>> CNX file

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. 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:
RequisitePro Database Information File
IBM DB2 Binary Large Object Data
IBM Forms Logger File
SPSS Raw Response Data
SPSS Overflow Data
HydroCAD Prefab Chamber

.cnx - Trimble LM80 Data

The CNX data files are related to Trimble LM80. 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:
Autodesk Inventor Compressed Content Library
STELLA Runtime
Autodesk Inventor Content Library
IBM i Access Data Transfer to IBM i
Tekla Structures Exported Shape
Wonderware QI Analyst Data

.cnx - Pegasus Mail v3 Message Data

The CNX data files are related to Pegasus Mail. 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
Dynamics Solver Problem Definition
SmartWare II Data
Logos Library System Data
ICRA Site Label Data
Scientific WorkPlace Wrap Data

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:

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

Operating systems currently supports the following operating systems:

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

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