Uninstall

Karabiner-Elements provides built-in uninstaller.
Use the uninstaller to remove Karabiner-Elements from your system.

You can launch the uninstaller from “Uninstall Karabiner-Elements” button on Misc tab.

Uninstall from command line

If you don’t want to use above GUI, you can also uninstall Karabiner-Elements from command line.

sudo '/Library/Application Support/org.pqrs/Karabiner-Elements/uninstall_core.sh'

(Administrator password is required to run the above command.)

Advanced topic

Operation not permitted error will occur if you try removing files by rm command.

sudo rm -rf /Applications/Karabiner-Elements.app
rm: /Applications/Karabiner-Elements.app/Contents: Operation not permitted
rm: /Applications/Karabiner-Elements.app: Operation not permitted

Karabiner-Elements forces you to use uninstaller to remove files in order to ensure remove files outside /Applications.

See Installed files to confirm the files.