Tools / ROT Cipher
ROT / Caesar Cipher Decoder
Paste any ROT-encoded or Caesar-shifted ciphertext, drag the slider to the correct shift, or click Try all 26 shifts to scan every rotation at once. Letters shift; digits, punctuation, and spaces are preserved.
ROT18
Decoded output
picoCTF{r0tat1on_d3crypt3d_7d140864}
How it works
A Caesar cipher shifts every letter in the alphabet by a fixed amount. ROT13 is the most common variant (shift of 13) because applying it twice returns the original text. The flag format picoCTF{…} tells you when you have the right shift — the decoded output must begin with those characters.
Challenges solved with this tool: picoCTF 2023 — Rotation, Ready Gladiator 0, Ready Gladiator 1, Ready Gladiator 2.