Home : File Types : NSF File (2 File Associations)

.NSF File Extension

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File Type 1NES Sound Format File

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Rare Uncommon Average Common Very Common
CategoryAudio Files


File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.


Music file from an original Nintendo (NES/Famicom) game; allows music from Nintendo games to be played without loading the actual game; can be opened by a variety of NSF players.

Program(s) that open .NSF files
Microsoft Windows LogoWindows
Audio Overload
Nullsoft Winamp
Mac OS X LogoMac
Audio Overload
Linux LogoLinux
Audio Overload
XMMS with nsf-xmms plugin
Updated 5/4/2015

File Type 2Lotus Notes Database

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Rare Uncommon Average Common Very Common
CategoryDatabase Files


This file is saved in a binary format, which requires a specific program to read its contents.


Database file used by IBM Lotus business software; saved in the Notes Storage Facility (NSF) format, which stores data in document units called "notes;" used for storing collaborative business information such as mail and calendar data.

More Information

NSF files are often hosted by a Lotus Domino server, and they can be downloaded by Lotus Notes clients in order to work with a fully functional database in offline mode. If the client makes changes to the database, Domino includes the facilities to synchronize the changes back to the master database. NSF files can also be used for the process of data replication.

NOTE: NSF files may also serve as a Domino Web application that is hosted on a Web server, where the URL has a trailing ".nsf" string. These files include the Domino Web Service Design Element, which enables Web access.

Program(s) that open .NSF files
Microsoft Windows LogoWindows
IBM Lotus Notes
IBM Domino
Stellar Phoenix NSF to PST Converter
Stellar Phoenix Lotus Notes Recovery
Updated 5/4/2015