DF File Extension
Corel Paradox Table Filter
- File Type df
- Developer Corel Corporation
- Popularity
- Application Notepad++
- Category Settings Files
What is a DF file?
Corel Paradox Table Filter, identified by the DF extension, is a Settings Files type and includes 1190 files.
With the creation of the Corel Paradox Table Filter (DF), Corel introduced file format along with 27 programs built for their use.
DF files are supported by Windows, Linux and Mac OS. You can open a DF file using one of 4 programs, for example Notepad++, Atom and Sublime Text.
Programs that support DF files
How to open a DF file?
The most common reason why a DF 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 DF files are Notepad++, Atom 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 DF files.
Make Notepad++ the default DF viewer
Changing the default program in Windows
- Start by right-clicking on your DF 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 DF 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 DF 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.
Convert to and from DF
Please note that after converting a DF file, some functionality may differ from the original. However, in many cases, it can be converted back to its original format.
Converting Files to DF Format
Finding answers to DF file problems
If you encounter issues with DF files, don’t worry—most can be fixed with minor software adjustments. Refer to the troubleshooting tips below.
What are the signs that my DF file is damaged?
Corrupted DF settings 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 DF 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 DF file?
Use a recovery program to open the damaged DF file and navigate to the "Repair" menu item. Wait for the recovery process to finish, as it will automatically repair damaged settings files.
How to edit a DF file?
To edit DF files, you need to install specialized software that allows you not only to open but also to modify settings files. Online DF editors usually provide fewer features than software created specifically for Corel Paradox Table Filter.
List of Top DF editors 2026
Following these criteria, we have put together a list of recommended DF editors.
| DF Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| PSPad | Jan Fiala | Windows | 4.7 out of 5 (41 review) |
| 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) |
| Atom | - | Windows, Mac OS, Linux | 4.1 out of 5 (36 reviews) |