🕵️ Secret code maker for kids
Encode and decode secret messages with the Caesar cipher, Atbash, number codes, Morse code and backwards writing. Print the message with its code key.
Secret message
Phhw ph dw wkh wuhh krxvh
Code key: Caesar shift, shift 3
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
A
B
C
Questions and answers
Frequently asked questions
What is the Caesar cipher?
Every letter moves a fixed number of places along the alphabet. With a shift of 3, A becomes D, B becomes E and so on. Julius Caesar is said to have used it for his letters.
How do I decode a message?
Choose the same code (and the same shift, for Caesar), switch to "Decode" and paste the secret message.
How do I write numbers and Morse code?
For letters to numbers, separate letters with dashes and words with a slash: 8-9 / 13-15-13. For Morse, separate letters with spaces and words with a slash.
How can I use it in a treasure hunt?
Print a coded clue with the key on the page, or keep the key hidden somewhere else as an extra challenge.
Explore more: scavenger hunt maker, and riddles.