Tap Code Translator
Convert text into the covert Tap Code, a simple grid-based cipher used famously by prisoners of war.
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How Tap Code Works
Unlike Morse code, which requires an understanding of "dots" and "dashes" (short and long signals), Tap Code requires only a single type of signal: a simple tap. It is based on a structured 5×5 Polybius square.
| 1 | 2 | 3 | 4 | 5 | |
|---|---|---|---|---|---|
| 1 | A | B | C / K | D | E |
| 2 | F | G | H | I | J |
| 3 | L | M | N | O | P |
| 4 | Q | R | S | T | U |
| 5 | V | W | X | Y | Z |
The Grid Coordinates
To communicate a letter, you first tap out the row number, pause, and then tap out the column number. Because a 5x5 grid only holds 25 letters, the letter 'K' is typically replaced by 'C'.
For example, to say "HI":
H is Row 2, Column 3 (Tap-Tap ... pause ... Tap-Tap-Tap)
I is Row 2, Column 4 (Tap-Tap ... pause ... Tap-Tap-Tap-Tap)