Learn how to change a file’s extension in Windows 7.
A file’s extension tells the computer what type of file it is. The extension consist of a unique combination of letters and numbers that follow a period at the end of the file name. For example: an Adobe PDF file has the extension .pdf, or a Microsoft Word document will have a .doc or .docx extension. So a Microsoft Word 2010 document would look like word-document.docx if the file extension were showing instead of word-document. The computer keeps a list of known file extensions handy so that it knows how to deal with each extension it may come across.
By default Windows hides file extensions so that the file names are less confusing for non-technical people.
Change a File’s Extension
- First, you need to enable the show file extension option.
- Next, click on the file you want to change the file extension one time, pause for a second, and click it again.
- The file’s name will become highlighted. Erase the file’s extension and replace it with the new one, and then press Enter on your keyboard.
- Click Yes when asked if you’re sure you want to change the file’s extension.
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