Windows

How do I enable file extensions in Windows?

Updated 2026-08-14

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Quick answer

To enable file extensions in Windows, you need to access the File Explorer options and modify the settings to show file name extensions.

This guide provides steps to enable file extensions in Windows, allowing you to see the full names of files including their extensions.

Steps

  1. 1

    Open File Explorer

    Click on the File Explorer icon in the taskbar or press Windows + E.

  2. 2

    Access Folder Options

    In Windows 10/11, click on the 'View' tab at the top, then select 'Options' on the right side. In earlier versions, find 'Folder Options' in the Tools menu.

  3. 3

    Modify View Settings

    In the Folder Options window, go to the 'View' tab and uncheck the box labeled 'Hide extensions for known file types'.

  4. 4

    Apply Changes

    Click 'Apply', then 'OK' to save your changes. File extensions will now be visible in File Explorer.

Understanding File Extensions

File extensions indicate the file type and determine which programs can open them. Common extensions include .txt, .jpg, and .exe.

Steps to Enable File Extensions

Follow these steps to view file extensions in Windows.

Watch out for

  • The steps may vary slightly depending on your version of Windows.

FAQ

Will this change affect all users on my computer?

No, this setting is user-specific. Each user account can enable or disable file extensions independently.

How do I revert back to hiding file extensions?

Follow the same steps and check the 'Hide extensions for known file types' box in the Folder Options.

Are there any security implications to showing file extensions?

Yes, showing file extensions can help you identify potentially harmful files, but be cautious as some malware may disguise themselves with misleading extensions.