XLL File Extension

The XLL file extension was created by Microsoft and is also known as the Excel Add-In File. XLL is classified as a Plugin Files and This File type categories under Zip, Text, Binary and XML, however, the format of this file format has not been determined yet. You can open XLL files in Microsoft Excel program.

Excel Add-In File Type

Excel Add-In File Type
Extension .xll
Developer Microsoft
Popularity 5.0 (123 Votes)
Mime Type application/excel
Default Program Microsoft Excel
Category Plugin Files
Format Binary
Updated 7/1/2025

What is a XLL File Type?

Free Online XLL Tools & Apps

Access powerful and secure free online XLL tools to convert, view, edit, merge, split, and compare XLL files — all without installing any software. Our tools support the .XLL (Excel Add-In File) file extension and run smoothly in any modern browser.

Select a tool below to explore features and manage your XLL files directly from your device with ease.

XLL Files Common Issues

There are few common issues with the Excel Add-In File .XLL File Extensions while opening the .XLL files on Windows and MacOs, we have solution to those issues such as:

Can't Open XLL Files?

  1. You must have supported software programs installed for Excel Add-In File on your system such as Microsoft Excel.
  2. Associate default Microsoft Microsoft Excel program for *.xll (Excel Add-In File) files.

    Associate XLL Default Program on Windows
    1. Right-click a *.XLL (e.g example.xll) file and click Open With.
    2. In the Open with dialog box, click Microsoft Microsoft Excel program Or click Browse to locate the program (*.exe) that you want.
    3. Select check box for Always use this app to open .xll files.

    Associate XLL Default Program on MacOs
    1. Click *.XLL (e.g example.xll) file and click information -> Open With.
    2. In the programs list, click Microsoft Microsoft Excel program Or other appropriate program that you want.
    3. Confirm Change for all... and Contine.
    4. A message will appear "This change will be applied to all files with .Microsoft Excel extension. By clicking Continue you confirm your selection", click Contine to apply changes.

All Platform Software Programs for XLL File Extension

List of all softwares that can open the XLL files on each platforms such as Windows, Mac, iOS, Linux, Web and Android, you may click the each software link for more details for other supported formats for each software and the verified direct download links for each software with complete lisensing details.

Microsoft Windows logo image Open XLL File on Windows

Software License Developer
Microsoft Excel image. Microsoft Excel 365 for Windows Commercial Microsoft
Microsoft Office image. Microsoft Office 2019 for Windows Commercial Microsoft

MacOs logo image - FileProInfo.comOpen XLL File on Mac OS

Software License Developer
Microsoft Excel image. Microsoft Excel 365 for MacOs Commercial Microsoft
Microsoft Excel for Mac image. Microsoft Excel for Mac 2019 for MacOs Commercial Microsoft
Microsoft Office image. Microsoft Office 2019 for MacOs Commercial Microsoft

Linux logo image - FileProInfo.comOpen XLL file on Linux

Software License Developer

Website logo image - FileProInfo.comOpen XLL file on Web

Software License Developer

iOS logo image - FileProInfo.comOpen XLL file on iOS

Software License Developer

Android logo image - FileProInfo.comOpen XLL file on Android

Software License Developer

About Licensing

  1. Free Trial This software are often used for an attempt period, like 14 days, before requiring payment. Some trial versions have a reduced feature set.
  2. Free This software is liberal to use. Examples include open-source , freeware software, like free programs supported by advertising.
  3. Free+ This software is liberal to download and use, but contains in-app purchases (IAP) to unlock additional content or functionality.
  4. Paid This software must be purchased so as to use it. it's going to be offered as a perpetual license or ongoing subscription.
  5. Included with OS This software is bundled with an OS , like Windows, macOS, or Android.

XLL file extension icon image.About XLL - Excel Add-In File

FileProInfo is to help you understand about the Excel Add-In File with *.XLL suffix, and provide the complete detail as how to open, edit, convert, merge, split and compare it with other related software programs, software download links and free online apps and tools.

Our professional team members at FileProInfo have been individually researched and verified the details for XLL. We want to be 100% accurate and publish the information about file formats, tools, apps and software programs that we have tested and validated.

If you would like to suggest any additions or updates to this page for XLL, please let us know.

Updated 7/1/2025