Scramble or unscramble text with ROT13 or ROT47 in real time. ROT13 rotates letters, ROT47 covers all printable ASCII — and because both are self-inverse, the same button encodes and decodes. Everything runs entirely in your browser.
ROT13 shifts each letter 13 places (A↔N, B↔O…) and leaves everything else untouched. Applying it twice returns the original.