Tool to decrypt/encrypt the Playfair cipher, a cipher method using a grid and a symmetrical decryption process.

Encodes and decodes the Playfair digraph cipher using a keyed square and pair-substitution rules.

This online calculator encrypts and decrypts a message given Playfair cipher keyword. Non-alphabetic symbols (digits, whitespaces, etc.) are ignored.

Simple Playfair cipher decoder for decrypting messages with known keywords. Educational tool with visual grid and step-by-step process.

5 days ago · Playfair Breaker is a simple web page that helps you break Playfair codes. The Playfair code is a simple encryption scheme frequently used in advanced crosswords.

Free online Playfair cipher encoder and decoder tool. Encrypt and decrypt text using this classic digraph substitution cipher with interactive visualization of the key table and step-by-step …

Playfair cipher online encoder and decoder. Encrypt and decrypt any cipher created in a Playfair cipher.

May 9, 2025 · Enter a keyword or phrase in the “Cipher Key” field. Click “Generate Key Matrix” to create the 5×5 grid used for encryption/decryption. In the traditional Playfair cipher, I and J …

Enter a keyword, phrase, or alphabet and the rest will be calculated for you. One letter A-Z only.

In the upper pane, you can perform encryption and decryption with a Playfair code square that is constructed from a specified key. In the lower pane, you can search for solutions to a Playfair …