Caesar brute force
Crack a Caesar cipher by showing all 25 possible shifts at once.
Caesar brute force
Paste ciphertext you suspect was encoded with a Caesar shift — also known as ROT-N — and this tool applies all 25 possible shifts at once, so you can scan the list and spot the one that reads as plain text. There is no key to guess and nothing to configure first: since a Caesar cipher only has 25 non-trivial shifts, trying every one of them is faster than reasoning about which shift was used.
This is the standard first move against a Caesar or ROT cipher in puzzle hunts, escape rooms and beginner cryptography exercises: instead of decoding by hand letter by letter, you get every candidate plaintext side by side and your eye does the rest, since real language jumps out immediately among 24 lines of gibberish. It's also handy for CTF challenges and old-school forum obfuscation, where short messages were "encrypted" with a fixed shift and the only practical attack is exhaustive search rather than frequency analysis.
Each of the 25 lines is labelled with its shift number so you can note which one worked, or turn that off if you just want the raw candidates to skim. Numbers pad to two digits by default so the list stays aligned as you scan down it. Only the 26 unaccented Latin letters A–Z are shifted; digits, punctuation, spaces, accented characters and other scripts are copied through untouched in every line, exactly as a Caesar cipher is defined to behave — so mixed-language or formatted text still decodes correctly wherever the cipher applies.
Everything runs locally in your browser. The ciphertext you paste is never uploaded anywhere, which matters if you're working through a private puzzle, a CTF flag, or text you don't want to hand to a third-party service just to try 25 shifts.