File Extension CG4

  • Full name
    CALS Group IV Bitmap Graphics
  • Developer
Have you encountered a problem with a CG4 file? Don’t you know which program opens a file with this extension? You will find all the information you need about working with a CG4 file here. In the further part of this page we have added a list of programs that should open your CG4 file. It is enough you choose a proper application for your operating system, download and install it.

What is CG4 file?

The ending CG4 marks a raster image in CALS Group 4 format. This is a monochrome image format developed as a standard graphic data exchange format by the US Department of Defense. The data is uncompressed.

More info

These files also use the file extension gp4.

Programs which can open a CG4 file

How to open file with CG4 extension?

In order to open a file with CG4 extension one of the following programs must be installed on user’s system. If a problem with opening CG4 file occurred, it is highly possible that none of the listed programs is present on user’s system. Even if one or more said programs are installed, there may be issues related with given programs. In order to solve a problem with CG4 files, follow the instructions below.
Install CorelDraw Graphics Suite or other program from the list

Most often resolving problems with opening CG4 files is very simple. Just install an appropriate program that supports such files. All of the listed programs support CG4 files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of CG4 files or offer file conversion options, but may not be capable of editing such files.

Set CorelDraw Graphics Suite as the default program for opening CG4 files

It is possible that although a compatible program has been installed on user’s system, it is not used by the system to open it. This may happen because no default application was associated with this type of files. To associate CG4 files with given application, select "Open with" from drop-down menu (accessed by right-clicking on the file). Then select from the list the program or application you want to be used to open this type of file. If the CorelDraw Graphics Suite applications is not on the list, select "Browse" option in order to manually locate the directory where CorelDraw Graphics Suite has been installed.


Check the section that lists most common problems with CG4 files

Sometimes problems with opening CG4 files may not lie with the application itself, but can arise due to other causes, such as:

  • File data is corrupted
  • CG4 files has been not been completely download from the internet (only a part of the data has been downloaded)
  • Currently used user account hasn’t been granted necessary privileges to open CG4 files (should that be the case, please contact your system administrator or IT specialist)
  • CG4 file was being copied from a corrupted storage device and is incomplete or data is corrupted. (Copying files from unknown or untrusted sources should be conducted with great care as such files may contain malicious software, which can damage your system)

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