# Show extensions
Show all file extensions in the Finder.
- Tested on macOS:
- Big Sur
- Catalina
- Mojave
- Parameter type: bool
# Set to false (default value)
defaults write NSGlobalDomain AppleShowAllExtensions -bool false && killall Finder
- Do not show all file extensions inside the Finder
# Set to true
defaults write NSGlobalDomain AppleShowAllExtensions -bool true && killall Finder
- Show all file extensions inside the Finder
# Read current value
defaults read NSGlobalDomain AppleShowAllExtensions
# Delete current value
defaults delete NSGlobalDomain AppleShowAllExtensions && killall Finder