DPROJ File Extension
Delphi Project
- File Type dproj
- Developer Embarcadero Technologies
- Popularity
- Application Delphi
- Category Developer Files
- Format XML
What is a DPROJ file?
Delphi Project, identified by the DPROJ extension, is a Developer Files type and includes 1166 files.
With the creation of the Delphi Project (DPROJ), Embarcadero introduced file format along with 8 programs built for their use.
DPROJ files are supported by Windows. You can open a DPROJ file using one of 2 programs, for example Delphi and RAD Studio.
How to open a DPROJ file?
The most common reason why a DPROJ file cannot be opened is the absence of required software. To fix this, select a compatible program from the list. Then visit the official developer website via the provided link, download the program, and install it on your system.
The most popular programs for working with DPROJ files are Delphi and RAD Studio. To get the latest version of Delphi, open the Embarcadero website where a universal installer for all operating systems is available.
Once setup is done, your operating system should assign Delphi as the default app for DPROJ files.
Make Delphi the default DPROJ viewer
Changing the default program in Windows
- Start by right-clicking on your DPROJ file and selecting the "Open With" option. From there, click "Choose another app" to continue;
- Inside the popup window, scroll through the list of applications and specifically choose Delphi as the application to associate with your DPROJ file;
- Check the "Always use this app" checkbox and click "OK".
Change the default app to open files on Mac
- Right click or use Control + Left Click on the desired DPROJ file to access a dropdown menu of actions;
- Select "Open in application" and click "Other";
- Scroll down to the bottom of the window, where you will find the "Enable" menu. Default, "Recommended Programs" will be selected;
- In this menu, choose "All Programs" and navigate to Delphi. Check the box next to "Always open in app" to make it the default program.
How to edit a DPROJ file?
To edit DPROJ files, you need to install specialized software that allows you not only to open but also to modify developer files. Online DPROJ editors usually provide fewer features than software created specifically for Delphi Project.
List of Top DPROJ editors 2026
Following these criteria, we have put together a list of recommended DPROJ editors.
| DPROJ Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| RAD Studio | Embarcadero | Windows | 4.8 out of 5 (42 reviews) |
| Delphi | Embarcadero | Windows | 4.4 out of 5 (34 reviews) |
Finding answers to DPROJ file problems
If you encounter issues with DPROJ files, don’t worry—most can be fixed with minor software adjustments. Refer to the troubleshooting tips below.
What are the signs that my DPROJ file is damaged?
Corrupted DPROJ developer files may have one or more of the following symptoms:
- Poor performance when editing a file in Delphi;
- Opening or processing the file in Delphi or other programs causes instability or crashes in the program;
- The file shows errors when trying to open it or does not open completely;
- Unexpected expansion of the total size of the DPROJ file;
- Working with the file triggers the display of error messages;
Why does Delphi quit or crash unexpectedly?
Delphi crashes can be attributed to outdated software. Make sure you have installed the latest updates for Embarcadero products.
A computer restart is often the key to solving numerous common problems. That’s why, it is recommended to restart the computer before making any changes to the software settings.
What methods can be used to repair a damaged DPROJ file?
Use a recovery program to open the damaged DPROJ file and navigate to the "Repair" menu item. Wait for the recovery process to finish, as it will automatically repair damaged developer files.