ROT13 Encoder / Decoder
Apply the reversible ROT13 letter-substitution cipher.
ROT13 Output
What Is ROT13?
ROT13 ("rotate by 13 places") shifts each letter 13 positions through the alphabet. Because the alphabet has 26 letters, applying ROT13 twice returns the original text — encoding and decoding are the same operation. It is widely used to lightly obscure spoilers, puzzle answers, and forum posts. ROT13 offers no real security; it's a fun transformation, not encryption. Everything runs in your browser.
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