🔄ROT13 Encoder
Encode and decode text using the ROT13 substitution cipher.
Enter text above to encode or decode with ROT13.
About ROT13
- ROT13 shifts each letter by 13 positions in the alphabet
- Applying ROT13 twice returns the original text (it is its own inverse)
- Non-alphabetic characters (numbers, punctuation, spaces) are left unchanged
- Both uppercase and lowercase letters are supported
- ROT13 is a simple substitution cipher, not suitable for real security
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