NSI File

What are NSI files and how to open them

Are you having problems opening a NSI file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your NSI files.

What is a NSI file?

NSI files have multiple uses, and Nullsoft Scriptable Install System (NSIS) Script is one of them. Read more about the other uses further down the page.

Nullsoft Scriptable Install System (NSIS) Script

We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

How to open NSI files

Important: Different programs may use files with the NSI file extension for different purposes, so unless you are sure which format your NSI file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested four different NSI openers which you will find listed below.

Last updated: February 24, 2023

All known file formats using extension .NSI

While Nullsoft Scriptable Install System (NSIS) Script is a popular type of NSI-file, we know of 2 different uses of the .NSI file extension. Different software may use files with the same extension for different types of data.

NorthStar Disk Image (NS DOS)

We know that one NSI format is NorthStar Disk Image (NS DOS). We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

NSI opener for Windows

We have identified one NSI opener that is compatible with this specific type of NSI file.

Various apps that use files with this extension

These apps are known to open certain types of NSI files. Remember, different programs may use NSI files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about NSI file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.