Clipboard to UPPERCASE (Windows)

Command:

powershell -command "Set-Clipboard -Value ((Get-Clipboard).ToUpper())"

In Total commander, a button with:

Command: powershell -command "Set-Clipboard -Value ((Get-Clipboard).ToUpper())"
Icon file: %COMMANDER_PATH%\..\ico\papirus\font-x-generic-symbolic.ico
Tooltip: Clipboard to UPPERCASE

p.s. In windows, make a script.bat out of it and make a soft link (shortcut), this so called shortcuts can also have shortkey (ctrl + alt + u) for example.

Total commander can also rename files to Uppercase with single button click:
https://www.ghisler.ch/board/viewtopic.php?p=455303&sid=bfafbe9446f3023230ccd16f57994dc4#p455303