Tip: You can change/rename the extension of a file or multiple files using the ChangeExtension method :
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Windows 10 Change File Extension
Single file
How To Change File Type In Windows
Mar 06, 2020 For example, you cannot rename a file with a '.txt' extension to a '.jpg' and make it an image. If you want to change the file type, you need to convert the file. With an '.exe' file and other file extensions, you may need to use a program to create the file. Renaming in MS-DOS and the Windows command line. Nov 24, 2014 Now right-click on your file and choose Rename. Move to the end of the name and type in.XXX or whatever the type is for the file you want it to be, i.e.TXT for text files,.XLS for Excel files, etc. Obviously, the file has to have originally been from that program that you are changing the file extension too. When changing the extension, you're basically just renaming the file and changing the extension. In order to do that, you need to split the filename by '.' And replace the last entry by the new extension you want.
Rename-Item-Path'C:Demofile01.txt'-NewName$([System.IO.Path]::ChangeExtension('C:Demofile01.txt','.old')) |
Multiple files
Change File Extension Linux
How To Change File Extension
Get-ChildItem-PathC:Demo-Filter*.txt|Rename-Item-NewName{[System.IO.Path]::ChangeExtension($_.Name,'.old')} |