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Codeword Number Decoder
Codeword puzzles replace every letter with a number. Enter the number grid and any letters you've already cracked — PuzzleNest decodes the rest and suggests which numbers to try next based on letter frequency.
Your Puzzle
Paste the numbers exactly as they appear in the puzzle grid, row by row.
Enter the letters you've already worked out, separated by commas.
Decoded Result & Suggestions
Paste your grid and known letters, then hit Decode.
How It Works
Crack Any Codeword in 3 Steps
1️⃣
Enter the Numbers
Type or paste the number grid from your puzzle.
2️⃣
Add Known Letters
Give it any number-letter pairs you've already solved.
3️⃣
Decode & Suggest
See the grid decoded plus which unsolved numbers appear most — likely common letters.
⚡
Instant & Free
No sign-up, works on any device, right in your browser.
Questions
Codeword Solver FAQ
What is a Codeword puzzle? +
A Codeword (or Codebreaker) is a crossword-style grid where every square holds a number instead of a letter, and each number always maps to the same letter throughout the puzzle.
How do I find my starting letters? +
Look for the most frequent numbers in your grid — in English they're very likely to be common letters like E, A, T, O, I, N. The solver ranks unsolved numbers by frequency to help.
Can it solve the whole puzzle for me? +
It decodes every number you've already mapped and highlights the most useful unsolved numbers to focus on next, speeding up manual solving significantly.
Keep Solving