The File Extensions Database

.NSI File Extension

  • Developer by: Nullsoft
  • Category: Developer Files
  • Format: Text

What is an .NSI file?

.NSI is NSIS Script

Text file written using NSIS (Nullsoft Scriptable Install System) script, a language used for declaring the logic and tasks for software installers; often references files and folders to install as well as Windows registry actions.

Programs that open NSIS Script
File Viewer Plus
Nullsoft NSIS
Eclipse with EclipseNSIS plug-in
spaceblue Venis IX

How to solve problems with NSI files

  • Associate the NSI file extension with the correct application. On :
    Windows: Right click on any NSI file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.NSI files". Mac: Right click (or Ctrl-click) the NSI file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .NSI is NSIS Script. Because only the current version supports the latest NSI file format. Search, therefore, e.g. on the Nullsoft manufacturer website after an available .NSI is NSIS Script update.
  • To make sure that your NSI file is not corrupted or virus-infected, get the file again and scan it with antivirus software.