ROT13 Encoder

ROT13 encode and decode

What is ROT13?

ROT13 is a simple letter substitution cipher. Applying ROT13 twice returns the original text.

How to Use

  1. Paste text to encode or decode.
  2. Output updates automatically.
  3. Copy transformed text.

Tips & Notes

All processing runs locally in your browser. Your text is never uploaded to our servers.

Frequently Asked Questions

Is ROT13 encryption secure?

No. It is a reversible obfuscation for puzzles and fun, not security.

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