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ROT13 Cipher

Encode/decode text using ROT13 algorithm

ROT13 is a simple letter-substitution cipher that replaces each letter with the one 13 positions after it in the alphabet. Because the alphabet has 26 letters, applying ROT13 twice returns the original text — making it its own inverse. It's commonly used to hide spoilers online.

Input
0 chars·0 words
Output
0 chars·0 words

How to use

  1. 1Paste plain text to encode it, or paste ROT13 text to decode it.
  2. 2The result appears instantly — ROT13 is self-inverse.
  3. 3Copy the encoded/decoded output.