▥ SECURITY Updated July 25, 2026

Caesar Cipher Encoder & Decoder

Shift letters by any amount to encode or decode a classic Caesar cipher.

Text
Shift
Mode
Cipher output
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How it works

Each letter is shifted forward or backward by your chosen number of positions in the alphabet, wrapping from Z back to A, while digits, spaces and punctuation are left untouched.

Related tools

◐Password Generator◪Hash Generator◪Password Strength Checker

Frequently asked questions

What is ROT13?

It is a Caesar cipher with a shift of 13 — applying it twice returns the original text.

Is a Caesar cipher secure?

No. With only 25 possible shifts it is trivially broken and should be used only for puzzles and obfuscation, never real secrets.

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