Free Online XLSX to XLS Converter

Convert XLSX to XLS online from any device, with a modern browser like Chrome, Firefox.

Aspose.Cells Conversion

  • Supported Documents: XLSX
  • Save as: PDF, XLS, XLSX, XLSM, XLSB, CSV, JPG, HTML, ODS, BMP, PNG, SVG, TIFF, XPS

XLSXMicrosoft Excel Open XML Spreadsheet

XLSX is well-known format for Microsoft Excel documents that was introduced by Microsoft with the release of Microsoft Office 2007. Based on structure organized according to the Open Packaging Conventions as outlined in Part 2 of the OOXML standard ECMA-376, the new format is a zip package that contains a number of XML files. The underlying structure and files can be examined by simply unzipping the .xlsx file.

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XLSMicrosoft Excel Binary File Format

Files with XLS extension represent Excel Binary File Format. Such files can be created by Microsoft Excel as well as other similar spreadsheet programs such as OpenOffice Calc or Apple Numbers. File saved by Excel are known as Workbook where each workbook can have one or more worksheets. Data is stored and displayed to users in table format in worksheet and can span numeric values, text data, formulas, external data connections, images and charts.

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How to convert a file using Aspose.Cells Conversion App

  • Click inside the file drop area to upload a XLSX file or drag & drop a XLSX file.
  • Your XLSX file will be uploaded and will be converted to required XLS format.
  • Download link of XLS file will be available instantly after conversion.
  • You can also send a link to the XLS file to your email address.
  • Note that file will be deleted from our servers after 24 hours and download links will stop working after this time period.

Fast and Easy Conversion

Upload your document, choose the save format type and click on “Convert” button. You will get the download link as soon as the file is converted.

Convert from Anywhere

It works from all platforms including Windows, Mac, Android and iOS. All files are processed on our servers. No plugin or software installation required for you.

Conversion Quality

Powered by Aspose.Cells. All files are processed using Aspose APIs, which are being used by many Fortune 100 companies across 114 countries.

Other Supported Conversions

You can also convert XLSX into many other file formats. Please see the complete list below.