How to Show File Extensions in Windows

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enable file extensions

When dealing with documents, pictures, music or even software install files, it's very helpful to know your file extension. For example,  if the boss emails you a report named "quarterlyreport.xlsx," you can tell just from the four letters after the period that it's an Excel spreadsheet, which is compatible only with Office 2007 or later (earlier versions used the .xls extension).

However, Microsoft doesn't think you need to know about file extensions so it sets Windows to hide them by default, hoping that the file icon and description (ex: "Microsoft Word Document") will give you enough information. Here's how you can unhide them.

MORE: Windows 8.1 Tips and Tutorials

1. Launch Control Panel. In Windows 8 / 8.1, you can get by hitting Windows + X and selecting from the menu that appears.

select control panel

2. Open Folder Options. If you don't see the Folder Options icon right away, you can find it by typing Folder Options into the search box at the upper right corner of the control panel window.

find folder options

3. Select the View tab.

select view tab in folder options

4. Toggle "Hide extensions for known file types" to off.  We also recommend changing Hiden files and folders to "Show hidden files, folders and drives" so you can access all of Windows' system folders. 

show file extensions

5. Click Ok. Now, any time you browse your file system, you will see all file extensions.


Author Bio
Avram Piltch
Avram Piltch, LAPTOP Online Editorial Director
The official Geeks Geek, as his weekly column is titled, Avram Piltch has guided the editorial and production of since 2007. With his technical knowledge and passion for testing, Avram programmed several of LAPTOP's real-world benchmarks, including the LAPTOP Battery Test. He holds a master’s degree in English from NYU.
Avram Piltch, LAPTOP Online Editorial Director on
Add a comment
  • Pam Mahony Says:

    I got as far as Control Panel/view. Then you lost me.I have the ext "screen shots" enabled, but I still cannot figure out how to actually take a screen shot.... I am using 8.1 in "classic mode"

  • JGates Says:

    Angry Guy..... wow.. just.. wow.. Windows 8.1 is NOT backwards. It's very simple. Dos is outdated, get with the times. 4 hours you lost for what? Something that could have been searched on google and corrected in a matter of minutes? lol

  • angry guy Says:

    im an old fart.... I got used the dos 3.3 then tried to follow as Microsoft ""evolved""...

    microasoft don't evolving.. this is evolving backward... this is the worst implementation, to hiding file extensions..
    I just spent 4 hour figuring why windows ""cant find the specified file""
    because windows can not recognize its a compressed file.. windows evaluating as a ""application""
    Microsoft must be sued for all lost hair by users

  • Sasha Says:

    Thanks for this. I don't know what their problem is at MS.

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