ConvertRS Private browser tools
ES
Local, private conversion

Convert XLSB to XLSX without opening Excel

Choose an XLSB workbook and create an editable XLSX locally, with no Excel installation, upload, or account.

Stays in your browser Adjust before saving PDF Studio included
Common source formats
AVIFBMPCSVDOCXGIFHTMLICOJPG

How to convert XLSB to XLSX

Convert XLSB to XLSX automatically after choosing a file, without opening Microsoft Excel. ConvertRS reads the binary workbook in a browser worker and writes its tabular values to a new XLSX worksheet on your device.

Steps

  1. Drop or choose your XLSB workbook.
  2. Keep XLSX as the result format; conversion starts locally after you choose the file.
  3. Preview the detected table when available, then download the XLSX without uploading your workbook.

Best for

  • Opening XLSB table data in apps that accept XLSX but not binary workbooks.
  • Converting XLSB to XLSX without opening Excel or sending the workbook to a server.
  • Preparing a local XLSX copy for Google Sheets or another spreadsheet tool.

What changes

  • Tabular values are written to the first worksheet in a new XLSX file.
  • Source formatting, formulas, charts, images, comments, and macros are not included.
  • The source XLSB remains unchanged on your device.
Can I convert XLSB to XLSX without opening Excel?

Yes. Choose the XLSB file in ConvertRS and the browser creates a new XLSX locally; Microsoft Excel is not required.

Is the XLSB to XLSX conversion automatic?

Conversion runs automatically after you select the file and confirm the available XLSX result. It does not watch folders or batch-convert files in the background.

Can I open the converted XLSX in Google Sheets?

Yes. Upload the downloaded XLSX to Google Sheets. Check the result first because source formatting, formulas, charts, images, comments, and macros are not preserved.

Is my XLSB workbook uploaded?

No. ConvertRS reads the XLSB and writes the XLSX locally in your browser, so the workbook stays on your device.