ROT13 Cipher Generator

Create Cipher Code from Your Text

The ROT13 (rotate by 13 places) cipher is a simple letter substitution cipher that replaces a letter with the 13th letter after it in the alphabet. ROT13 is a special case of the Caesar cipher, which was developed in ancient Rome.

To encode a message, simply shift each letter in your message 13 places down the alphabet. For example, 'A' becomes 'N', 'B' becomes 'O', and so on. Once you reach 'Z', loop back to the beginning of the alphabet and continue counting from 'A'.

To decode a message, you do the exact same thing! Because there are 26 letters in the alphabet, shifting 13 places to the right (encoding) or to the left (decoding) will give you the original letter. This means that the ROT13 cipher is its own inverse.
To generate a cipher, simply enter your plaintext message into the input field and press the 'Generate' button. The generator will automatically convert your message into a ROT13 cipher.

To decode a cipher, enter the ciphered text into the input field and press the 'Generate' button. The generator will automatically convert the cipher back into plaintext.

To maintain the immersive experience of the game, clues for identifying and solving the cipher should be intuitive and clear. If the cipher is too complex, players may spend more time puzzling over it than actively engaging in the game.

The most effective clues are those that blend seamlessly into your story and setting. Aim to weave these hints into the fabric of your game's narrative, rather than inserting them arbitrarily.

The following list of suggested hints can be used to guide your players towards solving the cipher in a timely manner. These clues are designed to be obvious enough to keep the game moving, while still providing a satisfying challenge.

A Cryptic Note: "The key to understanding lies in the unlucky number. Rotate your perspective by this count and the truth will be revealed."
A Scholar's Journal: An entry in a scholar's journal discussing ancient ciphers, with a particular emphasis on Caesar's cipher and the special case when the shift is half of the alphabet.
A Book on Cryptography: A book on cryptography left open to a page discussing the ROT13 cipher.
A Newspaper Clipping: A newspaper clipping about a famous codebreaker who was known for using the ROT13 cipher. The article could mention the cipher by name and explain how it works.
A Poem: A cryptic poem that hints at the cipher. For example: "In the alphabet's dance, a step of thirteen, reveals what is hidden, and shows the unseen."
A Riddle: A riddle that hints at the cipher. For example: "I am a number, both lucky and cursed. In the alphabet's cycle, I am halfway first. What am I?"
A List of Code Words: A list of code words with their ROT13 equivalents next to them. This could be presented as a cheat sheet or a practice exercise for learning the cipher.
A Cryptic Message: "To see the truth, you must walk halfway around the alphabet's circle."
A Coded Document: A document with a header that reads "ROT13 Encoded" or "Encoded with a Shift of 13".
A Painting: A painting with 26 figures or objects, and the 13th figure or object being somehow different or out of place.
A Broken Clock: A clock that is stuck at 1:00, or 13:00 in 24-hour time, could be a subtle hint towards the key number.
A Star Chart: A star chart with the 13th brightest star highlighted or marked in some way.
A Deck of Cards: A deck of cards with the king (the 13th card in a suit) conspicuously placed or highlighted.
A Series of Paintings: A series of 26 paintings, and the 13th painting is noticeably different or has a unique element.