An AppleScript that hides the extension of all images in a folder

Hide Finder extensions.scpt

# Interchange the following two for a Quick Action.
# on run {input, parameters}
on run
	# Remove the following for a Quick Action.
	set input to choose folder with prompt "Please select a document to pcoess:" with multiple selections allowed
	
	tell application "Finder"
		repeat with eachItem in input
			# Recursively search through all subfolders.
			if kind of eachItem is "Folder" then
				set allFiles to (every file in entire contents of folder eachItem)
				repeat with eachFile in allFiles
					my hideExtension(eachFile)
				end repeat
			else
				set eachFile to eachItem
				
				my hideExtension(eachFile)
			end if
		end repeat
		
		display dialog "Image extensions have been successfully hidden."
	end tell
	return
end run

on hideExtension(theFile)
	tell application "Finder"
		if extension hidden of theFile is false then
			# Such as jpeg.
			# set fileExtension to name extension of theFile
			
			# Such as JPEG image.
			set theKind to kind of theFile
			
			if theKind ends with "image" then
				set extension hidden of theFile to true
			end if
		end if
	end tell
end hideExtension

This is an AppleScript that allows you to hide file extensions in Finder on macOS. It can be easily modified to suit your needs.

If you would like to use it as a Quick Action in Finder, simply create a Quick Action in Automator, and set it to run this AppleScript. You should only change two lines according to the comments. Afterwards, you can select files and folders in Finder as usual, right-click, and select your action from the Quick Actions menu.