CODEX

Codebook + Cipher System phrases → words → trigrams → digrams → letters
Generated default seed · 0 entries
Codebook viewer
Phrases
Words
Trigrams
Digrams
Letters
Special
The built-in codebook includes homophones; an imported book may not. This controls whether encoding picks randomly from the pool or always uses the first code
The built-in codebook includes null codes; an imported book may not. This controls whether encoding inserts them at random positions
Additive is the strongest option — with a unique random pad per message it is theoretically unbreakable. Reusing a pad across messages destroys that guarantee.
Plaintext input printable ASCII + newlines
Encrypted output
In0
chars
Out0
chars
– Phrases
– Words
– Trigrams
– Digrams
– Letters
– Nulls
– Ratio
Live encoding click Run to watch each token become a code group
Encoding map click any token or code group to highlight its match — click in the input or output textareas above to find the corresponding span here
Plaintext (input)
Encode or decode a message to see the breakdown.
Code groups (output)
phrase word trigram digram letter special null
Encoding trace run an encode to see results
Phrases
Words
Trigrams
Digrams
Letters
Special
A→Z

Disclaimer: these pages are educational demos provided as-is, with no warranty of any kind. The author is not responsible for any consequences arising from their use.

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Version 0.8.13 — Last updated: 2026-10-25

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