Tap Code Encoder/Decoder

Encode and decode text using the Polybius square tap code cipher

All processing happens in your browser. No data is uploaded.

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Tap Code

Encode and decode text using tap code, a Polybius square cipher variant historically used by prisoners to communicate through walls.

🔒All processing happens in your browser. No data is uploaded.

Encode

Decode

Text Input

Enter text to encode (letters and spaces)...

Tap Code Output

Result will appear here

Tap Code Grid (Polybius Square)

	.	..	...	....	.....
.	A	B	C	D	E
..	F	G	H	I	J
...	L	M	N	O	P
....	Q	R	S	T	U
.....	V	W	X	Y	Z

Note: The letter K is replaced by C in the traditional tap code grid.

Format

Encoding format: