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Caesar cipher: Encode and decode online Method in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet. The method is named after Julius Caesar, who used it in his private correspondence.
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Tool to decrypt/encrypt with Caesar cipher (or Caesar code), a shift cipher, one of the most easy and most famous encryption systems, that uses the substitution of a letter by another one further in the alphabet.
50+ encryptions/encodings supported such as binary, Morse code and Base64. Classical ciphers like the Caesar cipher, Affine cipher and the Vigenere cipher. Along with modern encryption like repeating-key XOR and more. For the full list, click here.
Are you unsure that your cipher is a Caesar cipher? Use the Cipher Identifier to find the right tool. Text Options... You can decode (decrypt) or encode (encrypt) your message with your key. If you don't have any key, you can try to auto solve (break) your cipher.
Caesar Cipher Decoder & Encoder Tool. The Caesar Cipher Tool allows you to encrypt and decrypt text using the classic Caesar Cipher algorithm. When you are selecting a key, such as 13, the tool performs encryption similar to ROT13, shifting each letter by 13 places to obscure the original message.
Our online tool brings this ancient cipher into the digital age, allowing you to easily encrypt or decrypt text with a custom shift key. Whether for educational purposes, cipher challenges, or just for fun, our tool is designed to be intuitive and easy to use.
You may break the cipher in a brute-force attack by deciphering the ciphertext at hand using all possible shift values and choosing the original text among them. The latter can be done intuitively or automatically using a dictionary or statistical manners (e.g. frequency analysis ).
