Home : File Types : XLL File

.XLL File Extension

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File TypeExcel Add-In File

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CategoryPlugin Files


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


Contains extra functions, templates, or other tools that enhance the capabilities of Microsoft Excel; similar to a standard .DLL file (Dynamic Link Library), but is specifically written for MS Excel.

Programs that open XLL files
Microsoft Windows LogoWindows
Microsoft Excel 2016
Mac OS X LogoMac
Microsoft Excel 2016
Updated 2/16/2007