Duplicate Menu
Duplicate Menu adds a one-click button to the WordPress menu editor that creates an exact copy of any navigation menu including all menu items, hierarchy, custom links, CSS classes, and other settings. This is invaluable when you need to experiment with menu changes without risking your live navigation, create seasonal variations of your standard menu, or set up similar menus for different locations. The duplicated menu is created instantly and you are automatically redirected to edit it. The module integrates cleanly into the existing Appearance > Menus page with no separate settings page needed.