ROT13 Cipher
Instantly obscure or reveal text using the classic rotate-by-13 substitution.
ROT13 (Rotate by 13 places) is a simple letter substitution cipher that replaces a letter with the 13th letter after it in the alphabet. Because there are 26 letters in the basic Latin alphabet, applying ROT13 twice restores the original text. It is often used in online forums to obscure spoilers, punchlines, puzzle solutions, or offensive materials.