What is and How to Open a CFG File in Windows, MAC and online

The Configuration files definition and 7 other types and linked programs information.


What is a CFG File

A CFG file is tipically a configuration data file in windows and MAC. It is a standard format. The best program to open this file type is a text editor like notepad.

How to open CFG Files in Windows and MAC

The File extension cfg is used by the following type(s):

Default file extension:Configuration files

CFG file suffix is related to configuration files used historically in many programs and games since the times of MS-DOS.

Programs that open cfg files:

  • gedit (Linux)
  • NotePad
  • NotePad++ text editor
  • Nvu
  • TextEdit(Apple OS X)


DataFlex configuration files

This format defines how DataFlex will behave on that installation. These files typically seen are: filelist.cfg, termlist.cfg, collate.cfg and dfini.cfg.

Programs that open cfg files:

  • DataFlex (Linux)


Delphi project configuration 

This configuration file used by Delphi.


  • Delphi (Windows)


Norton Ghost configuration

It is used by Norton Ghost. ConfigurationPrograms:

Norton Ghost (Windows)


Pro/ENGINEER configuration

The file contains various configurations settings. There are stored configuration parameters of applications or projects, documents etc. Parameters, syntax of records and their interpretation depends on concrete application.


  • Pro/Engineer (multiplatform software)



The file contains the information about the supercell of atoms RMCProfile will use to fit the data.


  • RMCProfile (multiplatform software)


ZEMAX configuration 

It contains saved analysis settings and is used by ZEMAX.


  • ZEMAX (Windows)