How to Change a File Extension

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Last Updated: March 22, 2024 Tested

Do you need to change the extension of a file so you can open it in a different program? Renaming a file in Finder or File Explorer won't be enough—you'll need to save the file in a different format from a program. But don't worry—it's super easy! This wikiHow article will teach you how to change a file's extension by saving it in a different format. We'll also show you how to show hidden file extensions in Windows and macOS so extensions are always visible.

How do you change a file type?

Open the file as you normally would and select "Save As" from the File menu. Choose where you'd like the file to be saved, and use the "Save as type" drop-down menu to change the extension for your file. Then, hit "Save"—you can find the file wherever you chose to save it.

Method 1

Method 1 of 4:

Changing a File Extension in Nearly Any Software Program

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Open a file in its default software program.
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The original file will still be open in the software program.

Method 2

Method 2 of 4:

Making File Extensions Visible on Windows

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Click the Start menu, and then click Control Panel. If you're using Windows 8, click here.
2
Click Appearance and Personalization. You can find this in the Control Panel.
- On Windows 8, in the ribbon, click Options.
In the Advanced settings list, scroll down until you see Hide extensions for known file types. Click the box to uncheck it.

Method 3

Method 3 of 4:

Making File Extensions Visible on Mac OS X

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You can also click the Desktop to switch to the Finder.
Next, click Preferences.
The files will now show their file extensions.

Method 4

Method 4 of 4:

Making File Extensions Visible on Windows 8

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When you open a new Windows Explorer window, file extensions are visible.

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Question

How do I change the program that my computer uses to open a file?

Community Answer

In order to change which program your computer uses to open a file, right-click on the file in the File Explorer and select "Open with..." to choose your desired program.

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Question

How do I change the file extension on Windows 10?

Community Answer

Go into the explorer, hit "View" and select "Show File Extensions", then rename the file you wish.

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Question

How do I change from a txt to a simple file within any extensions?

Community Answer

Files in general require an extension. You can change it to a different extension, but you can't simply remove all extensions.

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