How to Show File Extensions in Windows

When trying to find out what type of file a file is, it can be quite a slow job, you can choose to group the files by file type; or you could show the file extensions in the file names. This can be handy if looking through a huge folder of documents or images.

Go to your Control panel and double-click on "Folder Options". This should open up a window. Click on the "View" tab and uncheck the box beside "Hide extensions for known file types".