Norton Internet Security settings file
File type: Settings, options, themes or skins file
A .npfx file is a settings file used by Norton Internet Security on Microsoft Windows.
It stores configuration data for the Norton Internet Security firewall and is used by the software rather than as a standalone document.
File type category:
Settings, options, themes or skins file
Date updated: September 28, 2026
NPFX files belong to Norton Internet Security, a security suite from Symantec that protects Windows computers against viruses, worms, Trojans and other malicious software.
The file contains settings for the suite's Internet firewall. Norton Internet Security reads the file as part of its configuration and uses those settings when applying firewall protection.
The format is associated with legacy Windows versions of Norton Internet Security and is not intended as a general-purpose settings interchange format.
Open a .npfx file through Norton Internet Security on Microsoft Windows. The file is normally used automatically by the software rather than opened directly.
To view or change the settings, use Norton Internet Security's firewall or configuration controls. Do not edit the file in a text editor, because it is application data and may not contain readable text.
A .npfx file cannot be meaningfully converted with a general-purpose file converter. Its contents are Norton Internet Security configuration data, not a document or media format.
When moving to another installation or security product, recreate the firewall settings using the relevant software's configuration controls.
Software apps that import npfx files:
Microsoft Windows
Software apps that export npfx files:
Microsoft Windows
Software apps that manage or store settings in npfx files:
Microsoft Windows
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