CMLOCK file format description

Many people often share .cmlock files without providing instructions on how to use them. This can make it difficult for users to determine which program is compatible for editing, converting, or printing .cmlock files. To address this issue, we have created this page to offer assistance and guidance on handling .cmlock files. We provide information on compatible software, editing instructions and conversion options to help users effectively interact with .cmlock files.

Our aim is to simplify the process and promote seamless use of the .cmlock file format.

1 filename extension(s) found in our database.

.cmlock - CET Designer Lock Data

The CMLOCK data files are related to CET Designer. The CMLOCK file is a CET Designer Lock Data. CET Designer is a complete design, specification and visualization tool, allowing you to complete every step of the proposal process in one program.

CET Designer
Data files
- / -
CET Designer Lock Data related extensions:
Adobe Acrobat Language Resource
Cindex Data
Wink Template
GodMode9 Script
ENVI N-D Visualizer State Data
LabCognition Panorama Library

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

Can't open a .cmlock 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.

Operating systems

At, we strive to provide a seamless user experience by ensuring compatibility with a wide range of operating systems. The following is a comprehensive list of the operating systems currently supported by

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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