Encode and Decode ROT13
Use ROT13 to obscure text — the go-to cipher for spoilers, puzzle answers, and content warnings.
Shifts each letter by 13. Self-inverse — applying it twice returns the original.
ROT13 tips
ROT13 shifts every letter by 13 positions. It's self-inverse: applying it twice returns the original text — so encode = decode.
ROT13 is widely used on forums and communities to hide spoilers. Readers can decode at their own choice without the answer being immediately visible.
Puzzle solutions and hints in some games are ROT13-encoded in readme files and FAQs — a convention dating back to Usenet in the 1980s.
ROT13 does not encrypt letters, digits, or punctuation — only the 26 Latin letters are shifted. Non-letter characters pass through unchanged.
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