Tools / File Converter / XLSB to CSV Converter

XLSB to CSV Converter

Convert XLSB files to CSV. Free and without uploading.

This tool converts XLSB files to CSV. Binary Excel workbook.

CSV stores table data as plain text: one record per line, values separated by commas or semicolons. It carries no formatting or multiple sheets. CSV holds one sheet, so each sheet in the workbook becomes its own CSV file.

Conversion happens inside your browser; your files are never sent to a server.

How to use

1. Drag and drop your XLSB files, paste them, fetch one from a link, or use "Choose files".
2. The target format is preselected; you can add several files at once.
3. Press "Convert" and download the CSV files.

Frequently asked questions

Is anything lost when converting XLSB to CSV?

The content is kept; formatting the target format doesn’t support (such as colours or fonts) may be lost.

How many files can I convert at once?

There is no limit. Download the results one by one or as a ZIP.

Are my files uploaded?

No. Your XLSB files are converted to CSV inside your browser.