How to Save a File With a Different Extension
Occasionally, it is necessary to use a program to save a file with an extension that is not used by default. One common scenario in which this occurs is when Microsoft Notepad is used to create a file in plain text and save it with the .HTM extension for viewing online. This article details the process of saving a file with the extension of your choice using most applications, or changing the file extension after the file is saved if the application is unable to do so.
Instructions
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Saving a file with a different extension in the application
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Open the "Save As" dialog in the application that you are working with. In most cases, "Save As" is located on the "File" menu.
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Click the "Save As Type" drop-down menu and select "All Files."
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Type the full file name that you want to use, including the extension (e.g., "index.htm").
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Click "Save."
Changing a file extension with Windows Explorer
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Click the Windows "Start" button and then click "My Computer" in Windows XP or "Computer" in Windows Vista and 7.
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Click "Tools" and then click "Folder Options" in Windows XP. In Windows Vista and 7, click "Organize," then click "Folder and Search Options."
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Click the "View" tab. Remove the check from the box labeled "Hide extensions for known file types" and click "OK."
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Right-click on the file that you would like to change the extension of and click "Rename." Remove the current file extension and type the one that you would like to use. Hit the "Enter" key when you are done.
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