What Is Microsoft.office.interop.dll & How to Download It

This article explores everything you need to know about Microsoft.office.interop.dll and shows you the best way to download it on your Windows computer.

Like every other DLL file, this file contains essential code or instructions for performing various processes on a computer.

Before getting into it, you may also want to refer to our guide that explores all you should do if you have missing DLL files on Windows 11.

What is Microsoft Office Interop Excel DLL?

Interaction among applications is one role that DLLs fulfill, and the Microsoft Office Interop Excel DLL serves this role as relates to the Excel application. It is a .Net file containing a set of classes and interfaces that help you use the Excel spreadsheet.

The library helps developers to read/write and perform complex manipulation of the MS spreadsheet. Some of its most important uses include the following:

• Visualizing data – It is essential for creating visual representations in spreadsheets, such as pivot tables, graphs, and charts.
• Analyzing data – It helps devs to read and analyze huge data from the spreadsheet with functions like filtering, sorting, and aggregation.
• Data migration – It aids data transfer from Excel to other applications, especially for storage.
• Automation and data integration – With the DLL, devs will perform automation for reports, and these can be integrated with other .NET programs.
• Reporting – Devs use the DLL for report generation, a useful feature for businesses and large organizations.

Since we have established how useful this file is, let us explore how you may download it.

How do I download microsoft.office.interop.dll?

1. Using specialized DLL tools

Using specialized tools is the most recommended solution to downloading the .NET DLL file. This is because they automate the process and will be helpful if you encounter any DLL-related problems.

This is because microsoft.office.interop.dll is native to Windows OS, and these tools guarantee 100% download success for files native to the operating system. With a single click, you should be well on your way.

2. Download from dll-files.com

1. Navigate to dll-files.com.
2. The topmost entries are the most updated versions. Click the Download link for one matching your system architecture.
   
3. Right-click on the downloaded ZIP file and select Extract All.
   
4. Lastly, you can copy the extracted Microsoft.Office.Interop.Excel.dll file and add it to any program’s installation folder that needs the DLL.

3. Download with Microsoft Office 2010: Primary Interop Assemblies Redistributable

1. Go to the Primary Interop Assemblies Redistributable download link.
2. Save the downloaded file.
   
3. Lastly, double-click PIARedist to install and follow the wizard.
   

The Primary Interop Assemblies Redistributable is one of Microsoft’s installer packages that contain microsoft.office.interop.dll. Once you successfully install this package, you will have the DLL installed on the article.

Any of these three solutions should work just fine, so feel free to try whichever feels the most convenient. While we encourage using some automatic DLL installer, as long as you complete the process successfully, this will not matter.