XLSX Converter

Convert to XLSX format online, for free.



Choose Files
  • From Device
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Password to open the source file (Maximum 255 characters).


How to Convert to XLSX?

  1. Click the “Choose Files” button to select your files.
  2. Convert to XLSX by clicking the "Convert" button
  3. Once the conversion finishes, click the "Download XLSX" button to save the file.

Convert Any File

FreeConvert supports 500+ file formats. Simply upload your files and convert them to XLSX format. Alternatively, you can upload XLSX files and convert them to a different format. All from the convenience of one tool!

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).

Free & Secure

Our 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 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 XLSX files to these other formats:

While this page can convert any Document to XLSX, you may wish to visit following Converter pages that only support specific conversions


Your Data, Our Priority

At FreeConvert, we go beyond just converting files—we protect them. Our robust security framework ensures that your data is always safe, whether you're converting an image, video, or document. With advanced encryption, secure data centers, and vigilant monitoring, we've covered every aspect of your data's safety.

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