ROT13 Encoder/Decoder
Encode and decode text using ROT13 cipher
Enter text above to see result
How to Use
- Enter the text to encode or decode.
- The ROT13 result appears in real time. ROT13 encoding and decoding are the same operation.
- Enable the ROT5 option to also transform digits.
FAQ
What is ROT13?
ROT13 is a simple letter substitution cipher that replaces each letter with the letter 13 positions after it in the alphabet. Since the alphabet has 26 letters, applying the same transformation twice returns the original text.
What is ROT5?
ROT5 shifts digits (0-9) by 5 positions. When combined with ROT13, it is known as ROT13/ROT5 (or ROT18), transforming both letters and numbers.