Free Playfair Cipher Encryption and Decryption Tool

Secure, in-browser cryptographic utility for Playfair cipher transformation.

Operation Mode

Keyword

Input Text

5x5 Cipher Matrix

Result

How it works

The Playfair Cipher uses a 5x5 grid of letters constructed from a keyword. Pairs of letters are encrypted by either: 1. Same row: Shift right/left. 2. Same column: Shift down/up. 3. Rectangle: Swap corners. The letter 'J' is typically replaced by 'I'.