Atbash Cipher - Ancient Encryption Tool
Ancient Hebrew Cipher

Atbash Cipher Tool

Encode and decode text using the ancient Hebrew substitution cipher. Fast, secure, and completely free to use.

The Atbash cipher is one of the oldest known encryption methods, used in biblical texts to hide sensitive information. Now available as a modern, easy-to-use online tool.

Real-time

Instant conversion as you type

Secure

All processing happens locally

Ancient

Used in biblical manuscripts

Universal

Works with any alphabet

Quick Example

HELLO→SVOOL

Each letter is replaced with its mirror position in the alphabet

Online Atbash Cipher Tool

Use our free online converter to encode and decode text with the ancient Atbash substitution cipher.

Atbash Cipher Converter
Enter text to encode or decode using the ancient Atbash substitution cipher. The conversion works both ways - plain text becomes cipher text and vice versa.
Characters: 0Letters: 0Words: 0
Atbash Alphabet Mapping
Each letter is replaced with its mirror position in the alphabet
A
↓
Z
B
↓
Y
C
↓
X
D
↓
W
E
↓
V
F
↓
U
G
↓
T
H
↓
S
I
↓
R
J
↓
Q
K
↓
P
L
↓
O
M
↓
N
N
↓
M
O
↓
L
P
↓
K
Q
↓
J
R
↓
I
S
↓
H
T
↓
G
U
↓
F
V
↓
E
W
↓
D
X
↓
C
Y
↓
B
Z
↓
A

Why Use Our Atbash Cipher Tool?

Educational Value

Learn about one of history's oldest encryption methods. Perfect for students, researchers, and cryptography enthusiasts.

Historical Significance

Explore the same cipher used in ancient Hebrew manuscripts and biblical texts to conceal important information.

Easy to Use

No registration required. Simply type your text and get instant results. Works on all devices and browsers.

Did You Know?

The word "Atbash" comes from the first, last, second, and second-to-last letters of the Hebrew alphabet: Aleph-Taw-Beth-Shin (אתבש).

Atbash Cipher Tool

Free online tool for encoding and decoding text using the ancient Atbash cipher.

AboutHow It WorksFAQPrivacy Policy

© 2025 Atbash Cipher Tool. Free to use for educational and personal purposes.