🔄 ROT13 Encoder
Encode and decode text using the ROT13 cipher. Output updates as you type.
What is ROT13?
ROT13 ("rotate by 13 places") is a simple letter substitution cipher. Each letter is replaced by the letter 13 positions after it in the alphabet.
Examples:
A → N, B → O, C → P, ... M → Z, N → A, O → B, etc.
"Hello" → "Uryyb"
"Secret" → "Frperg"
Fun fact: Applying ROT13 twice returns the original text! It's commonly used to hide spoilers or puzzle answers online.
ROT13 ("rotate by 13 places") is a simple letter substitution cipher. Each letter is replaced by the letter 13 positions after it in the alphabet.
Examples:
A → N, B → O, C → P, ... M → Z, N → A, O → B, etc.
"Hello" → "Uryyb"
"Secret" → "Frperg"
Fun fact: Applying ROT13 twice returns the original text! It's commonly used to hide spoilers or puzzle answers online.