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Playfair–Wheatstone · 6×6

Keyword
Plaintext
6×6 Keyword Grid
Digrams
Enter text to see digrams…
Encoded Text
Enter plaintext to encode
Password to Enter
—
✕
At least 8 characters
✕
At least 1 uppercase letter
✕
At least 1 lowercase letter
✕
At least 1 number
✕
At least 1 special character (!)

A–Z and 0–9 only · spaces & punctuation removed · repeated letters in a pair get X inserted · odd final character padded with X

Keyword
Ciphertext
6×6 Keyword Grid
Ciphertext Digrams
Enter ciphertext to see digrams…
Decoded Text
Enter ciphertext to decode

Decoded output preserves any filler X values added during encryption for repeated letters or odd-length text.

A–Z and 0–9 only · ciphertext read in sequential digrams.