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XLSB CSV
Free online converter

Convert XLSB to CSV

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XLSB to CSV converterFREE
Drop a .XLSB file here
or pick one - we convert it to .CSV 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 CSV

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

What to expect

  • CSV holds one sheet at a time - a multi-sheet .xlsb workbook needs one export per sheet.
  • Formulas are replaced by their computed values; the formula logic itself is not stored in CSV.
  • Formatting, charts, merged cells, and pivot tables are stripped - only raw cell values survive.

Frequently asked questions

Does the CSV keep column headers?
Whatever is in row 1 of the active sheet becomes row 1 of the CSV - there is no separate header setting.
Can I convert XLSB to CSV without Excel?
Yes. LibreOffice Calc and Google Sheets both open .xlsb files for free.
Why do my columns appear merged in the CSV?
Some locales default to semicolon as delimiter. In Excel, import via Data > From Text/CSV and explicitly set comma as the delimiter.
Does XLSB to CSV lose any data?
Only one sheet is exported at a time, formulas become values, and all formatting is removed - the raw data in cells is preserved.
Learn about the formats: .XLSB · .CSV
Programs that convert XLSB: Microsoft Excel · Microsoft Excel for Mac · LibreOffice Calc · Apache OpenOffice Calc (OpenOffice.org Calc)