Encoding Tools
ROT13 Tool
Apply ROT13 letter substitution cipher that rotates alphabetic characters by 13 positions (A↔N, B↔O, etc.). Since 13 is half of 26, applying ROT13 twice restores the original text. Used for obfuscating spoilers, puzzles, and email addresses. Not secure—purely for obfuscation.
Updated 2025-12-02
ROT13 Tool
ROT13 letter substitution cipher
Rotate alphabetic characters by 13 positions. Apply twice to decode.
ROT13 is a simple letter substitution cipher that rotates alphabetic characters by 13 positions (A↔N, B↔O, etc.). Since 13 is half of 26, applying ROT13 twice restores the original text. Used for obfuscating spoilers, puzzles, and email addresses. Not secure—purely for obfuscation. All processing is local.