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Text Utilities

Caesar Cipher / Simple Encrypt-Decrypt

Shift every letter in your text by a chosen number of positions in the alphabet, the classic Caesar cipher. Enter the same shift value to decode a message back to plain text. This is a historical, educational cipher, not a secure encryption method: it offers no real security and can be broken in seconds.

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Frequently asked questions

Is this secure encryption?

No. The Caesar cipher is a simple historical substitution cipher with no real security, it can be broken almost instantly. Use it for puzzles or learning, not for protecting sensitive information.

How do I decode a message?

Enter the encoded text with the same shift value used to encode it, and select decode to reverse it back to plain text.

Does it work with numbers and punctuation?

Only letters are shifted; numbers, spaces, and punctuation are left unchanged.

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