Play Sudoku Free Online

Time0:00

Mistakes0/3

DifficultyMedium

ModePractice

Practice • Medium

Play Sudoku Free Online

This Sudoku page is a free browser puzzle for players who want a clean 9x9 grid, clear difficulty choices, and no account wall. You can fill cells, track progress, and restart instantly without installing an app.

The remade board adds unique-solution generation, notes-first tools, teaching hints, strict or relaxed mistakes, practice and daily modes, and a mobile number dock. Use it for a short reset or a longer logic session on laptop, phone, or Chromebook.

Sudoku Strategy Basics

Start with singles: Scan rows, columns, and boxes for cells that have only one legal number left. Easy boards often open completely from repeated single-candidate passes.

Pencil in candidates early on harder grids: Once the obvious singles dry up, notes stop you from guessing. Guessing is the fastest way to create a fake “stuck” board.

Use box-line elimination: If a number can only appear in one row inside a box, remove that number from the rest of the row outside the box.

Never force a cell just to feel progress: A wrong placement can poison the whole grid. If two candidates still look equal, keep scanning elsewhere first.

Warm up on easier boards: Speed and confidence come from clean technique, not from jumping straight into expert mode and erasing constantly.

Use teaching hints before fills: Hints highlight naked singles and hidden singles first, so you learn the reason before the number is placed.

Sudoku FAQ

Is this Sudoku free?

Yes. You can play full Sudoku puzzles in the browser with no signup and no download.

Does it work on phones?

Yes. Tap a cell, use the number dock, switch notes mode when needed, and follow the same logic flow as desktop.

What difficulty should beginners choose?

Start on Easy or Medium until you can clear boards without guessing. Move up only when singles and basic elimination feel automatic.

Are the puzzles unique-solution?

Yes. Boards are generated to keep a single valid solution across the difficulty range.

Can I track wins and best times?

Yes. Local stats and achievements on this page keep progress history in your browser on the same device.

What should I play after Sudoku?

If you like pure logic, try Minesweeper or 2048 next. If you want word logic instead of numbers, jump into Wordle.

Keep the thinking pace going with nearby puzzle pages from the same site.

Minesweeper 2048 Wordle Chinese Chess Puzzle Games HTML5 Unblocked Hub