.NSF File Extension

2 file types use the .nsf file extension.
File Type 1

NES Sound Format File

Developer N/A
4.1  |  31 Votes
Category Audio Files
Format N/A

What is an NSF file?

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.

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Programs that open NSF files

Updated June 18, 2020
File Type 2

Lotus Notes Database

Developer IBM
3.5  |  20 Votes
Category Database Files
Format Binary

What is an NSF file?

An NSF file is a database file used by IBM Lotus business software. It is saved in the Notes Storage Facility (NSF) format, which stores data in document units called "notes." NSF files are 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 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.

Programs that open NSF files

Updated November 30, 2021

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