Can I Convert NSF to PST Without Lotus Notes Installation?

Can I convert NSF files to PST files without Lotus Notes? The question has been asked – and answered – time and again, but to no avail. But there is no escaping the fact: NO, you cannot convert Lotus Notes NSF files to Outlook PST format without having Lotus Notes installed on your system.

Now that we know that NSF to PST conversion requires Lotus Notes installation, let’s look at the methods that can be used to perform NSF to PST conversion:

Method 1 – Manually Convert NSF to CSV format

You can manually convert NSF files to CSV format, by performing the following two steps:

Step 1: Export NSF Database to CSV Format
Follow these steps to convert your NSF database to a CSV format:

  • Open IBM Lotus Notes Program
  • Click the File menu, and then click Export
  • From the Export dialogue box, choose the location you want to save your file.
  • Select the ‘Comma Separated Value’ option as your file format, assign a name to your file and click Export.
  • From the CSV Export window, choose the desired options and click OK.

The exported data will be saved in CSV format at the specified location.

Step 2: Import CSV into Outlook

After exporting your NSF database, you will need to import the CSV file into Outlook. To do so, follow these steps:

  • Open your Microsoft Outlook application
  • Click the File tab from the main menu
  • Click Open & Export, and select the Import/Export option.
  • In the dialog box that appears, choose ‘Import from another program or file’, and then click Next
  • In the Import a File dialog box, choose ‘Comma Separated Values’ option and click Next.
  • Click Browse to select the exported CSV file. Under the Options bar, choose any one option and hit Next.
  • Click on Checkbox to set the additional settings, and then click Finish.

Your NSF data will now be converted into PST format.

Limitations of the Manual Solution

  • Time-consuming and exhausting: Conversion process can be tedious and time-consuming, as the manual method can convert only one NSF file at a time
  • Chances of error are high: Using the manual method to transfer huge IBM Notes data to Outlook, if not implemented correctly, involves risk of data loss. Also, you may experience issues like missing attachments, corrupt data, etc. 

Method 2 – Use Stellar Converter for NSF Software

Stellar Converter for NSF is a specialized NSF to PST converter software that allows to export all mailbox items — emails, attachments, contacts, calendar, and journals – to Outlook PST file format. It offers a simple and intuitive interface that lets you easily convert NSF mailbox items into Outlook PST file, without risk of loss of data.

The software can also help you overcome limitations of the above discussed method, and here’s how:

  • Allows to convert 4 NSF files at one go
  • Converts NSF file containing Lotus Notes mailbox items in their original intact form

Additional Benefits

  • Saves the converted NSF file in PST, MSG, RTF, EML, PDF and HTML file formats
  • Displays preview of all the converted mailbox items before saving them
  • Allows free NSF file to PST file Conversion for up to 10 items per folder
  • Allows to select and export selected mailbox items
  • Provides a three-step procedure to convert NSF files to Outlook PST file
Install & Run demo version of Stellar Converter for NSF software

free download

Step 1: Select (i.e. Browse or Find) the NSF file you want to convert
Step 2: Click Convert
Step 3: Preview the converted mailbox items of NSF file and save the file


In this post, we discussed that there are no methods that can help you convert NSF files to PST files, without Lotus Notes. However, there are ways that supports NSF to PST file conversion.
You can manually convert NSF files to PST files, by first exporting the NSF database into a CSV file format and then importing the CSV file into Outlook. However, mailbox migration task can be made incredibly easy and convenient by using Stellar Converter for NSF software. You can evaluate the features and functionality of the software, by downloading its free trial version.

  1. Mason Gonder February 18, 2020
    • Eric Simson March 12, 2020

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