Atbash Cipher — Encode & Decode
Encode and decode text using the Atbash cipher. Each letter is replaced by its mirror in the alphabet (A↔Z, B↔Y). Supports both Latin and Cyrillic alphabets.
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Atbash Mapping
Latin
AZ
BY
CX
DW
EV
FU
GT
HS
IR
JQ
KP
LO
MN
NM
OL
PK
QJ
RI
SH
TG
UF
VE
WD
XC
YB
ZA
Cyrillic
АЯ
БЮ
ВЭ
ГЬ
ДЫ
ЕЪ
ЁЩ
ЖШ
ЗЧ
ИЦ
ЙХ
КФ
ЛУ
МТ
НС
ОР
ПП
РО
СН
ТМ
УЛ
ФК
ХЙ
ЦИ
ЧЗ
ШЖ
ЩЁ
ЪЕ
ЫД
ЬГ
ЭВ
ЮБ
ЯА
How to Use the Atbash Cipher — Encode & Decode
- Enter or paste your text in the input field.
- The encoded or decoded result appears automatically.
- Copy the output using the copy button.
- Switch between encode and decode modes if available.
Referencia Rápida
| De | A |
|---|---|
| A | 65 (ASCII) |
| Z | 90 (ASCII) |
| a | 97 (ASCII) |
| 0 | 48 (ASCII) |
| Space | 32 (ASCII) |
| @ | 64 (ASCII) |
Casos de Uso
- •Encoding or decoding data for web development projects.
- •Learning about cryptography and different cipher techniques.
- •Preparing encoded content for APIs or data transmission.
- •Solving cipher puzzles, CTF challenges, or educational exercises.
Fórmula
The Atbash cipher maps each letter to its reverse position in the alphabet. For Latin: A↔Z, B↔Y … For Cyrillic: А↔Я, Б↔Ю …
Preguntas Frecuentes
What is the Atbash cipher?
Atbash is a simple substitution cipher where each letter is replaced by the letter in the mirror position of the same alphabet. In Latin: A maps to Z, B to Y, and so on. It was originally used with the Hebrew alphabet.
Is Atbash encoding the same as decoding?
Yes — Atbash is its own inverse. Applying the cipher twice returns the original text, so the same operation works for both encoding and decoding.
Does this tool support Cyrillic?
Yes. The Atbash substitution is applied independently to the Latin alphabet (26 letters) and the Cyrillic alphabet (33 letters). Other characters such as digits and punctuation are left unchanged.
How secure is the Atbash cipher?
The Atbash cipher has essentially zero security. Because there is only one possible key (the reversed alphabet), any ciphertext can be immediately decoded without any key knowledge. It is used for puzzles and historical study.
What is the history of Atbash?
Atbash comes from ancient Hebrew cryptography. The name reflects the substitution pattern: Aleph (first letter) ↔ Tav (last), Bet ↔ Shin. Examples appear in the biblical Book of Jeremiah.