# Caesar Cipher Shift letters by any amount to encode or decode a Caesar cipher — with a one-click brute-force view that shows all 26 possible shifts to crack an unknown message. 100% in your browser. ### How it works The Caesar cipher shifts every letter a fixed number of places through the alphabet — a shift of 13 is the special case known as [ROT13](rot13.html). Decoding is just shifting the other way. Because there are only 25 possible keys, it offers no real security: the **brute-force view** shows all 26 shifts at once so you can read an intercepted message instantly. --- *Source: [ocxly.com/caesar-cipher.html](https://ocxly.com/caesar-cipher.html) — OCXLY, free 100% client-side privacy-first tools. Free Caesar cipher encoder and decoder with an all-26-shifts brute-force view to crack unknown messages. Runs entirely in your browser — no uploads, no tracking.*