Bacon Cipher (A/B Binary Code)
Security ToolsHide letters as 5-letter A/B groups
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All history →Bacon Cipher (A/B Binary Code) — at a glance
Change each letter into a five-symbol A/B code, or decode one.
How to use it — step by step
Text to encode, or groups of five A/B (or 0/1) symbols to decode.
Add your text
Paste or type your input into the box. The Sample button fills in an example.
Choose the options
Pick the mode and settings you need. Results update when you run the tool again.
Press Run
The result is made instantly inside your browser.
Copy the result
Use the Copy button, or send it to another tool.
Pro tips
Small things that make the result better.
Quick facts
Frequently Asked Questions
What is Bacon’s cipher?+
A method by Francis Bacon that writes each letter as five symbols made of two characters, A and B.
Is it the same as binary?+
Almost: A is 0 and B is 1, and each letter is its position 0–25 written in 5 bits.
Is my data safe?+
Yes. Everything runs inside your own browser. Your text, files and images are never uploaded to any server.
Is this tool really free?+
Yes — completely free, no signup, no watermark and no usage limit.