Bacon's Cipher
Encode text using Bacon's bilateral cipher (each letter → 5-char A/B or 0/1 sequence) and decode back to letters.
Variant:
AABBB AABAA ABABA ABABA ABBAB / BABAA ABBAB BAAAA ABABA AAABB
Reference table (A–Z)
A
AAAAA
B
AAAAB
C
AAABA
D
AAABB
E
AABAA
F
AABAB
G
AABBA
H
AABBB
I
ABAAA
K
ABAAB
L
ABABA
M
ABABB
N
ABBAA
O
ABBAB
P
ABBBA
Q
ABBBB
R
BAAAA
S
BAAAB
T
BAABA
U
BAABB
W
BABAA
X
BABAB
Y
BABBA
Z
BABBB
I/J and U/V share the same code in the original Bacon cipher.
What is Bacon's cipher?
Developed by Sir Francis Bacon in the early 1600s, the bilateral cipher encodes each letter as a 5-character sequence of two symbols (originally typeface variations — bold/plain — disguised in steganographic text). Today it's commonly written using A/B or 0/1. This tool uses the original 24-letter alphabet where I=J and U=V.
Private & free — this tool runs entirely in your browser.
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