Classic 9×9 Sudoku with a twist — dashed cages that must add up to a target sum. 4 modes, daily challenges, infinite procedurally generated levels. No account, no install, just play.
Built to feel great on any device — phone, tablet, desktop. No install needed.
Dashed groups of cells that must sum to the target. No digit repeats inside a cage — the extra constraint that makes it killer.
Earn up to 3 stars based on your solve time. Each mode has its own thresholds. Replay any level to beat your best.
Every level is procedurally generated with a fixed seed — Level 47 is always the same puzzle, so replays are fair.
Pencil mark mode for candidates, unlimited Undo/Redo, long-press to see cage remaining. Limited hints per mode.
A fresh puzzle every day with a streak tracker. Keep your streak alive and compete with yesterday's you.
All progress lives in your browser — no account needed. Resumes exactly where you left off. Light, Dark & Auto themes.
Each mode has its own track of sequential levels. Finish one to unlock the next.
Larger cages, more obvious sums, fewer constraints. Perfect for learning the rules and building confidence.
Smaller cages and trickier sum combinations. You'll need to think ahead and cross-reference rows, columns, and boxes.
Many single-cell cages as red herrings, complex cage overlaps. Pencil marks are essential. Bring your A-game.
Minimal given digits, maximum cage complexity. Only one hint available. These puzzles will destroy you beautifully.
Locked levels show a padlock + their number. Finish the previous to unlock. No skipping ahead!
No right/wrong feedback mid-solve. The grid validates only when every cell is filled — no brute-forcing.
Go back and replay completed levels to chase a better star rating or a faster time. All saves tracked locally.
Fill the 9×9 grid so every row, column, and 3×3 box contains the digits 1–9 exactly once.
Each dashed cage shows a number in the top-left corner. The digits in that cage must add up to exactly that number — with no repeats inside the cage.
Select a cell then tap 1–9 to fill it. Switch to Notes mode to pencil in candidates. Long-press any cage cell to see how much it still needs.
The puzzle only validates when every cell is filled. Use logic, not trial-and-error. Undo/Redo are always available.
Solve fast enough to earn 3 stars. Stuck? Use a Hint — but you only get a limited number per mode, so use them wisely.
Killer Sudoku is a single self-contained HTML file that runs in any browser and installs to your home screen as a PWA. No server, no account, no internet after first load — just pure puzzle joy.
At Valtuni, we believe the best tools are the simplest. Killer Sudoku delivers infinite, procedurally generated puzzles with a tight game loop: sequential levels, time-based stars, and a daily challenge to keep you coming back.
Every level is seeded — Level 47 is always the same puzzle, making replays fair and leaderboards meaningful.
All progress lives in localStorage. No account, no sync, no internet required after the first load.
Responsive layout — plays beautifully on phones, tablets, and desktops. Installable as a home screen app.
Open it in your browser right now. No download, no sign-up. Tap "Add to Home Screen" on mobile to install it like an app.