An mp4 is a video file type, but the .mp4 in the file name is the file extension. Usually, these things should match, but it's possible for that not to be the case.

Change a File Extension the Easy Way The simplest way to change a file extension in Windows 11 is directly in the file name location.

On Windows 11, you can change the format of a file in multiple ways through File Explorer, Command Prompt, and from a compatible application. In this guide, I'll show you how.

How to show filename extensions on a Mac The default setting for Mac OS is to not display a file's extension. For those who want to view the full filename, rather than having the extension removed ...

To show file extensions in Windows, open the File Explorer. Click View on the menu ribbon at the top, and check the box next to File name extensions. To change a file extension, right-click a file ...

How to view file name extensions for a individual file on a Mac Navigate to the file that you wish to be able to see its extension.

Addressing OS X file extensions reverting after change File name extensions are how OS X recognizes file types, and changing the extension is one way to associate a file with a different program.

The filename, along with the extension, highlights. Type "SQZ" to replace the BKF extension in the file name. The file is renamed.

Error 0x800700CE The filename or extension is too long prevents renaming specific files or folders. Here's how to fix the issue properly.