ROT13 is a Caesar cipher with a fixed shift of 13 positions. Applying ROT13 twice returns the original text.

Does this tool keep punctuation and spaces?

Yes. Only letters are shifted. Spaces, punctuation, numbers, and symbols remain unchanged.

Can I use shifts other than 13?

Yes. You can choose any Caesar shift from 1 to 25. ROT13 is preselected by default.

Instantly encode or decode text with ROT13, or choose any Caesar shift from 1 to 25. Punctuation, spacing, and numbers are preserved.

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Input text

Mode

Shift amount

Tip: ROT13 uses shift 13 and works the same for encoding and decoding.

Output text

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ROT13 is commonly used for light obfuscation, puzzle hints, and spoilers. It is not secure encryption.

Yes. Only A-Z and a-z characters are shifted. Everything else stays exactly the same.

Yes. Choose Caesar mode and adjust the shift. Using a shift of 26-n reverses shift n.

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