Tap Code Cipher
Encode text as Polybius-grid taps.
Output
.. ... / . ..... / ... . / ... . / ... .... ..... .. / ... .... / .... .. / ... . / . ....
Tap code grid (C and K share a cell)
| 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 |
Tap code uses a Polybius-style 5×5 grid. Each letter is encoded as row taps, pause, column taps. Used by US prisoners of war in Vietnam to communicate through cell walls. C and K share one cell. Pause between words is shown as a double space.
About
Tap code uses a Polybius 5x5 grid. Each letter encodes as row taps, pause, column taps. Famously used by US POWs in Vietnam to communicate through cell walls. C and K share one cell.
How to use
- Pick encode or decode.
- Type your text or taps.
FAQ
How do I tap it?+
Row taps, short pause, column taps, longer pause for the next letter. Listen for the rhythm. The letter K is sent as C.