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Playfair Cipher

Work with digraph encryption using a 5×5 Playfair matrix.

Classical Ciphers
Input

Playfair Cipher

Encrypt or decrypt digraphs with a 5×5 Playfair matrix built from your key.

  • J is merged into I by the algorithm.
  • Repeated letters in a pair are split with X during encoding.
  • The matrix is returned so you can verify the key layout.
Status
Waiting for input
Output

Playfair result

Review the transformed text and copy the output you want to keep.

Output preview

The transformed digraph output and the generated Playfair matrix will appear here.