Buzz
The file extension helps the computer identify the file type and which software can open it. The easiest way to change a file extension is by saving it as a different file format within a software. While renaming the file extension does not alter its file type, it will cause the computer to recognize the file differently. On both Windows and Mac OS X, file extensions are typically hidden. This guide shows you how to save a file as a different file type in almost any software and also explains how to display file extensions in Windows and Mac OS X.
Steps
Changing file extensions in most software
Open the file using the default software.
Click the File menu and select Save As.
Choose a location to save the file.
Give the file a name (File name).
In the Save As window, locate the dropdown menu labeled Save As Type or Format.
Select the new file type from the dropdown menu.
Click Save. The original file remains open in the software.
Look for the newly saved file in the selected location.
Displaying file extensions on Windows
Open the Control Panel. Click the Start menu and select Control Panel. If you're using Windows 8, click here.
Click Appearance and Personalization in the Control Panel.
- In Windows 8, click Options from the Ribbon interface.
Click Folder Options.
Click View in the Folder Options window.
Show file extensions. In the Advanced settings list, scroll down until you see Hide extensions for known file types. Uncheck the box to disable it.
Click Apply and then click OK.
Open Windows Explorer to view the file extensions.
Displaying file extensions in Windows 8
Open Windows Explorer.
Click View.
In the View/Hide section, check the box for File name extensions.
When you open a new Windows Explorer window, file extensions will be visible.
Displaying file extensions on Mac OS X
Select a Finder window (the search tool) or open a new Finder window. You can also click Desktop to switch to Finder.
Click the Finder menu and select Preferences.
Click Advanced in the Finder Preferences window.
Check the box for Show all filename extensions.
Close the Finder Preferences window.
Open a new Finder window. The file extensions are now visible.
