ROT13 Encoder / Decoder
Encode or decode ROT13 text instantly. ROT13 is its own inverse, so the same button hides and reveals a message.
Input
Result
How to use
What ROT13 does
ROT13 replaces each letter with the letter 13 positions after it. Because the alphabet has 26 letters, applying it twice returns the original text.
- Paste the text to transform.
- Press Convert.
- Convert again to reverse.
Frequently asked questions
Is ROT13 secure?
No. ROT13 is a simple obfuscation and should never be used to protect sensitive data.
Are numbers and symbols changed?
No, only the letters A-Z are shifted. Digits, spaces and punctuation stay the same.
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