ROT13 Encoder

Encode your text using the simple, reversible Caesar cipher known as ROT13.

Home ROT13 Encoder
The ROT13 Encoder applies a simple letter substitution cipher, shifting each letter 13 places down the alphabet. A quick utility for light obfuscation or solving puzzles. Since ROT13 is its own inverse, the encoder acts as a decoder too. Encode/Decode ROT13 now!

Enter text to encode with ROT13. ROT13 shifts each letter by 13 positions. Example: Hello → Uryyb

ROT13 Encoder

Example Texts

  1. 1 Enter Text: Type or paste the message you want to lightly obscure (e.g., `Hello`).
  2. 2 Encode: Click "Apply ROT13".
  3. 3 View Encoded Text: The output will display the text with each letter shifted 13 places (e.g., `Uryyb`).

What is the ROT13 cipher?

ROT13 (Rotate by 13 places) is a simple, symmetric substitution cipher where the letter is replaced by the letter 13 positions after it in the alphabet.

Is ROT13 a secure form of encryption?

No, ROT13 is a very weak encryption method, mainly used for mild obfuscation, hiding puzzle spoilers, or for fun. It offers no cryptographic security.

How do you decode ROT13?

The beauty of ROT13 is that applying the ROT13 cipher twice to an encoded message returns the original text. You can use the same tool to decode it.

Hiding Spoilers

Example Keyword: encode text to hide spoiler
Obfuscate a puzzle answer or a movie/game spoiler in a forum or message board.

Puzzle Creation

Example Keyword: create rot13 encoded message
Quickly generate a simple cipher text for a game or intellectual challenge.

Light Obfuscation

Example Keyword: rot13 encoder for fun
Send a mildly obscured message to a friend who knows how to quickly decode the cipher.

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