Caesar Cipher Encoder Online
The Caesar cipher shifts every letter three places forward in the alphabet, one of the oldest known ciphers. Paste text to encode it in the classic way.
Runs in your browser — your text is never uploaded or stored.
Plain text
Encoded text
How to Use
- 1.Paste the text you want to encode.
- 2.The Caesar-shifted version appears below.
- 3.Copy the encoded text.
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FAQ
What shift value is used?
This preset uses a shift of 3, the value traditionally attributed to Julius Caesar.
Is this secure encryption?
No. The Caesar cipher is trivial to break and is only useful for puzzles and education.
Need more options?
Pig Latin & Caesar Cipher Translator
Encode and decode Caesar cipher, ROT13, Atbash and Pig Latin online. Includes a brute-force view that shows all 25 Caesar shifts at once. Runs in your browser.