NSIS 3.02.1 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The actual developer of the free software is NSIS Team.
This PC software can be installed on 32-bit versions of Windows XP/Vista/7/8/10/11. The program lies within Development Tools, more precisely Distribution.
We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. NSIS.exe is the frequent file name to indicate this program's installer. The following versions: 3.0 and 2.4 are the most frequently downloaded ones by the program users.
From the developer:
NSIS is an open source system that enables you to create Windows installers. Unlike other systems that can only generate installers based on a list of files and registry keys, NSIS has a powerful scripting language. This script language is designed for installers and has commands that help you to perform many installation tasks. You can easily add custom logic and handle different upgrades, version checks, etc.
You may want to check out more software, such as NSIS Studio, SFX Tool or CoolSoft NSISDialogDesigner, which might be similar to NSIS.