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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.
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.
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.
Enter text or code: Enter Key: Encode. Decode. Result: Emperor Julius Caesar developed one of the simplest and most well-known forms of cryptography. To communicate with his generals in times of war, Caesar changed a certain letter of the alphabet for the one that came 3 times in front of him.
The Caesar Cipher, named after the renowned Roman general and dictator Julius Caesar, was used to ensure the security of important military and personal messages. According to historical records, Caesar applied this method of encryption to protect information from enemies, especially during military campaigns.
Decode Caesar Cipher messages with ease using a Caesar Cipher decoder. Learn how this ancient encryption method works and explore its modern.
Caesar cipher, the most widely known encryption technique. Caesar cipher replaces each letter in a text is by a letter a fixed number of places down the alphabet. Open in the editor.
The Caesar cipher offers virtually no cryptographic security, only hiding information from cursory glances. However, it is an excellent introduction to the cryptography concept of symmetric encryption, as it introduces the concept of a key (the "shift"), and the data (the message you want to obscure).
The Caesar Cipher, also known as the shift cipher, relied on a shift of letters (the key) known only to the sender and receiver. Being a monoalphabetic cipher, one letter of the alphabet is replaced by another letter based on a particular shift rule.
Encrypt and decrypt text using the classic Caesar cipher. Our free online tool lets you easily shift letters to create or reveal hidden messages.