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Tap Code Cipher

Send letters as row-and-column tap groups using the classic 5x5 tap code square.

Learn how Tap Code works

Input

Output

Using This Tool: Guide & Notes Show guide

Tap Code represents each letter as two tap counts: one for the row and one for the column.

How to use it

  • Choose Encode to convert text to taps, or Decode to convert tap groups back to text.
  • Paste the message or tap sequence into the input box.
  • Check the square to confirm the row and column for each letter.
  • Use clear separators between tap groups when decoding.

Options and settings

  • Tap symbols control how each tap is written in the output.
  • Group separators make rows, columns, letters, and words distinguishable.
  • Square settings decide how letters fit into the 5x5 grid.
  • Formatting choices affect readability more than the underlying mapping.

Notes

  • Traditional Tap Code often combines C and K.
  • Decoding fails quickly if row and column groups are not separated clearly.
See all tools
Polybius Square Cipher Encode letters as row-and-column coordinates using the classic 5x5 Polybius square. Bifid Cipher Mix Polybius square coordinates in fixed-size blocks to create a fractionating classical cipher. Nihilist Cipher Encrypt or decrypt numeric Nihilist ciphertext with a keyed Polybius square and repeated additive key. ADFGX Cipher Use a keyed ADFGX square followed by keyed columnar transposition.
Related Article

Tap Code Cipher: When Letters Became Knocks

How a 5×5 square turned the alphabet into row-and-column tap groups, and made communication possible through walls, pipes, floors, and silence.

Read the article
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A note from the team

We build these tools because we love cryptography, encoding, and making difficult ideas easier to explore. If they've helped you, even a small coffee means the world to the project. Thank you!

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