Powershell Tip #108: Bulk change/rename extensions of files

Tip: You can change/rename the extension of a file or multiple files using the ChangeExtension method :

OverloadDefinitions

ChangeExtension-overload

Single file

Rename-Item -Path 'C:\Demo\file01.txt' -NewName $([System.IO.Path]::ChangeExtension('C:\Demo\file01.txt', ".old"))

1	Rename-Item -Path 'C:\Demo\file01.txt' -NewName $([System.IO.Path]::ChangeExtension('C:\Demo\file01.txt', ".old"))

rename-extension-powershell-single-file

Multiple files

Get-ChildItem -Path C:\Demo -Filter *.txt | Rename-Item -NewName {[System.IO.Path]::ChangeExtension($_.Name, ".old")}

1	Get-ChildItem -Path C:\Demo -Filter *.txt \| Rename-Item -NewName {[System.IO.Path]::ChangeExtension($_.Name, ".old")}

rename-extension-powershell-multiple-files