ROT13 Cipher

ROT13 (Rotate by 13 places) 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 and is its own inverse - applying ROT13 twice returns the original text.

ROT13 is commonly used for:

• Text Obfuscation: Hide spoilers, jokes, or answers in plain sight
• Simple Encryption: Basic text encoding (not secure for real encryption)
• Educational Purposes: Learn about cipher algorithms
• Forum Discussions: Hide spoilers or sensitive content
• Puzzles: Create simple decoding challenges

ROT13 only affects letters (A-Z, a-z), leaving numbers, punctuation, and special characters unchanged. Since it's its own inverse, you can use the same tool to both encode and decode ROT13 text. While it's not secure for real encryption, it's perfect for casual text obfuscation.