.ADDIN File Extension

File Type:
Visual Studio Add-in Definition File

Having trouble opening .addin extension? Don't panic! This page explains what addin files are as well as suggests programs you may use to open addin files. You can download these programs through this page.

What is an ADDIN file?

Addin file extension has Visual Studio Add-in Definition file type, developed by Microsoft, which is associated with the "developer files" category.

Used by Microsoft Visual Studio, the file is automatically created once there is a new add-in project, generated with the Add-In Wizard. The file stores data essential for displaying the add-in info while running Visual Studio's Add-In Manager.

ADDIN files are also needed when registering any new add-ins in the Add-In Manager. Those may be found in the folder, which has been generated for the add-in project. XML formatting is typically used for saving ADDIN files.

To learn how you can open the given file, read the information below.

addin file icon
File Type:
Visual Studio Add-in Definition File
Developer Files

How to open ADDIN file?

Double click the addin file to open it. The file will open automatically if file associations have been correctly installed and there is a proper program on your computer; if not, file associations may be corrupted and your OS either cannot find the proper program, or you might not have one for opening the file. First, we recommend downloading our utility to fix file association errors; then, you can download any program for opening the .addin extension from the ones suggested below. If you are certain there is nothing wrong with the file associations, you may proceed to method 2 right away; besides, if you can't make up your mind when choosing the right program, use Universal File Viewer from the last method.

Method 1: Fix file association errors

Follow these steps in order to automatically fix the addin extension associations' problem in no time:

  • Step 1: Click on "Download Solution" to download automatic tool provided by WikiExt.
  • Step 2: Click "Start Scan" to identify all potential issues.
  • Step 3: Review scan results and click "Fix Items".

File Size: 3.04 MB, Download time: < 1 min. on DSL/ADSL/Cable

This Tool is Compatible With: Windows XP, Vista, 7, 8/8.1, 10

Method 2: Download the appropriate software

The given list provides programs which may be used for opening or converting the addin file. Choose the proper program for your OS, and click it to start the download or proceed to the developer's website.

Programs that open ADDIN files

Method 3: Use universal file viewer

In addition to the list of programs above, we recommend using Universal File Viewer. This tool can open over 250 file extensions and, most likely, it will be able to open the addin file as well. Download Universal File Viewer for your OS.

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