Substitution Cipher
Encrypt and decrypt text using a custom alphabet substitution cipher. Define your own 26-letter substitution alphabet to create a monoalphabetic cipher for encoding messages.
How to Use Substitution Cipher
Enter or modify the 26-letter substitution alphabet, type your message, select encrypt or decrypt mode, and click the button to transform your text using the monoalphabetic substitution cipher.
Step-by-Step Instructions
- Define your 26-letter substitution alphabet
- Enter the text to encrypt or decrypt
- Select Encrypt or Decrypt mode
- Click the button and copy the result
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