Zodiac web toy

Get our your decoder rings and try out my Zodiac cipher web toy. Crack the code; become instantly famous!

Click the scribblings to try to outsmart the killer.

This cipher is one of the famous unsolved ciphers that the Zodiac serial killer sent to newspapers back in the late 1960s / early 1970s to taunt people about his killings. His first cipher was solved a long time ago. But he sent another cipher, which remains unsolved to this day. Many cryptography experts have tried and failed, which has led to speculation that the cipher is a hoax sent to frustrate and delay detectives working the case. But there are claims that by using statistical analysis, you can tell that the cipher does indeed contain a message (I don’t recall exactly how).

Go break the code!

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