Showing File Extensions

Written by Eric Wyatt (last updated June 7, 2021)

The more you use your computer, the more you will increase the number of files on your computer. As this continues it can become helpful to see file extensions associated with the files on your system. File extensions are found at the end of a file. File extensions are preceded by a period and are typically two to four characters long. File extensions are often used to identify what type of file it is and what program will open the file. An example is a ".docx" file, which is a Microsoft Word file.

When you open a file, Windows looks at the extension and uses whatever program is associated with that extension to open it. Seeing the file extension can also help you to quickly identify the program needed for the file.

Regardless of how helpful seeing file extensions can be, Windows hides those extensions by default. (Of course it does.) To have Windows show file extensions, follow these quick steps:

  1. Press the Windows key and type, (without quotes) "File Explorer Options", then press Enter. Windows opens the File Explorer Options window.
  2. In the File Explorer Options window, click the View tab. As the name indicates, this shows the viewing options for File Explorer.
  3. Uncheck the box that says "Hide Extensions for Known File Types." Click Apply, and then OK. When done you can close the File Explorer Options window. Changes will take effect immediately.

This quick change to enable file extensions allows you to know the document type along with giving an idea about what program is needed to open the file.

 This tip (13869) applies to Windows 10.

Author Bio

Eric Wyatt

Eric Wyatt is a swell guy (or so his friends tell him). He is a formally trained designer and branding expert, bringing a wide range of skills to his Tips.Net articles. ...

MORE FROM ERIC

Use PowerShell to Find Your Computer Serial Number

When you need your computer's serial number you can look it up without looking on the outside of the box. Use PowerShell ...

Discover More

Use Cmd to Find Your Computer Serial Number

You can access your computer's serial number without looking all over on the outside of the box. Use the Command prompt ...

Discover More

Which Version of Windows am I Running?

With Windows it has always been helpful to know what version you are running. With Windows 10 knowing the version isn't ...

Discover More
More WindowsTips

Displaying Details about a Graphics File

Graphics files have additional attributes that other files don't have. This tip describes how you can display these ...

Discover More

Using Offline Files

If you need access to files on a network but aren't always on the network, you may find that the offline files feature of ...

Discover More

Determining How Much Space the Files in a Folder Require

Want to know how much space is required by all the files in a folder? There are a couple of very easy ways to get this ...

Discover More
Comments

If you would like to add an image to your comment (not an avatar, but an image to help in making the point of your comment), include the characters [{fig}] (all 7 characters, in the sequence shown) in your comment text. You’ll be prompted to upload your image when you submit the comment. Maximum image size is 6Mpixels. Images larger than 600px wide or 1000px tall will be reduced. Up to three images may be included in a comment. All images are subject to review. Commenting privileges may be curtailed if inappropriate images are posted.

What is six more than 1?

There are currently no comments for this tip. (Be the first to leave your comment—just use the simple form above!)

Newest Tips
Links and Sharing
OUR COMPANY
OUR PRODUCTS
OUR SITES
 

Copyright © 2026 Sharon Parq Associates, Inc.