it on the page.
Step 2
Choose to XLSX
Choose XLSX or any other format you need as a result (more than 200 formats supported)
Step 3
Download your XLSX
Let the file convert and you can download your XLSX file right afterwards
XLS
Microsoft Excel Worksheet Sheet (97-2003)
XLS format is used to refer to the documents of the program Microsoft Excel. This file is a spreadsheet. All document data distributed and stored in the cells. Each cell has a unique address, which is denoted by letters and Arabic numerals. The cell can contain fixed data, and data in the form of formulas, which bind more cells.
XLSX
Office Open XML Worksheet Sheet
XLSX is a file format created with Microsoft Excel, version from 2007 and younger. This file is a spreadsheet. All data distributed document and stored in the cells. Each cell has a unique address, which is denoted by the letters and Arabic numerals. XLSX file format is based on the Open XML. To reduce the size of the file is compressed ZIP.
Convert XLS to XLSX for Free
Pdfmall's XLS to XLSX converter is easy to use for free without any limitation and restriction. You don't have to register or hand in any personal info. Besides, you can even use this service on any device, at any time and anywhere.
File Security Protected
Your privacy means all to us. It's our priority to ensure its safety. None of your files or their contents will be used after the conversion. You can learn more about security from our Privacy Policy.
Conversion in The Best Quality
XLS to XLSX is not so difficult. But the quality is hard to guarantee. Fortunately, with our solutions, the best solutions provider on the market, our server can offer you the best quality to convert your XLS file to XLSX.
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