Practical uses of anagram makers include generation of passwords and mnemonics. Anagrams were historically used in encryption, and are still used as a weak encryption method today. Everyday uses of anagrams include amusing wordplays, or brainteasers that focus on rearranging anagrams, such as certain types of cryptic crossword clues.
For password generation, a user provides a word to the anagram maker, which then suggests anagrams that the user assesses for suitability. Anagram makers that create multi-word anagrams help people find strong and memorable passphrases.
Anagram makers are also popular in crossword puzzles. The standard form for cryptic anagram clues is explained on BestForPuzzles.com. A free online anagram maker is available at Wordsmith.org.