ROT13 Encoder/Decoder
Encode or decode text using the simple ROT13 substitution cipher.
Input
Output
How ROT13 Works
ROT13 ("rotate by 13 places") is a simple letter substitution cipher that replaces a letter with the 13th letter after it in the alphabet. It's a special case of the Caesar cipher. Because there are 26 letters in the alphabet, applying ROT13 twice will return the original text.
- Enter Your Text: Type or paste your message into the input box.
- Apply ROT13: Click the "Apply ROT13" button. The tool will swap the text between the input and output boxes and apply the cipher.
- Reverse: Clicking the button again will apply ROT13 to the new input, decoding it back to the original text.
Frequently Asked Questions (FAQ)
Q: What is ROT13 used for?
A: ROT13 is not a form of security. It's often used in online forums to hide spoilers, punchlines, puzzle solutions, or offensive material from the casual glance. It's a simple way to obscure text, not secure it.
Q: Does ROT13 affect numbers or symbols?
A: No. The ROT13 cipher only applies to letters of the alphabet. All numbers, symbols, and whitespace characters are ignored and remain unchanged.
Related Keywords
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