CV4 File

What are CV4 files and how to open them

Are you having problems opening a CV4 file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your CV4 files.

What is a CV4 file?

A .CV4 file is a CodeView Colors file.

CodeView Colors files record customized color settings for Microsoft's CodeView debugger, version 4.x. These files let users define how different parts of the debugging interface (menus, code windows, registers, variables, etc.) appear in terms of foreground and background colors. They spare the user from reapplying those choices every time the program starts.

The color settings are edited via CodeView's "Colors" dialog and saved when the user accepts the changes. On DOS, that causes the settings to be stored in a filename CLRFILE.CV4; under Windows, CodeView writes CLRFILE.CVW. The file is read when CodeView starts so the custom color scheme appears automatically each session.

Internally, CodeView Colors files begin with an ASCII marker. They contain the literal string "CodeView4." and elsewhere include "--colorfile" (and "--COLORFILE"). These identifiers help CodeView recognize and validate the color settings file.

How to open CV4 files

Important: Different programs may use files with the CV4 file extension for different purposes, so unless you are sure which format your CV4 file is, you may need to try a few different programs.

We have not yet verified any programs for Windows that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

Last updated: September 19, 2026

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