ROT13 Encoder

What is ROT13 Encoder?

Encode and decode text using the ROT13 Caesar cipher, which shifts each letter 13 positions in the alphabet. Since there are 26 letters, applying ROT13 twice returns the original text — it's its own inverse.

How to use

1. Type or paste your text into the input field — encoding happens in real time.
2. The ROT13 output appears instantly. Since ROT13 is symmetric, pasting encoded text decodes it.
3. Copy the result to clipboard or download as a text file.

Result

Encoding 'Hello World' produces 'Uryyb Jbeyq'. Pasting 'Uryyb Jbeyq' back produces 'Hello World'. Numbers and punctuation remain unchanged.

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