What is a XLSB file?
A .XLSB file is a Microsoft Excel Binary Spreadsheet created by Microsoft. Unlike standard .XLSX files that use an XML structure, .XLSB files store data in a binary format. This makes them faster to read and write, especially for very large spreadsheets.
Sometimes, a .XLSB file is an encrypted spreadsheet protected by Fasoo DRM. Because .XLSB files can have different possible meanings, we recommend using viewer.online/xlsb to identify the actual format of your file.
How to open XLSB files?
You can open .XLSB files using Microsoft Excel on Windows or macOS. Alternative spreadsheet software like LibreOffice Calc and Google Sheets also support this format. If the file uses Fasoo DRM, you need the specific Fasoo client software to open it.
Software and tools
Developers often use data analysis libraries to process .XLSB files. In Python, you can use the `pyxlsb` engine with the Pandas library to read binary spreadsheet data. If you need to share the data with users who do not use Excel, you should convert the file. You can convert .XLSB files to standard formats like .XLSX, .CSV, or .PDF using convert.guru.
Best practices and troubleshooting
Binary spreadsheets can contain macros. Always verify the source of a .XLSB file before you open it on your computer. If your software fails to load the file, it might be corrupted or encrypted with digital rights management (DRM). viewer.online/xlsb analyzes .XLSB files to identify their exact format and creator software, shows which programs can open the file, and usually previews it.
Summary
viewer.online/xlsb directly opens and previews .XLSB files in the browser, eliminating the need to install software or troubleshoot compatibility issues.