Caesar Cipher
Encrypt or decrypt text by shifting letters through the alphabet.
Cryptography
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How to use Caesar Cipher
Choose Encrypt or Decrypt mode.
Set a shift value (e.g. 3).
Type or paste your text in the input box.
Copy the output result.
Frequently Asked Questions
Is Caesar Cipher secure?
No. It is a historical cipher and is easy to break. It’s useful for learning, not real security.
What characters are encrypted?
Only letters A–Z are shifted. Numbers, spaces, and punctuation are preserved.
How do I decrypt?
Switch to Decrypt mode and use the same shift value used to encrypt.
Why use Kitbase Caesar Cipher?
Instant results
Outputs update as you type with no server calls.
Case-preserving
Uppercase and lowercase letters stay consistent.
Demo included
Load an example to understand how the shift works.
Privacy-first
Everything runs locally in your browser.