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Encrypt/decrypt using the Caesar cipher.
Choose any shift value from 1 to 25 to encrypt your text.
Encrypt plain text to cipher text, or decrypt cipher text back to plain text.
The tool updates in real-time as you type or change the shift value.
The Caesar cipher is one of the simplest and most widely known encryption techniques. It's a substitution cipher where each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet. This tool allows you to both encrypt and decrypt messages using this classic method.
Use the slider to select a shift value (1-25). This determines how many places each letter is shifted.
Type your message in the "Plain Text" box. The encrypted text will appear instantly on the right.
Type the encrypted message in the "Cipher Text" box. The decrypted text will appear on the left.
Click the copy button to save the result.