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XLSB XLSX
Free online converter

Convert XLSB to XLSX

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XLSB to XLSX converterFREE
Drop a .XLSB file here
or pick one - we convert it to .XLSX and give you the file to download

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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How to convert XLSB to XLSX

  1. Add your .XLSB file - drop it in the box above or click to browse.
  2. Convert it to .XLSX in a few seconds.
  3. Download your new .XLSX file.

What to expect

  • VBA macros are silently dropped when saving to .xlsx - if the workbook runs macros, save as .xlsm to keep them.
  • Formulas, charts, and pivot tables survive the conversion intact; only the file container changes from binary to XML.
  • XLSB files are typically smaller than .xlsx - after converting, expect file size to increase, sometimes significantly for large workbooks.

Frequently asked questions

Does converting XLSB to XLSX lose any data?
No - formulas, charts, and pivot tables are preserved. The only exception is VBA macros, which .xlsx cannot store; save as .xlsm if you need to keep them.
Can I convert XLSB without Microsoft Excel?
Yes. LibreOffice Calc (free, all platforms) and Google Sheets (free) both open .xlsb and export .xlsx without needing Excel installed.
Why does my file get larger after converting to XLSX?
XLSB stores data as compact binary records; .xlsx stores the same data as XML text, which is more verbose - a 10 MB .xlsb can become 20-40 MB as .xlsx.
Can Apple Numbers open XLSB files?
No - Numbers cannot open .xlsb directly. Convert to .xlsx first using LibreOffice Calc or Google Sheets, then open in Numbers.
Learn about the formats: .XLSB · .XLSX
Programs that convert XLSB: Microsoft Excel · Microsoft Excel for Mac · Apache OpenOffice Calc (OpenOffice.org Calc) · LibreOffice Calc