PRJ File Type

- The quick facts

What are PRJ files and how to open them

Are you having problems opening a PRJ file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a PRJ file?

PRJ files have multiple uses, and Project is one of them.

Project File

Files that contain the .prj file extension are most commonly used to store project files. The .prj file extension is a generic extension that is used by a variety of different project applications. PRJ files typically contain the project settings and other project data, including references to other files that the related project may use.

Some applications that use the .prj file extension for project files include Maestro, Microsoft Visual Basic, Visual Cafe, Turbo C, FireFly SDK, and AwpHelp.

Although many software applications use the .prj file extension, not all PRJ files are interchangeable across all applications. This means that a PRJ file that has been created in one application may not be able to be opened with another application that uses the .prj file extension due to differences in the format of the file type.

How to open PRJ files

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

While we have not verified the apps ourselves yet, our users have suggested 10 different PRJ openers which you will find listed below.

Last updated: June 29, 2022

All known file formats using extension .PRJ

While Project File is a popular type of PRJ-file, we know of 17 different uses of the .PRJ extension. Different software may use files with the same extension for different types of data.

UltraEdit Project

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

PRJ opener for Windows

We have identified one PRJ opener that is compatible with this specific type of PRJ file.

MATLAB Compiler Project

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

Programs that open these PRJ files

We have identified one PRJ opener that is compatible with this specific type of PRJ file.

More file formats using the PRJ extension

Through our research of PRJ files, we know that the following formats exist. However, we have not yet analyzed them in detail, and we would love to hear from you if you have information about either of them.

3D Studio Project

Anjuta Project

ASIC Project

Borland C/C++ Project

Clarion Project

Ergo!pro Project

FireFly SDK Designer Project

Harvard Total Project Manager Project

MADE Project

My House Project

Shapefile Projection Metadata

Total Project Manager Project

Virtual T IDE Project

Xenosaga Sound Info

Various apps that use files with this extension

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