ROT13 Cipher Encrypt & Decrypt

What is ROT13?

ROT13 is a letter substitution cipher that replaces a letter with the letter 13 letters after it in the alphabet. It is a very simple cipher (but also very weak), already used in ancient Rome. In the early internet days, ROT13 was sometimes used to hide spoilers in Usenet messages. Because 13 is exactly half of the 26 letters, you can use the same algorithm to encrypt and decrypt (decipher) your texts.

With the tools on this page you can also rotate your text with another number of places (ROT1 ... ROT25).

Unccl rapelcgvat!


Copy your input text or encrypted text below. Insert sample text

 -  Rotate letters places

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