A letter scrambler, also known as a word scrambler, is an application that scrambles a message by rearranging the letters that make up each word. Some of these tools also provide an option to unscramble a message.
The unscramble feature is useful to use with word games, such as Scrabble or Words With Friends. A user can enter his letters, click the unscramble option and see a list of words that are playable on his turn. Some letter scramblers take this option a step further by listing the amount of points a user earns from playing a word that has been unscrambled.