DPJ File Extension

DPJ file icon
Borland Delphi Project
  • Developer
    Embarcadero Technologies, Inc.
  • Popularity
    0 ( votes)

What is DPJ file?

DPJ is a file extension commonly associated with Borland Delphi Project files. Borland Delphi Project specification was created by Embarcadero Technologies, Inc.. DPJ file format is compatible with software that can be installed on Windows system platform. DPJ file belongs to the Developer Files category just like 992 other filename extensions listed in our database. The most popular software that supports DPJ files is Delphi. Software named Delphi was created by Embarcadero Technologies, Inc.. In order to find more detailed information on the software and DPJ files, check the developer’s official website.

Programs which support DPJ file extension

The following listing features DPJ-compatible programs. Files with DPJ extension, just like any other file formats, can be found on any operating system. The files in question may be transferred to other devices, be it mobile or stationary, yet not all systems may be capable of properly handling such files.

Programs that support DPJ file

Windows Windows

How to open file with DPJ extension?

Problems with accessing DPJ may be due to various reasons. Fortunately, most common problems with DPJ files can be solved without in-depth IT knowledge, and most importantly, in a matter of minutes. The list below will guide you through the process of addressing the encountered problem.

Step 1. Get the Delphi

The main and most frequent cause precluding users form opening DPJ files is that no program that can handle DPJ files is installed on user’s system. The solution is straightforward, just download and install Delphi. On the top of the page a list that contains all programs grouped based on operating systems supported can be found. One of the most risk-free method of downloading software is using links provided by official distributors. Visit Delphi website and download the installer.

Step 2. Check the version of Delphi and update if needed

If the problems with opening DPJ files still occur even after installing Delphi, it is possible that you have an outdated version of the software. Check the developer’s website whether a newer version of Delphi is available. It may also happen that software creators by updating their applications add compatibility with other, newer file formats. This can be one of the causes why DPJ files are not compatible with Delphi. The most recent version of Delphi is backward compatible and can handle file formats supported by older versions of the software.

Step 3. Associate Borland Delphi Project files with Delphi

If the issue has not been solved in the previous step, you should associate DPJ files with latest version of Delphi you have installed on your device. The process of associating file formats with default application may differ in details depending on platform, but the basic procedure is very similar.

Selecting the first-choice application in Windows

  • Right-click the DPJ file and choose Open with option
  • Click Choose another app and then select More apps option
  • Finally select Look for another app on this PC, point to the folder where Delphi is installed, check the Always use this app to open DPJ files box and conform your selection by clicking OK button

Selecting the first-choice application in Mac OS

  • Right-click the DPJ file and select Information
  • Proceed to the Open with section. If its closed, click the title to access available options
  • Select Delphi and click Change for all...
  • If you followed the previous steps a message should appear: This change will be applied to all files with DPJ extension. Next, click the Continue button to finalize the process.

Step 4. Verify that the DPJ is not faulty

You closely followed the steps listed in points 1-3, but the problem is still present? You should check whether the file is a proper DPJ file. Being unable to access the file can be related to various issues.

1. The DPJ may be infected with malware – make sure to scan it with an antivirus tool.

Should it happed that the DPJ is infected with a virus, this may be that cause that prevents you from accessing it. It is advised to scan the system for viruses and malware as soon as possible or use an online antivirus scanner. DPJ file is infected with malware? Follow the steps suggested by your antivirus software.

2. Verify that the DPJ file’s structure is intact

Did you receive the DPJ file in question from a different person? Ask him/her to send it one more time. The file might have been copied erroneously and the data lost integrity, which precludes from accessing the file. If the DPJ file has been downloaded from the internet only partially, try to redownload it.

3. Verify whether your account has administrative rights

There is a possibility that the file in question can only be accessed by users with sufficient system privileges. Log in using an administrative account and see If this solves the problem.

4. Verify that your device fulfills the requirements to be able to open Delphi

The operating systems may note enough free resources to run the application that support DPJ files. Close all running programs and try opening the DPJ file.

5. Check if you have the latest updates to the operating system and drivers

Latest versions of programs and drivers may help you solve problems with Borland Delphi Project files and ensure security of your device and operating system. It may be the case that the DPJ files work properly with updated software that addresses some system bugs.

Do you want to help?

If you have additional information about the DPJ file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on DPJ file.

Top File Extensions
Show more
File Extension of the day
3gp icon


3GPP Multimedia Format

3GP file is a multimedia file container developed by 3GPP (Third Generation Partnership Project). 3GP files can store audio and video data used by ...