XLB File Extension

Excel Toolbars Format

File Type xlb
Developer Microsoft
Popularity
4.5 (41 vote)
Application Microsoft Excel
Category Settings Files, Data Files
Format Binary

What is a XLB file?

Excel Toolbars Format works with the XLB file extension and is classified under Settings Files and Data Files, with a total of 7386 files.

With the creation of the Excel Toolbars Format (XLB), Microsoft introduced file format along with 242 programs built for their use.

XLB files are compatible with various operating systems, including Windows, Mac OS and Linux. You can open a XLB file using one of 3 programs, for example Microsoft Excel, Microsoft Office and Microsoft 365.

MIME types

application/x-msexcel
application/excel
application/x-excel
application/vnd.ms-excel

Windows

Mac OS

Linux

Microsoft 365

How to open a XLB file?

The most common reason why a XLB file cannot be opened is the absence of required software. To fix this, select a compatible program from the list. Then visit the official developer website via the provided link, download the program, and install it on your system.

Microsoft Excel, Microsoft Office and Microsoft 365 are among the most widely used programs for handling XLB files. If you wish to install the latest release of Microsoft Excel, visit the official Microsoft portal and download the edition that works on any operating system.

Following installation, XLB files should be automatically opened with Microsoft Excel.

Set Microsoft Excel as the default XLB application

Change the default app that opens a file on Mac

Right-click or use Control + Left-click on the desired XLB file to open a menu where you can choose from multiple actions;
Choose "Open in Application" and click "Other";
Look at the bottom of the window, where you will see the "Enable" menu. "Recommended Programs" will be selected as the default option;
Within this menu select "All Programs" and navigate to Microsoft Excel. Check the box next to "Always open in app" to make sure it’s the default option.

Change default programs in Windows

Start the process by right-clicking on your XLB file and selecting "Open With". From there, click "Choose another app" to continue;
From the options listed in the pop-up window, specifically choose Microsoft Excel as the application to handle your XLB file;
Be sure to check the "Always use this app" checkbox and click "OK" to save your preference.

Troubleshooting guide for XLB file complications

When issues arise with XLB files, they can generally be fixed with small software tweaks. Use the troubleshooting tips below to help resolve them.

What are the possible solutions to recover a corrupt XLB file?

Start a recovery program, open the damaged XLB file and then select the "Repair" menu item to start the repair procedure. Wait for the recovery process to finish, allowing automatic repair of damaged settings files.

How can I confirm if my XLB file has been damaged?

The signs of corrupted XLB settings files can manifest as:

The file shows slow performance when edited in Microsoft Excel;
The file stops responding or freezes in Microsoft Excel or other programs;
The file does not respond or shows errors when opening it;
Unexplained XLB file size inflation;
The file operation is accompanied by the display of error messages;

What are the possible causes of Microsoft Excel crashing?

Lack of regular software updates can cause Microsoft Excel to crash. Make sure you have installed the latest updates for Microsoft products.

Restarting your computer is a crucial troubleshooting measure that can alleviate numerous common problems. Therefore, it is advisable to restart your computer before modifying any settings related to the software.

How to edit a XLB file?

To modify XLB files, it is necessary to install dedicated software that lets you open and edit settings files. Online XLB editors generally offer fewer tools compared to programs designed for Excel Toolbars Format.

Best XLB Editor Software in 2026

Taking into account the provided details, we have prepared a list of XLB editors that match your needs.

XLB Editor Software	Developer	Platforms	Overall Rating
Microsoft Excel	Microsoft	Windows, Mac OS, Apple iOS, Android	4.4 out of 5 (39 reviews)

‹ XLB4 | XLA_ ›