About the Playfair Cipher
The Playfair Cipher is a classical encryption technique that encrypts pairs of letters (digraphs) using a 5×5 matrix built from a keyword. It’s more secure than simple substitution ciphers because it hides frequency patterns better. Use the tool below to generate a matrix, then encrypt or decrypt text interactively.
Playfair Cipher Tool
Result:
Your encrypted/decrypted text will appear here...