What is NSF File Extension?


NSF stands for Notes Storage Format. The file extension of NSF is .nsf which is easy to recognize. The file extension is supported by IBM Domino Server as well as IBM Lotus Notes. It is capable to hold crucial databases of IBM Lotus Notes including emails, contacts, design information, user data and appointment. The file extension is flexible to download by the Notes Clients to use it offline. In case, users have made any modification in the file, the changes information is automatically synchronized by Domino Server.


They are Database files.

Supportive Apps

  • IBM Domino
  • IBM Notes

MIME Types

  • application/x-lotus-notes
  • application/vnd.lotus-notes


The NSF files can be encrypted in many different ways.

  • Field Encryption
  • Port Encryption
  • Document Encryption
  • Database Encryption
  • Mail Encryption


The location is based on the Windows operating system you are using and it is either single user or multiple. It saves in different locations on Mac and Linux. 

Single User

Windows: - C:\Programs Files\IBM\Lotus\Notes\Data

Multi User

Mac OS: - ~/Library/Application Support/Lotus Notes Data

Linux: - / {$HOME}/Lotus/Notes/Data

Windows XP: - \Documents and Settings\Username\Local Settings\Application Data\Lotus\Notes\Data

Windows Vista: - \Users\AppData\Local\Lotus\Notes\Data

Windows 7: - \Users\Username\AppData\Local\Lotus\Notes\Data

Windows 8: - \Users\Username\AppData\Local\Lotus\Notes\Data

How to access NSF File Extension

An NSF file is accessed by Lotus Notes app. Users can follow two methods to open Lotus Notes data.

They can open Notes Storage Facility using Lotus Notes or can take help from a third app to access NSF.

Associated conversion from NSF

Associated conversion to NSF