Encode and decode Caesar shift ciphers with an adjustable shift. Live output preserves case and punctuation, ROT13 is one click away, and a brute-force panel cracks unknown ciphers by showing all 25 shifts — all entirely in your browser.
Not sure which shift was used? Enter the ciphertext above, then press below to decode it with every possible shift. Scan the list for the row that reads as plain language.