Sudoku Generator & Solver
Unique-solution puzzles at five difficulties, with pencil marks, hints and validation.
Pick a difficulty and generate a puzzle.
About this tool
The generator fills a complete grid with randomised backtracking, then removes clues one by one and keeps a removal only when a solution counter confirms the puzzle still has exactly one solution — so every puzzle here is unique. The difficulty rating is based on the number of remaining clues and on which solving techniques (naked singles, hidden singles, locked candidates or full backtracking) the puzzle actually requires. Generation, solving and PNG export all happen in your browser; nothing is uploaded.
- 100% free — no account needed
- Runs in your browser
- Nothing is uploaded
Frequently asked questions
Is Sudoku Generator & Solver really free?
Yes. Sudoku Generator & Solver is completely free on PureBrowser — every feature, with no account, no trial, and no credit card.
Does Sudoku Generator & Solver upload my data?
No. Sudoku Generator & Solver runs entirely inside your browser, so anything you type, paste, or open stays on your own device.
Do I need to sign up or install anything?
Neither. There is no account and nothing to download — open the page and Sudoku Generator & Solver is ready to use on desktop or mobile.
Does Sudoku Generator & Solver work offline?
Once the page has loaded, yes. All of the processing happens locally in your browser, so it keeps working without a connection.
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