ROT13 Cipher

Encode and decode text using ROT13 cipher.
About ROT13:
  • ROT13 is a simple letter substitution cipher that replaces each letter with the letter 13 positions after it in the alphabet
  • It's a special case of the Caesar cipher with a shift of 13
  • ROT13 is its own inverse: applying it twice returns the original text
  • Only affects letters (A-Z, a-z); numbers and symbols remain unchanged
  • Not secure for encryption - used for obscuring spoilers, puzzle solutions, etc.
ROT13 Reference Table
Original: A B C D E F G H I J K L M
ROT13: N O P Q R S T U V W X Y Z
Original: N O P Q R S T U V W X Y Z
ROT13: A B C D E F G H I J K L M

Features

  • Encode and decode text using ROT13 cipher
  • Real-time transformation as you type
  • Preserves numbers, symbols, and spacing
  • Swap input/output for easy re-encoding
  • Reference table for manual conversion
  • Educational information about ROT13
  • Copy output to clipboard

How to Use

  1. Enter or paste text in the Input Text area
  2. The text will be automatically transformed using ROT13
  3. View the result in the Output area
  4. Click Swap Input/Output to decode the result
  5. Copy the output using the copy button