Text Encryption / Decryption
Encrypt and decrypt text using classical ciphers: Caesar, ROT13, Vigenere, and Atbash. See the cipher alphabet and learn how each method works.
Khoor, Zruog! Wklv lv d vhfuhw phvvdjh.
Cipher Alphabet
A↓D
B↓E
C↓F
D↓G
E↓H
F↓I
G↓J
H↓K
I↓L
J↓M
K↓N
L↓O
M↓P
N↓Q
O↓R
P↓S
Q↓T
R↓U
S↓V
T↓W
U↓X
V↓Y
W↓Z
X↓A
Y↓B
Z↓C
Caesar Cipher
One of the oldest known ciphers. Each letter is shifted a fixed number of positions in the alphabet. Named after Julius Caesar, who reportedly used a shift of 3 to communicate with his generals.
All encryption/decryption happens locally in your browser. These are classical ciphers for educational purposes and should not be used for real security.
How This Tool Was Built
This tool was created entirely by AI. Here's the exact prompt used to generate it:
Prompt Used
Create a Text Encryption / Decryption tool with Caesar cipher (adjustable shift), ROT13, Vigenere cipher (keyword input), and Atbash cipher tabs. Show cipher alphabet mapping, encrypt/decrypt toggle, copy and swap buttons.
Claude AI Model
9,200 Tokens Used
AI-Generated Code Origin