ROT13
CAESAR CIPHER
Encode and decode text using the ROT13 Caesar cipher. A simple letter substitution cipher that replaces each letter with the letter 13 positions ahead in the alphabet.
ROT13 is its own inverse - encoding and decoding use the same process
🔄 SYMMETRIC CIPHER
ROT13 is its own inverse - applying it twice returns the original text.
📚 CLASSIC CIPHER
Used historically for simple text obfuscation and spoiler protection online.
HOW ROT13 WORKS
• Each letter is replaced by the letter 13 positions ahead in the alphabet
• A→N, B→O, C→P, ..., M→Z, N→A, O→B, ..., Z→M
• Numbers, punctuation, and spaces remain unchanged... M→Z, N→A, O→B, ..., Z→M
• Numbers, punctuation, and spaces remain unchanged