What is a .NSF File And How To Open It – IBM (Visual Guide)

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Have you downloaded a file with .nsf extension, but you have never seen this extension before? It is important to know how to open this file – in order to be able to work with it. Fear not, in this article we will show you how to easily open the .nsf file in few simple steps on various systems.

What is a .NSF file?

The file extension .NSF stands for Lotus Notes Database. The creator of this file extension is IBM. This database related file is in binary format.

What to know

There are currently 3 software that can open the .nsf file on 1 platform.

How to open a .NSF file?

Below we will show you a step-by-step guide on how to open the .NSF file on various operating systems.

How to open a .NSF file on Windows (7, 8, 10)

There are 4 simple steps to open the .nsf file on Windows.

1. The first step is to download the CubexSoft NSF Converter software. You will be using this software in order to open the file. Other software that can be used in opening this file is: Stellar Converter for NSF, Aryson NSF to PST Converter and CubexSoft NSF Converter.

Step 2

Step 2: Locating your .NSF file

2. In the second step you need to locate the downloaded file. The file can be usually found in your /download/ folder if you don’t remember where you have downloaded it to.

Step 3

Step 3: Choose “Open with”

3. In the third step right click on your file and choose “Open with”.

Step 4

Step 4: Choose the software and click ok

4. After choosing the “Open with” option, you will have an option to choose the CubexSoft NSF Converter software you have downloaded. Choose your software and click on “OK”. That’s all, now you have opened your file on Windows.

Still cannot open the .NSF file?

If you are still unable to open the .NSF file, it might be because you are trying to open the wrong one. The .NSF file extension is similar to other file extensions such as: .nsf – NES Sound Format File. You might be trying to open the wrong file, please recheck if you are trying to open the right file extension again.


In this article you have learned how to open the .NSF file with the CubexSoft NSF Converter, Stellar Converter for NSF, Aryson NSF to PST Converter programs on Windows.