Home : File Types : XLSB File

.XLSB File Extension

File TypeExcel Binary Spreadsheet

3.7 (27 Votes)
CategorySpreadsheet Files


This file is saved in a binary format, which requires a specific program to read its contents.

What is an XLSB file?

An XLSB file is a spreadsheet file created by Microsoft Excel, a program used to create and edit spreadsheets. It contains a spreadsheet of cells arranged by a grid of rows and columns, as well as charts, macros, and formatting. XLSB files are saved in a binary format.

More Information

Screenshot of a .xlsb file in Microsoft Excel 2016

XLSB file open in Microsoft Excel 2016

XLSB files differ from standard Open XML format (.XLSX) spreadsheets since they store the spreadsheet using a binary format (BIFF12). You will most likely see and use the XLSX file more often because it is compress to save space and is easier to share with other users. XLSB files are not compressed, making them larger in size than XLSX files. However, XLSB files may perform more efficiently within Excel because they are saved in the larger binary format.

NOTE: XLSB files may be opened by Excel 2007 or later, or by earlier versions of Excel with Open XML support.

Open over 300 file formats with File Viewer Plus.
Programs that open XLSB files
Updated 12/2/2016

About XLSB Files

Our goal is to help you understand what a file with a *.xlsb suffix is and how to open it.

The Excel Binary Spreadsheet file type, file format description, and Mac, Windows, and Linux programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.

If you would like to suggest any additions or updates to this page, please let us know.