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
Complete Guide

How the Atbash Cipher Works

Master the ancient art of Hebrew encryption with our step-by-step guide

Understanding Atbash

What is Atbash?

The Atbash cipher is a substitution cipher where each letter is replaced with its mirror letter from the reversed alphabet. It's like folding the alphabet in half and matching letters from opposite ends.

Why "Atbash"?

The name comes from Hebrew: Aleph-Taw-Beth-Shin. These are the first, last, second, and second-to-last letters of the Hebrew alphabet.

The Alphabet Mapping

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
Key Insight

The Atbash cipher is its own inverse! This means applying it twice returns the original text. Encoding and decoding use the exact same process.

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.

Privacy Focused

All processing happens in your browser. Your text never leaves your device, ensuring complete privacy and security.

Frequently Asked Questions

Atbash Cipher FAQ

Common questions about the Atbash cipher and our tool

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). This naming convention itself demonstrates how the cipher works!

Explore More

Other Cipher Tools

Discover more classical ciphers and encoding tools

Caesar Cipher

Shift cipher

Try Tool

Vigenère Cipher

Polyalphabetic

Try Tool

Base64 Encoder

Modern encoding

Try Tool

Morse Code

Telegraph code

Try Tool
View All Tools

Ready to Explore the Ancient World of Cryptography?

Join thousands of users who have discovered the fascinating history of the Atbash cipher

Start Encoding NowTry Other Languages