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How to use Bacon Cipher

Type your text, and the tool encodes each letter as a 5-character group of a's and b's — paste a Baconian group in decode mode to convert it back.

Frequently asked questions

What is the Bacon cipher?

The Baconian cipher, devised by Francis Bacon in 1605, is a steganographic cipher that encodes each letter as a group of five characters using only two symbols (here 'a' and 'b'), like a 5-bit binary code.

Which alphabet does this tool use?

The modern 26-letter version, where every letter gets its own distinct code (A=aaaaa … Z=bbaab). The original 24-letter version merged I/J and U/V; this tool avoids that ambiguity for a perfect round-trip.

How do I decode a Bacon message?

Paste the a/b groups (spaces optional) into decode mode. Any characters that are not 'a' or 'b' are ignored, and every group of five is converted back to a letter.

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