CNF File Extension
MySQL Configuration Format
- File Type cnf
- Developer MySQL
- Popularity
- Application Sublime Text
- Category Configuration Files, Settings Files
- Format Text
What is a CNF file?
MySQL Configuration Format works with the CNF file extension and is classified under Configuration Files and Settings Files, with a total of 1390 files.
With the creation of the MySQL Configuration Format (CNF), SQLite introduced file format along with programs built for their use.
CNF files are compatible with various operating systems, including Linux, Windows and Mac OS. You can open a CNF file using one of 7 programs, for example Atom, Sublime Text and PSPad.
Programs that support CNF files
How to open a CNF file?
The most common reason why a CNF 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.
Atom, Sublime Text and PSPad are among the most widely used programs for handling CNF files. If you wish to install the latest release of Sublime Text, visit the official Sublime HQ Pty portal and download the edition that works on any operating system.
Following installation, CNF files should be automatically opened with Sublime Text.
Set Sublime Text as the default CNF application
Change the default app that opens a file on Mac
- Right-click or use Control + Left-click on the desired CNF file to open a menu where you can choose from multiple actions;
- Choose "Open in Application" and click "Other";
- Look at the bottom of the window, where you will see the "Enable" menu. "Recommended Programs" will be selected as the default option;
- Within this menu select "All Programs" and navigate to Sublime Text. Check the box next to "Always open in app" to make sure it’s the default option.
Change default programs in Windows
- Start the process by right-clicking on your CNF file and selecting "Open With". From there, click "Choose another app" to continue;
- From the options listed in the pop-up window, specifically choose Sublime Text as the application to handle your CNF file;
- Be sure to check the "Always use this app" checkbox and click "OK" to save your preference.
Troubleshooting guide for CNF file complications
When issues arise with CNF files, they can generally be fixed with small software tweaks. Use the troubleshooting tips below to help resolve them.
What are the possible solutions to recover a corrupt CNF file?
Start a recovery program, open the damaged CNF file and then select the "Repair" menu item to start the repair procedure. Wait for the recovery process to finish, allowing automatic repair of damaged configuration files.
How can I confirm if my CNF file has been damaged?
The signs of corrupted CNF configuration files can manifest as:
- The file shows slow performance when edited in Atom;
- The file stops responding or freezes in Sublime Text or other programs;
- The file does not respond or shows errors when opening it;
- Unexplained CNF file size inflation;
- The file operation is accompanied by the display of error messages;
What are the possible causes of Sublime Text crashing?
Lack of regular software updates can cause Sublime Text to crash. Make sure you have installed the latest updates for Sublime HQ Pty products.
Restarting your computer is a crucial troubleshooting measure that can alleviate numerous common problems. Therefore, it is advisable to restart your computer before modifying any settings related to the software.
How to edit a CNF file?
To modify CNF files, it is necessary to install dedicated software that lets you open and edit configuration files. Online CNF editors generally offer fewer tools compared to programs designed for MySQL Configuration Format.
Best CNF Editor Software in 2026
Taking into account the provided details, we have prepared a list of CNF editors that match your needs.
| CNF 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) |