Basic information about DEC file

When there is a problem with opening files with the file extension DEC（*.DEC or *.dec）, 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 DEC file yourself.

There are 5 file types using the DEC file extension in our database. In the further part of this page, you will find detail information about all the DEC file with their brief description and a list of programs that support DEC file sorted by operating systems. The table below provides useful information about the DEC file extension. It answers questions such as:
  • What is the DEC file?
  • How to open a DEC file?
  • What programs do I need to open a DEC file?
  • What programs help to create and edit a DEC file?
  • How to convert DEC files to another file format?
  • How to convert another files to DEC file format?


1.Detail information about DEC file extension: Declaration File

File type Declaration File Category Developer Files
Developer N/A File format N/A
Description DEC file is a Declaration File. A DEC file is a text-based declaration file used by ADL (Application Development Language) programs. It contains global variables and constants that may be referenced by other files within a programming project.
Software programs that will open, edit or convert DEC files

Windows		 ADL software
Edit with a text editor

macOS		 ADL software
Edit with a text editor


2.Detail information about DEC file extension: ArcView UNIX Hyperhelp Supporting File

File type ArcView UNIX Hyperhelp Supporting File Category Misc Files
Developer N/A File format N/A
Description DEC file is a ArcView UNIX Hyperhelp Supporting File.
Software programs that will open, edit or convert DEC files

Windows		 ArcGIS for Desktop Basic (ArcView)


3.Detail information about DEC file extension: DEC DX WPS Plus Document

File type DEC DX WPS Plus Document Category Misc Files
Developer N/A File format N/A
Description DEC file is a DEC DX WPS Plus Document.
Software programs that will open, edit or convert DEC files


4.Detail information about DEC file extension: Dolphin EasyConverter Project

File type Dolphin EasyConverter Project Category Misc Files
Developer N/A File format N/A
Description DEC file is a Dolphin EasyConverter Project.
Software programs that will open, edit or convert DEC files

Windows		 EasyConverter


5.Detail information about DEC file extension: Magic: The Gathering Deck Of Cards

File type Magic: The Gathering Deck Of Cards Category Game Files
Developer N/A File format N/A
Description DEC file is a Magic: The Gathering Deck Of Cards.
Software programs that will open, edit or convert DEC files

Windows		 Magic: The Gathering Online



How to convert DEC files to another file format?

There are 1 records in our database eligible for DEC files to another file format conversion. If you want to achieve DEC to another files conversion, you may use the option.

DEC to PDF


Can't open a DEC 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.DEC”。

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 DEC extension without any issue.


Where I can download the application that support DEC 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 DEC 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 DEC file?

The reasons for the lack of the ability to open a DEC 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 DEC file. If there is still something wrong, you might want to check:

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

If the DEC 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.