Cipher Decoder

Encode and decode Caesar, ROT13, Atbash, Base64 and reverse ciphers โ€” with auto-detect

Choose a cipher

Input

Output

Your result appears here.

About these ciphers

Caesar shifts each letter by a fixed amount (Julius Caesar used 3). ROT13 is Caesar-13. Atbash mirrors Aโ†”Z, Bโ†”Y, etc. Reverse flips the entire string. Base64 encodes any text or binary as a safe ASCII string.

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