PDU File Extension
Protocol Data Unit Message
- File Type pdu
- Developer LG Electronics
- Popularity
- Application Notepad++
- Category Text Files
What is a PDU file?
Protocol Data Unit Message, identified by the PDU extension, is a Text Files type and includes 315 files.
With the creation of the Protocol Data Unit Message (PDU), LG Electronics introduced file format along with 3 programs built for their use.
PDU files are supported by Windows, Linux and Mac OS. You can open a PDU file using one of 7 programs, for example Notepad++, Gedit and Sublime Text.
Programs that support PDU files
How to open a PDU file?
The most common reason why a PDU 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 PDU files are Notepad++, Gedit and Sublime Text. To get the latest version of Notepad++, open the Notepad++ Team website where a universal installer for all operating systems is available.
Once setup is done, your operating system should assign Notepad++ as the default app for PDU files.
Make Notepad++ the default PDU viewer
Changing the default program in Windows
- Start by right-clicking on your PDU 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 Notepad++ as the application to associate with your PDU 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 PDU 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 Notepad++. Check the box next to "Always open in app" to make it the default program.
How to edit a PDU file?
To edit PDU files, you need to install specialized software that allows you not only to open but also to modify text files. Online PDU editors usually provide fewer features than software created specifically for Protocol Data Unit Message.
List of Top PDU editors 2026
Following these criteria, we have put together a list of recommended PDU editors.
| PDU Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| TextEdit | Apple | Mac OS | 4.8 out of 5 (40 reviews) |
| PSPad | Jan Fiala | Windows | 4.7 out of 5 (41 review) |
| Gedit | GNOME | Linux | 4.6 out of 5 (38 reviews) |
| Notepad++ | Notepad++ Team | Windows | 4.6 out of 5 (37 reviews) |
| Sublime Text | Sublime HQ Pty | Windows, Mac OS, Linux | 4.6 out of 5 (39 reviews) |
| Windows Notepad | Microsoft | Windows | 4.2 out of 5 (37 reviews) |
| Atom | - | Windows, Mac OS, Linux | 4.1 out of 5 (36 reviews) |
Finding answers to PDU file problems
If you encounter issues with PDU files, don’t worry—most can be fixed with minor software adjustments. Refer to the troubleshooting tips below.
What are the signs that my PDU file is damaged?
Corrupted PDU text files may have one or more of the following symptoms:
- Poor performance when editing a file in Notepad++;
- Opening or processing the file in Notepad++ 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 PDU file;
- Working with the file triggers the display of error messages;
Why does Notepad++ quit or crash unexpectedly?
Notepad++ crashes can be attributed to outdated software. Make sure you have installed the latest updates for Notepad++ Team 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 PDU file?
Use a recovery program to open the damaged PDU file and navigate to the "Repair" menu item. Wait for the recovery process to finish, as it will automatically repair damaged text files.