How it works
- 1Choose a difficulty and generate a puzzle.
- 2Fill cells with the keyboard or number pad; use Hint or Check when needed.
- 3Solve, print or copy a share link for the exact puzzle.
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BROWSER · Toolardo Original Puzzle Engine · Vanilla JavaScript
Sudoku Generator, Player & Solver
Generate unique Sudoku puzzles, play with timer and hints, check answers, solve, print or share. Runs locally in your browser.
✓ Generate a fresh Sudoku locally with four difficulty levels✓ Uniqueness check keeps generated puzzles to a single solution✓ Play with timer, best time, hints, validation and on-screen number pad
Ready.00:00 · Best —
Every puzzle is generated locally in your browser and checked for a single solution.
Original Toolardo implementation. No third-party puzzle library or external runtime is used.
About this tool
A local browser Sudoku generator, player and solver with unique-solution checking.
Common uses
sudoku generatorsudoku solverplay sudokuprintable sudoku
Frequently asked questions
Does each generated Sudoku have one solution?
The generator removes clues only when the puzzle still has exactly one solution.
Is the puzzle uploaded?
No. Generation, solving, timing and validation happen in your browser.
Does Toolardo use an external Sudoku library?
No. This tool uses Toolardo’s own JavaScript implementation.