ROT13 Cipher Encoder / Decoder – Online Text Obfuscator
Easily encode or decode any message using the ROT13 cipher. This tool replaces each letter with the letter 13 places after it in the alphabet – great for hiding spoilers, puzzles, or casual privacy.
🔁 Enter Text to Encode or Decode
Output
✨ Features
- One-click encode/decode with ROT13
- Great for puzzles, email obfuscation, and casual privacy
- No account required – instant conversion
- Browser-only logic – safe & secure
❓ Frequently Asked Questions
What is ROT13?
ROT13 is a simple letter substitution cipher that replaces each letter with the 13th letter after it in the alphabet.
Is ROT13 encryption?
Not really – it's more of an obfuscation method. ROT13 is easily reversible and not secure for real encryption.
Can I decode ROT13 back to normal text?
Yes! ROT13 is its own inverse – applying it twice brings back the original text.