DPL file: How can I open a .DPL file?
The table below provides useful information about the .dpl file extension. It answers questions such as:
- What is the .dpl file?
- What program do I need to open a .dpl file?
- How can the .dpl file be opened, edited or printed?
- How can I convert .dpl files to another format?
We hope you find this page helpful and a valuable resource.
✅ Delphi Package Library

The DPL file is a Delphi Package Library. DPL file is a Windows DLL with Delphi-specific features integrated into it.
✅ Digital Photo Librarian database

The DPL file is a Digital Photo Librarian Database. Digital Photo Librarian is digital photo database tool for Microsoft Windows.
✅ WinDev Duplicate Data

The DPL file is a WinDev Duplicate Data. WinDev is an integrated development environment (IDE) fourth generation language (4GL), first published by PC SOFT in 1993, which is based upon a run-time engine (framework). It uses a 4GL known as WLanguage.
⚠ Be careful with .dpl files.
It's important to know that the .dpl file extension can be used by various programs, not just the ones you expect. This includes potentially harmful software or malware that might create .dpl files. Be cautious when dealing with .dpl files from unknown sources.
🚫 The .dpl file extension is often given incorrectly!
According to the searches on our site, these misspellings were the most common in the past year:
Is it possible that the filename extension is misspelled?
We found the following similar file extensions in our database:
🔴 Can't open a .dpl file?
When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:
Select an app to open this .dpl file
It means that the operating system does not have a default app associated with the .dpl file type. To resolve this issue and open the file, you can take the following steps:
- Right-click on the .dpl file. A context menu will appear.
- From the context menu, select Open with. Windows will display a list of recommended apps.
- If the desired app is listed, select it from the provided options.
- If you cannot find the appropriate app, you may need to install software that supports the specific file type.
If you don't know how to change the default app for the .dpl file, check the FAQ.
🔴 Can I change the extension of files?
Changing the filename extension of a file is not a good idea. The extension of a file serves as a hint to the operating system and various software programs about the type of data contained within the file. When you alter a file's extension, you essentially modify how software applications interpret and handle that file. Every file has a specific format, also known as its file type or file format. The problem is, changing the file extension does not change the file format.
If you have helpful information about the .dpl file extension, write to us.