Caesar Cipher
Hash & EncryptionShift letters in your text by a fixed number of positions.
About This Tool
The classic Caesar shift cipher. Choose your shift key and instantly encode or decode messages using one of the most famous historical encryption techniques.
Frequently Asked Questions
Julius Caesar used this shift cipher with a key of 3 to protect military messages. It is a type of substitution cipher where each letter is replaced by a letter some fixed number of positions down the alphabet.
The shift key is the number of positions each letter is moved. For example, with a shift of 1, A becomes B. With a shift of 3, A becomes D.
Since there are only 25 possible shifts, a Caesar cipher is very easy to break using frequency analysis or a simple brute-force attack trying all possible keys.
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