CPROJECT File

What are CPROJECT files and how to open them

Are you having problems opening a CPROJECT 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 CPROJECT files.

What is a CPROJECT file?

A .CPROJECT file is an Eclipse CDT Project Settings file.

Eclipse CDT Project Settings files store the configuration for C/C++ projects in Eclipse's CDT (C/C++ Development Tooling). They define how source files are compiled, linked, built, and indexed across different build configurations (for example, debug vs. release). These files are written by Eclipse CDT when setting or changing project properties like compiler flags, include directories, macros, toolchain settings or tool-specific options. They are read by CDT every time the project is opened or rebuilt.

Such a file is produced by creating or modifying a CDT C/C++ project through the Eclipse IDE's project or build settings dialogs. Typical workflows include managed build projects, makefile-based projects, or projects using build systems like Autotools; in all cases most IDE-side settings live here. After editing, Eclipse parses this file to determine which tools to invoke for compiling, linking and version control of different source types.

The internal format of the file is XML. It begins with an XML declaration (version 1.0, UTF-8 encoding, standalone status) followed by a root element named "cproject" with a storage_type_id such as "org.eclipse.cdt.core.XmlProjectDescriptionStorage". Inside are storageModule elements with moduleId values such as "org.eclipse.cdt.core.settings" or "cdtBuildSystem"; configurations identified by cconfiguration elements contain build tool definitions, individual toolchains (compiler, linker, assembler, etc.), fileInfo entries per source file, and various options.

How to open CPROJECT files

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

While we have not verified the apps ourselves yet, our users have suggested three different CPROJECT openers which you will find listed below.

Last updated: September 18, 2026

Various apps that use files with this extension

These apps are known to open certain types of CPROJECT files. Remember, different programs may use CPROJECT files for different purposes, so you may need to try out a few of them to be able to open your specific file.

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