How to Hide and Unhide File Extension

There are many different types of computer applications use on different file types. The file name is commonly followed by a “dot” (also referred as “period” in technical term) and the file extension. Examples of some common filename extensions are .png, .jpeg, .exe, .dmg and .txt.

You can change a file's name but it is best not to change the file extension as these file extensions are used to identify useable files. Any ‘illegal’ changes on the file extension may cause the file unusable even if you try to revert back. 

You may experience that all your files have shown the related file extensions are suddenly ‘appearing’ which you might have accidentally configured something that you are not aware of. But you do not know to ‘hide’ these file extensions.

On this post, I'll show you how you can easily to ‘hide’ these file extensions and just leave your filename appear on your computer. For some people who prefer to have their file extension ‘show’ on your computer, you can also go through a few quick simple steps below.

1.    Start > Type “folder options” in the Search box > Enter

2.    Select “View” Tab

3.    To show the file extension, deselect (uncheck / untick) on the option “Hide extensions for known file types” > Click “Apply”.

4.    To make the file extension 'disappear', select (check / tick) on the option “Hide extensions for known file types” > Click “Apply”