Convert XLSB to CSV Files Online for Free.
Free online tool to convert xlsb to csv files quickly and securely. No installation required – start converting your files in just a few clicks!
Drag and drop your files here or click to upload.
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Maximum file size is 10MB
How It Works
How to Convert XLSB to CSV
Click inside the file drop area to upload your XLSB file or drag & drop it.
Select CSV as the output format and click the 'Convert' button.
Download the converted CSV file instantly after conversion.
You can also send a link to the converted file via email. (Optional)
Convert Your XLSB files to other formats
RunConvert.com can convert your XLSB files to these other formats:
Convert Your XLSB files to other formats
Convert Files to XLSB Format
RunConvert.com supports these converters to XLSB format:
Convert Files to XLSB Format
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Frequently Asked Questions
Here are some common questions and answers about xlsb file conversions ask by our users on RunConvert.com.
Frequently Asked Questions
Q: What happens to merged cells during conversion?
A: Merged cells usually keep their formatting in XLSX and ODS. In CSV though? They’ll get split into separate cells.
Q: Can I convert spreadsheets on my phone?
A: Yes! RunConvert is mobile-friendly, so you can convert files straight from your phone’s browser—whether you’re team iPhone or Android.
Q: Does RunConvert have file size limits?
A: We allow generous file sizes, but there’s a cap (around 100MB for now). Most spreadsheets fall well under that, though.
Q: Can I preview the file before downloading the converted version?
A: On RunConvert, we’re working on adding that feature. For now, just download it—it’s super quick, and if it’s not right, you can tweak and reupload.
Q: Will pivot tables stay intact after conversion?
A: If you convert between Excel-compatible formats like XLSX or ODS, pivot tables should stay. CSV or PDF will flatten them to plain data.
Q: Why use spreadsheet conversion at all?
A: Sometimes you need a lighter file, better compatibility, or just a shareable version. Conversion keeps your data flexible and accessible.
Q: Why do I see weird characters after converting?
A: It’s likely a character encoding issue. Make sure your original file uses UTF-8 to prevent display glitches.
Q: Is spreadsheet conversion free on RunConvert?
A: Totally free. No hidden fees or credit cards—just a clean, simple conversion experience.
Q: Is there a difference between .xls and .xlsx conversion?
A: .XLS is older and bulkier. .XLSX is newer, smaller, and faster. We recommend upgrading during conversion when possible.
Q: What’s the most universal spreadsheet format?
A: CSV, hands down. It’s readable by almost every spreadsheet program, script, and database. It’s the Swiss Army knife of spreadsheet formats.
What is XLSB (Excel Binary Workbook)?
XLSB (Excel Binary Workbook) is a file format used by Microsoft Excel for storing spreadsheet data in a binary format. Unlike the more common XLSX format, which is XML-based, XLSB stores data in a binary structure, making it faster to open and save for large workbooks.
XLSB files are typically used for large and complex Excel workbooks that require faster processing and lower file sizes.
How to open XLSB?
XLSB files can be opened using Microsoft Excel (Excel 2007 and later). You can simply double-click the file to open it, or use the 'Open' option in Excel's file menu.
XLSB files are not compatible with some other spreadsheet programs like Google Sheets. However, they can be opened in Excel, which is the recommended program.
XLSB is Developed by: Microsoft
XLSB was Released on: 2007
Useful Links for XLSB:
How to convert XLSB?
You can convert XLSB files to other formats, such as XLSX, CSV, or PDF, using Excel or online file converters. Simply open the file in Excel and use the 'Save As' option to choose the desired format.
Many online tools allow you to upload your XLSB file and convert it to different formats, making it easier to share or edit the data in various applications.
What is CSV (Comma-Separated Values)?
CSV (Comma-Separated Values) is a simple text-based file format used for storing tabular data, such as spreadsheets or databases. Each line of a CSV file represents a row, and each value within a row is separated by a comma.
CSV files are commonly used for data exchange between different applications and are easily opened and edited by spreadsheet programs like Microsoft Excel, Google Sheets, and other data processing tools.
How to open CSV?
CSV files can be opened using spreadsheet programs such as Microsoft Excel, Google Sheets, or LibreOffice Calc. You can also open them using text editors like Notepad or Sublime Text, although they won't display the data in a table format.
To open CSV files in Excel or Google Sheets, simply double-click the file or import it into the application.
CSV is Developed by: International Organization for Standardization (ISO)
CSV was Released on: 1983
Useful Links for CSV:
How to convert CSV?
You can convert CSV files to other formats, such as Excel (.xlsx), JSON, or TSV (Tab-Separated Values), using online file converters. Simply upload your CSV file, choose the desired output format, and let the converter do the work.
Many spreadsheet applications like Excel also allow saving CSV files in various formats for easier use across different platforms and applications.
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