All about NDK Files

The NDK file type is primarily associated with Notes.

NDKFile Extension NDK
File extension: NDK
File type:  Database Design Elements

What is an NDK file?

NDK files mostly belong to Notes by IBM. This was a Lotus product. Lotus was bought out by IBM. Lotus Notes and Domino are a fundamental component of IBM Workplace. This file replaces .DSK files which were used by Notes for a long time. Windows XP and OS/2 adopted .DSK files for system backups and Notes had to change to avoid confusion.

How to open NDK files

You need a suitable software like Notes to open an NDK file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your NDK file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a NDK file directly in the browser:. Just drag the file onto this browser window and drop it.

Online NDK Text Viewer

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Programs that open and convert NDK files:

  1. Notes by IBM
    See the previous paragraphs to learn more about the main application.
  2. OS/2 (Saved Disk Format) by IBM
    The Mime types used with this association are: file/binary.

Technical Data for NDK File Extension

Related files:

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: NWDLicenseFile
EXEFile: %ProgramFiles%\MCU\MCU.exe


an ndk Database Design Element is a special file format by IBM and should only be edited and saved with the appropriate software.

How to solve problems with NDK files

  • Associate the NDK file extension with the correct application.
  • Update your software that should actually open database design elements. Because only the current version supports the latest NDK file format. Search, therefore, e.g. on the IBM manufacturer website after an available Notes update.
  • To make sure that your NDK file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
  • Click here to open your .NDK file online - secure, fast, and no downloads needed.
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