CNX file format description

Many people share .cnx files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .cnx file can be edited, converted or printed with. On this page, we try to provide assistance for handling .cnx files.

3 filename extension(s) found in our database.

.cnx - IBM Rational XDE Component Instance File

The CNX data files are related to IBM Rational XDE. The CNX file is an IBM Rational XDE Component Instance File. Rational XDE is a graphical component modeling and development tool that uses the industry-standard Unified Modeling Language (UML).

IBM Rational XDE
Data files
- / -
IBM Rational XDE Component Instance File related extensions:
iManage Data
UniChem Chemical Modeller XYZ Data
PCLTool Transformation Parameter Table
Windows Test Technologies Data
ABBYY Lingvo Custom Dictionary Text
IBM Content Navigator Failed Task Log

.cnx - Trimble LM80 Data

The CNX data files are related to Trimble LM80. The CNX file is a Trimble LM80 Data. Trimble LM80 is a pocket-sized personal computer featuring the first data collection software created specifically for construction layout.

Trimble LM80
Data files
- / -
Trimble LM80 Data related extensions:
UltraDefrag Lua Report
CATIA Model Data
EdgeCAM Educational Part Data
Addict Dictionary
Firebird SQL Delta Data
ThumbsPlus Print Scheme

.cnx - Pegasus Mail v3 Message Data

The CNX data files are related to Pegasus Mail. The CNX file is a Pegasus Mail v3 Message Data. Pegasus Mail is a previously freeware, proprietary, email client that is developed and maintained by David Harris.

Pegasus Mail
Data files
- / -
Pegasus Mail v3 Message Data related extensions:
ICQ Compressed Sound Scheme Data
Scientific WorkPlace Wrap Data
Animation Master Volumetric Effect Plug-in Data
Insight Segmentation and Registration Toolkit TXX Data
Surpac Vision Data Repository
Pegasus Mail SMTP Session Log

Naturally, other applications may also use the .cnx file extension. Even harmful programs can create .cnx files. Be especially cautious with .cnx files coming from an unknown source!

Can't open a .cnx file?

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

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .cnx file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

cbx, cgx, chx, cmx, cn, cna, cnc, cnd, cns, cx, cxn, dnx, fnx, ncx, nx

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

QuickCAM Pro CNC Machine Tool Path
ControlDraw Diagram
IBM Rational XDE Collaboration File
IBM Rational Software Architect DNX Diagram
Autodesk Land Desktop Label Style
Catena Project

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

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If you have useful information about the .cnx file format, then write to us! >> CNX file