Pigpen Cipher
Encrypt with the classic pigpen substitution cipher.
Pigpen output
Decoder key
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
The pigpen cipher uses two 3x3 grids and two X shapes. A through I sit in the first grid, J through R in the second grid (with a dot), S through V in the first X, W through Z in the second X (with a dot). Each letter becomes the lines surrounding its cell.
About
Pigpen replaces letters with symbols based on a tic-tac-toe and X grid. Used by Freemasons in the 1700s and grade-school spies ever since. Outputs both as symbols (rendered) and as a key reference.
How to use
- Type plaintext.
- See the pigpen symbols.
- Save as image or copy the key.
FAQ
Is pigpen secure?+
No. It's a one-to-one substitution. Anyone with the key reads it instantly. Useful for puzzles and historical interest.