Verified no-login tool
Type, shift, copy.
Type your message into the input box.
Pick a shift and mode — encode, decode or brute force.
Read the result — brute force shows all 25 shifts at once.
Copy the encoded or decoded text.
Built for speed, privacy and reliability — on any device.
Shift letters forward to encode, backward to decode — one dropdown.
See all 25 possible shifts at once — crack any Caesar message instantly.
Upper and lower case letters keep their positions; digits and punctuation untouched.
Everything runs locally — your text never leaves the browser.
No account, no limits.
One of the oldest ciphers — each letter is shifted a fixed number of positions through the alphabet. Julius Caesar used a shift of 3.
Use brute-force mode — all 25 shifts are shown at once, and the readable one is your answer.
Not for real secrets — it is broken instantly by brute force. It is for learning, puzzles and games.
No. Everything runs entirely in your browser.
The tool works in all modern browsers including Google Chrome, Mozilla Firefox, Microsoft Edge, Safari and Opera. We recommend keeping your browser up to date for the best experience.
Encode, decode and brute-force any shift