Caesar Cipher
// Encrypt and decrypt text with a configurable shift
#About Caesar Cipher
Free online Caesar cipher tool. Encrypt or decrypt text by shifting letters through the alphabet with a configurable offset. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
#FAQ
What is the Caesar cipher? ▾
The Caesar cipher is one of the oldest encryption techniques. It shifts each letter in the text by a fixed number of positions in the alphabet. ROT13 is a special case with a shift of 13.
Is the Caesar cipher secure? ▾
No. With only 25 possible shifts it can be broken trivially by trying all possibilities (brute force). It is useful for learning about ciphers but not for real security.
</> Embed this tool ▾
Copy this code to embed the tool on your website. Adjust the height to fit your layout.
<iframe src="https://www.browserutils.dev/embed/caesar-cipher" width="100%" height="500" frameborder="0" title="Caesar Cipher"></iframe>