Free daily
Free Daily Sudoku
Two fresh sudoku puzzles every day -- a full 9x9 and a quick 4x4 mini. Large print, browser-based, with undo and note-taking built in.
Features
Built for serious puzzlers
Undo anytime
Made a mistake? Hit Undo (or Cmd+Z) to step back through your last 50 moves.
Pencil notes
Switch to pencil mode to jot candidate numbers in any cell without committing.
Progress saved
Close the tab and pick up exactly where you left off. No account needed.
Two sizes
The 9x9 classic for a full challenge. The 4x4 mini when you want a quick win.
Large print
Big cells, clear numbers. Designed for comfort whether you're on desktop or tablet.
Daily streak
Sign in to track your solving streak and earn achievements as you improve.
FAQ
Common questions
What difficulty levels are available?
The daily Sudoku is graded at a comfortable medium difficulty. The public date index covers every published day, and the members-only archive includes Easy, Medium, Hard, and Expert replays across hundreds of past dates.
Can I use pencil marks?
Yes. Tap the pencil icon to switch to pencil-mark mode and jot candidate numbers into any cell. Tap again to switch back to normal entry mode.
What is mini sudoku?
Mini Sudoku is a smaller 4×4 or 6×6 grid: same rules as standard Sudoku, quicker to solve. It appears as a separate tab on the daily puzzle page alongside the full 9×9.
Is there a timer?
Yes, a timer starts from your first move. Your solve time is displayed when you complete the puzzle. Try to beat it on future days.
Is sudoku good for your brain?
Yes. Sudoku exercises logical reasoning, concentration, and working memory. Studies suggest that regular mental challenges like number puzzles can help maintain cognitive sharpness over time. Because sudoku relies on pure logic rather than maths, it's accessible to everyone and delivers a genuine mental workout regardless of arithmetic skill.
What is a good sudoku strategy for beginners?
Start by scanning for rows, columns, or boxes that are nearly complete, giving you the most constrained cells, so the missing number is easiest to find. When a number can only go in one place within a row, column, or 3×3 box, place it immediately. Use pencil marks to jot possible candidates in empty cells, then eliminate them as you fill in confirmed numbers nearby.
Today's sudoku is live
A fresh 9x9 and mini go live at midnight GMT every day. The public archive indexes each date, and full replay stays in the members-only archive.
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