For Windows 11 For Windows 10
How to show/hide file extensions?
Other Windows 11 settings and usage are summarized, so please refer to it.
For folder options
Check it → Hide extensions Uncheck → Show extensions
For Registry Editor
Value data “0” → Show extension Value data “1” → Hide extension
For command prompt
That was how to show/hide file extensions in Windows 11. Please take a look at how to set up and use Windows 11. Also, please see related articles.