How to Change a File Extension?

Changing a file extension is a simple yet crucial task, especially when dealing with different file formats and software applications. The file extension tells the operating system which application to use when opening the file. Incorrectly changing a file extension can render the file unusable or cause errors. This article outlines the key steps to change a file extension on Windows, macOS, and Linux, along with some tips and best practices.

Understanding File Extensions

File extensions are the characters following a period at the end of a file name, indicating the file’s format. For example, in ‘document.txt’, ‘.txt’ is the file extension. Each extension usually corresponds to a specific type of file or software.

Steps to Change File Extension on Windows

Show File Extensions

• Open ‘File Explorer’.
• Click on the ‘View’ tab.
• Check the box ‘File name extensions’.

Now you can see the file extensions for all files.

Rename the File

• Navigate to the file you want to change.
• Right-click and select ‘Rename’.
• Change the extension to the desired one and press ‘Enter’.
• Confirm the change when prompted.

Steps to Change File Extension on macOS

Show File Extensions

• Open ‘Finder’.
• Go to ‘Finder’ > ‘Preferences’.
• Click on the ‘Advanced’ tab.
• Check the box ‘Show all filename extensions’.

Rename the File

• Navigate to the file you want to change.
• Right-click and select ‘Get Info’.
• Change the extension in the ‘Name & Extension’ field.
• Close the info panel. ‘Enter’ to confirm the change.

Steps to Change File Extension on Linux

Using the Terminal

• Open a Terminal window.
• Navigate to the file directory using cd command.
• Use mv oldname.extension newname.newextension to rename the file.

Using File Manager

• Open ‘Files’ or your preferred file manager.
• Navigate to the file you want to change.
• Right-click and select ‘Rename’.
• Change the extension and press ‘Enter’.

Important Considerations

• Make sure the new extension matches the file format to avoid compatibility issues.
• Back up the original file before renaming it.
• If the file becomes unusable after changing, revert it to the original extension.

Conclusion

Changing a file extension is a straightforward process, but it is essential to do it correctly to avoid issues. Whether you are using Windows, macOS, or Linux, follow the steps outlined above, and remember to handle file extensions with care.