🔐 ROT13 / Caesar Cipher
Encode or decode text using ROT13 or any Caesar cipher shift (1–25).
13
Output will appear here…
About Caesar Cipher
The Caesar cipher shifts each letter in the alphabet by a fixed number of positions. ROT13 (shift of 13) is self-inverse — applying it twice returns the original text. It was historically used to obscure spoilers and punchlines in newsgroups.
ROT47 extends the shift to cover all printable ASCII characters (33–126).