Sudoku.com

Sudoku.com puts a numbered grid at center stage, then fans outward into Classic and Killer modes, daily archives, tutorials, printables, and a solver. The familiar tools are here—notes, erase, undo, and hints—but the free page also advertises its ad support and counts three mistakes before game over.

What is Sudoku.com?

The landing page behaves like a crowded digital puzzle book whose first page is already open. Pick a difficulty from Easy through Extreme, work the 9-by-9 grid, and lean on pencil-style notes or an explanatory hint when the candidates get tangled. A timer and mistake counter keep the session game-like, while the navigation points toward Killer Sudoku, themed postcard and storybook modes, rules, printable boards, and a dated challenge archive. That breadth makes the site useful for both a quick coffee-break grid and a longer tour through Sudoku variations, though not every extra needs to join the table at once.

What you can do there

• Fill a 9-by-9 Sudoku grid
• Choose a mode and difficulty
• Open a dated daily challenge

Why we picked it

The appeal is less novelty than range with a low learning curve: a recognizable Sudoku board sits one click away from six difficulty levels, teaching material, and a calendar of daily puzzles. The notes-and-hints toolkit gives beginners somewhere to start, while tougher tiers leave room for regular solvers to settle in.

How to get the most from it

Start on Easy or Medium and use Notes to park candidates without committing them. Check the mistake counter before treating guesses casually, and open the Rules section for technique lessons when a hint would solve the cell without teaching the pattern. The Daily Challenges archive is the better route when a dated puzzle and trophy trail sound more inviting than a random new grid.

Good to know

The game is presented as free, and the page says advertising helps fund it; its cookie disclosure also names analytics and advertising technologies. Three recorded mistakes trigger game over, with a second-chance option shown in the interface. Sound, accessibility, popup frequency, browser support, and live progress persistence were not verified, so those details deserve a quick personal check before a long streak.

Who made it, and when?

Easybrain is the credited creator or organization. The earliest supported launch date we found is August 23, 2018.