.NUPKG File Extension

There are 2 file types use the .NUPKG file extension:

  1. NuGet Package
  2. NetUpdate Package

1. NuGet Package

NuGet Package

A NUPKG file is a code package used by NuGet, a Microsoft Visual Studio component that allows developers to create and share packages for use in .NET projects. It contains packaged source code, as well as instructions for how to use that code. NUPKG files are built from .NUSPEC files, which are themselves built from .DLL assemblies.

Prior to 2012, developers had to manually install NuGet as an extension to Microsoft Visual Studio. But over time, NuGet and the NUPKG format proved so essential that Microsoft began installing NuGet Package Manager with Visual Studio by default. These days, developers share thousands of NUPKG files using NuGet.org and NuGet Package Manager. Popular NuGet packages include Microsoft Entity Framework, jQuery, and JSON libraries.

Generally, developers do not open NUPKG files. Instead, they import the files into Microsoft Visual Studio, so they can include the code contained within NUPKG files in their development projects.

To import a NUPKG file into Microsoft Visual Studio:

  1. From the Visual Studio toolbar, select Project → Manage NuGet Packages. The NuGet Package Manager appears.
  2. Select the gear icon that appears in the upper right-hand corner of the NuGet Package Manager. The Options window appears, showing a list of NuGet package sources.
  3. If the folder containing your NUPKG file does not appear in the Package sources: field, add that folder as a package source (by selecting the + button and then entering the path to your folder in the Source: field). Then, select OK.
  4. From the Package source: dropdown menu, select your new package source.
  5. When your NUPKG file appears in the NuGet Package Manager, click it and then select Install.

Because NUPKG files are compressed with zip compression, you can also extract the files contained within them using zip utilities such as:

  • Microsoft File Explorer (Windows)
  • 7-Zip (Windows)
  • Apple Archive Utility (Mac)
  • Corel WinZip (Windows and Mac)

After you extract the files contained within a NUPKG package, you can open and view them normally.

NOTE: If you have trouble extracting the files contained within a NUPKG file, you can try renaming the file to use the .ZIP extension before decompressing it.

Software's name License Platforms
7-Zip 7-Zip Open Source LinuxWindows
Apple Archive Utility Apple Archive Utility Bundled Mac
B1 Free Archiver B1 Free Archiver Open Source AndroidLinuxMacWindows
Corel WinZip Corel WinZip Commercial MacWindows
Corel WinZip Mac Corel WinZip Mac Commercial Mac
funzip funzip Free Linux
Microsoft File Explorer Microsoft File Explorer Included Windows
Microsoft Visual Studio Microsoft Visual Studio Commercial Windows
p7zip p7zip Free LinuxMac
RARLAB WinRAR RARLAB WinRAR Shareware Windows
Smith Micro Stuffit Deluxe Mac Smith Micro Stuffit Deluxe Mac Commercial Mac

Updated: September 29, 2020

2. NetUpdate Package

NetUpdate Package

A NUPKG file is an update package used by NetUpdate, a software utility used for updating Intego applications. It may contain a patch or content pack for software titles such as VirusBarrier, Personal Antispam, Personal Backup, FileGuard, and ContentBarrier.

Software's name License Platforms
Intego NetUpdate Intego NetUpdate Paid Mac

Updated: October 7, 2012

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