Sudoku Wordoku Solver: solve letter Sudoku puzzles online
This free Wordoku Solver solves 9x9 Sudoku puzzles that use letters instead of numbers. Enter the nine unique letters from your puzzle, fill in the given clues, and the solver will complete the grid using the same row, column, and 3x3 box rules as classic Sudoku.
Wordoku is also called word sudoku, letter sudoku, or alphabet sudoku. In most newspaper and printable puzzles the letters spell a hidden nine-letter word, but the logic does not depend on the word itself. Every row, column, and 3x3 box must contain all nine letters exactly once.
How to use the Wordoku solver
- Type the nine unique letters from your puzzle into the letters box.
- Click a cell and enter clues using the letter buttons or your keyboard.
- Use Solve for the full answer, or Step to reveal one safe cell at a time.
- Paste an 81-character puzzle string using letters for clues and 0 or . for blanks.
- Read the uniqueness result to see whether the puzzle has one solution or multiple solutions.
Why a dedicated Wordoku solver helps
A normal Sudoku solver expects digits 1-9. This tool maps your custom letters to Sudoku values, validates duplicate letters in rows, columns, and boxes, solves the grid internally, then converts the result back into your chosen letters. That makes it useful for newspaper Wordoku, printable Wordoku PDFs, classroom puzzles, and hidden-word Sudoku variants.
The solver is especially handy when a puzzle uses an unusual letter set. You do not need to translate letters into numbers by hand, and you can export the puzzle in a clean 81-character format if you want to save it or share it.
Tips for solving Wordoku by hand
Start by scanning for rows, columns, and boxes with many given letters. If a letter can only fit in one cell inside a box, place it. Then compare intersecting rows and columns to remove candidates. The best Wordoku puzzles can usually be solved with the same techniques as Sudoku: singles, hidden singles, pairs, box-line interactions, and careful candidate tracking.
If you get stuck, use the Step button instead of solving the whole grid. One revealed letter can show the next logical route while still letting you finish most of the puzzle yourself.
Wordoku Solver FAQ
Can I use any letters?
Yes. Use exactly nine unique letters. They do not have to form a real word.
Can I import a puzzle?
Yes. Use 81 characters read left to right, top to bottom. Use your letters for clues and 0 or dots for empty cells.
Is Wordoku solved differently from Sudoku?
No. The solving logic is the same; only the symbols change from numbers to letters.