ROT13 Encoder and Decoder

Use this ROT13 Encoder / Decoder to apply the reversible ROT13 letter substitution to text. ROT13 shifts each English letter by 13 places, so running the same operation again decodes the text.

What This Tool Does

• Encode text with ROT13
• Decode ROT13 text with the same operation
• Preserve punctuation, numbers, and whitespace
• Keep letter casing where possible

Common Use Cases

• Decoding ROT13 examples from forums or documentation
• Testing simple substitution behavior
• Preparing reversible obfuscated text
• Comparing ROT13 with stronger encoding or hashing tools

Notes

ROT13 is not encryption and should not be used for security. It is only a simple reversible text transformation.

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