rot13
ROT Encoder
Encode text with ROT13, ROT5, ROT18, ROT47, and custom Caesar shifts
2 free tools
ROT13 is a simple substitution cipher that shifts each letter by 13 positions in the alphabet. Applying it twice returns the original text, making it its own inverse. The more general ROT-N variant lets you shift by any number from 1–25. These tools are commonly used to hide puzzle solutions, obscure spoilers, or demonstrate basic cipher concepts.
ROT13 substitutes each letter with the one 13 places ahead in the alphabet. A→N, B→O, and so on. Because the alphabet has 26 letters, applying ROT13 twice restores the original text.
No. ROT13 is trivially reversible and provides no real security. It is used for casual content hiding, not for protecting sensitive information.
ROT-N is a generalized version of ROT13 where N can be any shift value from 1 to 25. ROT13 is the most common because its self-inverse property makes encoding and decoding identical.