Encode and decode text using the ROT13 Caesar cipher
ROT13 ("rotate by 13 places") is a simple letter substitution cipher that replaces each letter with the letter 13 positions after it in the alphabet. It's a special case of the Caesar cipher.
Key feature: ROT13 is its own inverse. Applying ROT13 twice returns the original text. For example: "Hello" → "Uryyb" → "Hello". Numbers, punctuation, and spaces remain unchanged.
Help others discover this tool!
