SecurityBeta
Caesar Cipher
Shift letters forward or backward through the alphabet for quick classical ciphers.
Letters rotate A-Z. Numbers, punctuation, spaces, and accents stay unchanged.
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Frequently Asked Questions
Is Caesar cipher secure for real secrets?
No. Caesar cipher is a historical learning and puzzle cipher. Use Symmetric Encryption for real confidential text.
What characters are shifted?
Only English A-Z and a-z letters are shifted. Case is preserved, while numbers, punctuation, whitespace, and accented characters are left unchanged.
How do I decode a message?
Switch to Decode and use the same shift value that was used to encode the original message.