Basic information about NPDF file

When there is a problem with opening files with the file extension NPDF（*.NPDF or *.npdf）, you do not need a computer expert. In most cases, using the helpful suggestions of experts contained in our website as well as appropriate programs, you can solve the problem with the NPDF file yourself.

There are 1 file types using the NPDF file extension in our database. In the further part of this page, you will find detail information about all the NPDF file with their brief description and a list of programs that support NPDF file sorted by operating systems. The table below provides useful information about the NPDF file extension. It answers questions such as:
  • What is the NPDF file?
  • How to open a NPDF file?
  • What programs do I need to open a NPDF file?
  • What programs help to create and edit a NPDF file?
  • How to convert NPDF files to another file format?
  • How to convert another files to NPDF file format?


1.Detail information about NPDF file extension: Normal PDF Document

File type Normal PDF Document Category Page Layout Files
Developer N/A File format N/A
Description NPDF file is a Normal PDF Document. Some earlier programs used the npdf file extension to label "normal" PDF files to distinguish them from other variants of this popular format.

Eventually this practice was abandoned and all variants of PDF have commonly PDF extension.
Software programs that will open, edit or convert NPDF files

Windows		 Adobe Acrobat Reader

macOS		 Adobe Acrobat for Mac



Can't open a NPDF file?

When you click a file to open it, operating system examines the filename extension. If operating system recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When operating system does not recognize a filename extension, you receive the following message:

”Can't open this file: example.NPDF”。

To open this file, you install one of the applications from the list of software programs that you found here, you should be able to open, edit or convert the file with the NPDF extension without any issue.


Where I can download the application that support NPDF file?

If you do not know where you can download the application from our list, click on the link (which is the name of the program), you will find more information there on the location where to download the required application. Most often they are the websites of software manufacturers.


How to change file associations?

  • Right-click a file with the extension whose association you want to change, and then click "Open With".
  • In the "Open With" dialog box, click the program whith which you want the file to open, or click "Browse" to locate the program that you want.
  • Select the ”Always use the selected program to open this kind of file” check box.


Can I change the extension of NPDF files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read/open the file. The problem is, changing the file extension does not change the file format. Select a software program from our list and install it on your computer. If the file has not opened correctly, you have to look for a different software program from our list. Sometimes you have to repeat the operation several times.


What else may cause problems width open a NPDF file?

The reasons for the lack of the ability to open a NPDF file on your computer may be at least several. The easiest thing is to find a suitable application installed on your computer, which will open a NPDF file. If there is still something wrong, you might want to check:

  • Whether the NPDF file is damaged.
  • Whether the NPDF file is incorrectly linked in the registry entries.
  • Whether the NPDF file extension has been accidentally removed from the Windows registry.
  • Whether the installation of an application that supports the NPDF file format is incompletely.
  • Whether the NPDF file is infected.
  • Whether the drivers of the equipment used for opening a NPDF file are up to date.
  • Whether your computer has enough hardware resources to open a NPDF file.

If the NPDF file still not working with your software after eliminating the above shortcomings? That means that the problem is more complex and requires the help of a specialist.