Microsoft Excel 98 for Mac toolbar file
File type: Settings, options, themes or skins file
The XLB8 file extension identifies a toolbar settings file used by Microsoft Excel 98 for Mac.
The file stores toolbar configuration information for the Excel application rather than spreadsheet data.
File type category:
Settings, options, themes or skins file
Date updated: September 27, 2026
XLB8 is a legacy settings file format associated with Microsoft Excel, Microsoft's spreadsheet application. Excel 98 for Mac used XLB8 files to store toolbar customizations and related toolbar configuration.
An XLB8 file is an application settings file, not an Excel workbook. The related xlb is the default extension used by Microsoft Excel for toolbar files.
The format belongs to the classic Mac version of Excel and is no longer commonly used. Current releases of Microsoft Excel and Microsoft Office for Mac may not support XLB8 files directly.
Open an XLB8 file with Microsoft Excel 98 for Mac, the application for which it was created. It is a toolbar settings file, so Excel may load it as configuration data rather than display it as a document.
Modern versions of Microsoft Excel and Microsoft Office for Mac may not recognize this legacy format. If the original application is unavailable, the file may not be usable directly.
XLB8 files are toolbar settings files and do not have a meaningful document conversion to a workbook or another common file format.
To use the toolbar customizations in a newer version of Excel, open the file in a compatible legacy version if possible and recreate the toolbar settings manually in the newer application.
Software applications that handle other tasks involving xlb8 files:
Microsoft Windows
Apple macOS / Mac OS X
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