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Caesar cipher and ROT13 decoder

Shift every letter a fixed number of places in the alphabet. Do not know the shift? The table shows all 25, so the readable one stands out.

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How to use the caesar cipher & ROT13

  1. Type or paste the text.

  2. Pick the shift, or 13 for ROT13.

  3. Read the result, or find the readable line in the table of all shifts.

Frequently asked questions

What is ROT13?

A Caesar cipher with a shift of 13. Because the alphabet has 26 letters, applying ROT13 twice gives back the original text. Geocaching.com encodes hints with it.

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