XLS to XLSX Converter
Convert XLS to XLSX online, for free.
- From Device
- From Dropbox
- From Google Drive
- From OneDrive
- From Url
By proceeding, you confirm you own the rights to the files you upload and agree to our Terms of Use.
How to Convert XLS to XLSX?
- Click the “Choose Files” button to select your XLS files.
- Click the “Convert to XLSX” button to start the conversion.
- When the status change to “Done” click the “Download XLSX” button
Easy to Use
Simply upload your XLS files and click the convert button. You can also batch convert XLS to XLSX format.
Best Quality
We use both open source and custom software to make sure our conversions are of the highest quality. In most cases, you can fine-tune conversion parameters using “Advanced Settings” (optional, look for the icon).
Free & Secure
Our XLS to XLSX Converter is free and works on any web browser. We guarantee file security and privacy. Files are protected with 256-bit SSL encryption and automatically deleted after 8 hours.
Excel 97-2003 Workbook (XLS) is the original binary spreadsheet format of Microsoft Excel, built on the Binary Interchange File Format and used as the default until Excel 2007. An XLS stores worksheets, formulas, charts, and formatting in one proprietary file, and it can also carry VBA macros. Its main limitations are a ceiling of 65,536 rows per sheet and a greater risk of file corruption than the newer XLSX.
How to open an XLS file?
Current versions of Excel still open XLS in Compatibility Mode and offer to upgrade the file to XLSX.
LibreOffice Calc, Google Sheets, and Apple Numbers all read XLS. Because XLS files can contain macros, treat unexpected attachments with caution. Converting your archive keeps it safe and compact — our XLS to XLSX and XLS to PDF tools handle the job.
Developed by: Microsoft
Initial Release: 1987
Excel Open XML Workbook (XLSX) is the default spreadsheet format of Microsoft Excel since the 2007 release. An XLSX file is a ZIP package of Office Open XML parts describing worksheets, formulas, charts, and formatting. Compared with the old XLS format it is substantially smaller, supports over a million rows per sheet, and cannot contain macros — a deliberate safety measure.
How to open an XLSX file?
Microsoft Excel opens XLSX natively, and Excel for the web opens it in a browser with a Microsoft account.
Google Sheets, LibreOffice Calc, and Apple Numbers all preserve formulas and most formatting. Very complex workbooks with pivot tables or advanced charts are safest in Excel itself. To share data without letting recipients change it, convert the workbook with our XLSX to PDF tool.
Developed by: Microsoft
Standard: ECMA-376 / ISO/IEC 29500
Initial Release: 2007
Freeconvert.me can convert your other files to XLSX format:
Freeconvert.me can convert your XLS files to these other formats:
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