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Pigpen Cipher

Convert text to pigpen symbols and back, with the full symbol table, dotted cells and the tic-tac-toe variant for the last four letters.

Pigpen cipher encoder and decoder

Result: —
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Symbol for every letter
Nine shapes come from a plain grid, nine from the same grid with a dot, four from an X grid and the last four from a dotted X grid, which is the tic-tac-toe variant.

How to use the Pigpen Cipher

  1. Choose whether you are encoding text or decoding symbols.
  2. Type the letters, or paste the pigpen symbols you were given.
  3. Check the symbol table, then copy the converted result.

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Frequently Asked Questions

Common questions about the free online pigpen cipher.

It replaces each letter with a fragment of a grid, and the shape of that fragment shows which cell the letter occupies.
Twenty six. Nine come from a plain grid, nine from a dotted grid and the last eight from an X shaped grid.
A dotted cell is written with a bullet after the shape, so the letter N appears as a small square with a dot inside.
The last four letters use a grid drawn with two diagonals, which creates four triangle cells instead of nine squares.
Yes. The decoder reads the symbols one by one, so pasted text works with or without spaces between the shapes.
No. Only the letters A to Z are converted. Other characters are skipped and the skipped count is reported.
No. It is a simple substitution cipher that falls to frequency analysis, so it is used for puzzles and games.
No. The symbol table and the conversion both live in the page, so your text is never uploaded anywhere.

Last updated: October 10, 2026