localStorageの内容を全部出力する

function showAllStorage()
{
	var values = [],
	keys = Object.keys(localStorage),
	i = keys.length;

	while ( i-- ) {
		console.log( keys[i] + ': ' + localStorage.getItem(keys[i]) );
	}
}

stackoverflow.com

まんま参考にしただけですが
めも