Files with cnf extension are commonly used for various network configuration files. These are text files editable in any text editor.

There are 4 other file types using
the CNF file extension!

cnf icon.cnf - Lotus 1-2-3 configuration data

empty icon.cnf - MySQL startup configuration

empty icon.cnf - KiSS paper doll set

empty icon.cnf - Origin configuration

CNF file extension - Network configuration data

What is cnf file? How to open cnf files?

File extension cnf is often used for configuration files for various network applications like Windows Telnet, Mac Terminal to store network configuration including user name, password, server names etc.

For example Microsoft Windows uses .cnf files for storing configuration data for for speed dial of dial-up connection through modem to Internet.

Most cnf files are saved in simple text format and their content is viewable in text editor (Windows Notepad, Notepad++, TextEdit, gedit).

Updated: December 7, 2023

The default software associated to open cnf file:

Microsoft Windows icon

Microsoft Corporation logoMicrosoft Windows  Microsoft Windows software

Company or developer:
Microsoft Corporation

A family of operating systems developed by the Microsoft Corp. The first Windows was released in 1985 as a GUI add-on to MS-DOS. MS-DOS based Windows versions were developed to 2000, when was released the last version called Windows ME. Windows based on NT core started in 1993. Windows NT family are developed to these days, the latest version is called Microsoft Windows 11.

macOS icon

Apple, Inc. logomacOS  Apple macOS / Mac OS X software

Company or developer:
Apple, Inc.

macOS is Unix-based desktop operating system, a successor of Mac OS X system for MacBook-family, iMac, Mac Mini and Mac Pro computers, developed and sold by Apple, Inc.

Mac OS X icon

Apple, Inc. logoMac OS X  Apple macOS / Mac OS X software

Company or developer:
Apple, Inc.

OS X or Mac OS X is Unix-based operating system developed by Apple Inc. for Macintosh computers. It contains basic core applications for everyday use, such as Finder basic file manager, Safari for Internet browsing, QuickTime for video, iTunes for managing audio data and iPod, iOS devices management , iMessage instant messaging, Mail, Contacts, Calendar and many more.

The latest version 10.11 of OS X is called El Capitan. It is available to purchase on Mac App Store as well as is distributed with new Mac computers and notebooks. It includes features to improve the security, performance, design and usability.

OS X operating system was replaced by new macOS in 2016!

Help how to open:

Network configuration files are stored in simple text format and it is viewable in any text editor.

How to convert:

Configuration files are not meant to be converted to anything else.

List of software applications associated to the .cnf file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open cnf file, edit cnf file, convert cnf file, view cnf file, play cnf file etc. (if exist software for corresponding action in's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting cnf files.

Software that open cnf file - Network configuration data

Programs supporting the exension cnf on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for open cnf file action.

Apple macOS / Mac OS X:

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