A brain-teasing cryptogram puzzle you can play in your browser. Each letter in a hidden message is swapped for another letter, and your job is to crack the code. Click a coded letter and type your guess, and every matching letter fills in automatically. Letter frequency counts help you spot common letters like E and T. Stuck? Use Reveal Letter, get a hint, or check how close you are. Play with a timer and score, try Hard Mode, level up, and top the leaderboard. No signup.