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Caesar Cipher Tool

Experiment with the classic Caesar shift cipher and quickly preview ROT13 or custom alphabet rotations.

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Shift

3

Result

Dwwdfn dw gdzq

Where it helps

This is useful for security learning, puzzle solving, classroom demos, and any quick check of simple alphabet-rotation rules.

Usage notes

  • Only English alphabet characters are shifted. Numbers and punctuation stay the same.
  • ROT13 is simply a Caesar shift of 13.
  • Uppercase and lowercase characters keep their original case.

Frequently asked questions

Does it transform Korean or numeric characters?expand_more

No. The current implementation shifts Latin alphabet characters only.

Can I use this for real encryption?expand_more

No. Caesar cipher is a classic educational technique and should not be used as modern security.

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