C File Extension

Programs that support C files

• Windows ¹¹
• Mac OS ⁶
• Linux ⁶

Windows

• Eclipse IDE
• Microsoft Visual Studio
• CodeWarrior Development Studio
• Windows Notepad
• PSPad
• Atom
• C++ Builder
• Notepad++
• RAD Studio
• Sublime Text
• Visual Studio Code

Mac OS

• Xcode
• Microsoft Visual Studio
• TextEdit
• Visual Studio Code
• Sublime Text
• Atom

Linux

• Microsoft Visual Studio
• Atom
• GNU Emacs
• Gedit
• Visual Studio Code
• Sublime Text

How to open a C file?

If you can’t open a C file, it is usually because the necessary software is missing. To resolve the issue, select the right program from the list for your operating system. Then go to the official website of the developer, download the software, and install it.

Eclipse IDE, Xcode and Microsoft Visual Studio stand out as the preferred programs to manage C files effectively. To get the latest version of Eclipse IDE, open the Eclipse website where a universal installer for all operating systems is available.

When you finish installing Eclipse IDE, the system will automatically launch C files with it.

Set Eclipse IDE to open C by default

Change default apps on Mac

1. Right-click or use Control + Left-click on the desired C file to access the file’s context menu;
2. Choose "Open in Application" and click "Other";
3. At the bottom of the window, you will see the "Enable" menu. It is already set to the default option, "Recommended Programs";
4. Within this menu, select "All Programs" and then search for Eclipse IDE. Check the box next to "Always open in app" to make it the default program.

Set default programs for Windows

1. Take the first step by right-clicking on your C file. Next, select "Open With" and then choose "Choose another app" from the available options;
2. Find the Eclipse IDE application in the pop-up window and select it as your preferred program;
3. Select the "Always use this application" check box and click "OK" to save your selection as the default application for opening C files.

Easy C Troubleshooting

When facing challenges with C files, simple adjustments in your software can often solve the problem. Find helpful troubleshooting guidance below.

How to edit a C file?

To make changes to C files, you need specialized software that allows both opening and editing the developer files. Online C editors offer fewer capabilities than applications optimized for C/C++ Source Code Format.

Best C Editor Software in 2026

After analyzing the criteria, we have created a list of C editors available for use.