The File Extensions Database

.PRJ File Extension

  • Category: Data Files

What is an .PRJ file?

.PRJ is Project File

Generic project file extension used by multiple programs; typically saves project data and settings and may include references to other files used by the project.

The programs listed below are applications that save projects with ".prj" extensions and are not guaranteed to open all PRJ files. Therefore, the following list of programs should serve as a reference of possible file associations for PRJ files.

Programs that open Project File
Microsoft Visual Studio
IDM UltraEdit
ESRI ArcGIS for Desktop
Autodesk AutoCAD 2018
Steinberg WaveLab
Mackie Tracktion
PlanetSquires FireFly Visual Designer
Progress Stylus Studio
Multi Edit Software Multi-Edit
Freescale CodeWarrior
Mackie Tracktion
File Type 2 AIMMS Project File
Developer by: Paragon Decision Technology Category: Data Files

AIMMS (Advanced Integrated Multidimensional Modeling Software) project file; contains information for developing operations models; includes project settings and user-interface components such as menus and end-user pages.

An associated AIMMS model (.AMB) file is saved along with each project file.

How to solve problems with PRJ files

  • Associate the PRJ file extension with the correct application. On :
    Windows: Right click on any PRJ file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.PRJ files". Mac: Right click (or Ctrl-click) the PRJ file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .PRJ is Project File. Because only the current version supports the latest PRJ file format. Search, therefore, e.g. on the N/A manufacturer website after an available .PRJ is Project File update.
  • To make sure that your PRJ file is not corrupted or virus-infected, get the file again and scan it with antivirus software.