PROJ File

What are PROJ files and how to open them

Are you having problems opening a PROJ 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 PROJ files.

What is a PROJ file?

PROJ files have multiple uses, and BeOS CodeWarrior Project is one of them. Read more about the other uses further down the page.

BeOS CodeWarrior Project

We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

How to open PROJ files

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

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

Last updated: July 30, 2023

All known file formats using extension .PROJ

While BeOS CodeWarrior Project is a popular type of PROJ-file, we know of 5 different uses of the .PROJ file extension. Different software may use files with the same extension for different types of data.

L3DT Project

We know that one PROJ format is L3DT Project. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

MSBuild Project

We know that one PROJ format is MSBuild Project. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

Poseidon For UML Project Information

We know that one PROJ format is Poseidon For UML Project Information. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

World Construction Set Project

We know that one PROJ format is World Construction Set Project. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

Various apps that use files with this extension

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

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about PROJ file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.