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.XLL File Extension

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.

What is a XLL file?

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.

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Programs that open XLL files
Microsoft Excel 2016
Microsoft Excel 2016
Updated 2/16/2007

.XLL Extension Information

This page contains information about the file extension XLL and its known file associations. Our goal is to help you understand what a *.xll file is and how to open it.

The Excel Add-In file type, file format description, and programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and do not publish any information we have not verified.

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