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Substitution Cipher Tool | Encode & Decode with Custom Keys

Encode and decode messages using substitution ciphers with keyword, shift, or custom alphabet keys. See the full cipher alphabet mapping.

Encoded Text

DTIIL WLOIR

Using SECRET substitution

Original Text

HELLO WORLD

Cipher Alphabet

SECRTABDFGHIJKLMNOPQUVWXYZ

Standard Alphabet

ABCDEFGHIJKLMNOPQRSTUVWXYZ

Key Used

SECRET

Characters Processed

10.00

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