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.xlsx Microsoft Excel workbook

XLSX Converter

XLSX is the Excel spreadsheet format with multiple sheets, formulas and formatting. Google Sheets, Numbers and LibreOffice open it too.

  • No upload — 100% private
  • Fast, lossless when possible
  • Free & unlimited
  • Works on iPhone & Android

    XLSX at a glance

    Full nameMicrosoft Excel workbook
    Extension.xlsx
    Opens on iPhone◐ Partly / with an app
    Opens on Android◐ Partly / with an app
    Opens on Windows✓ Yes
    Opens on Mac◐ Partly / with an app

    XLSX is best for spreadsheets, accounts and data tables.

    Convert XLSX to…

    XLSX to XLSXLSX to ODSXLSX to CSVXLSX to JSONXLSX to HTMLXLSX to PDF

    Convert to XLSX from…

    XLS to XLSXODS to XLSXCSV to XLSX

    Frequently asked questions

    What is a .xlsx file?
    XLSX is the Excel spreadsheet format with multiple sheets, formulas and formatting. Google Sheets, Numbers and LibreOffice open it too.
    Is converting XLSX files here private?
    Yes. Files are processed in your browser and never uploaded.