🧩 Sudoku
A classic logic puzzle. Three difficulties, notes mode, error checking. Plays entirely in your browser — your puzzle never leaves your device.
SUDOKU
00:00 · MEDIUM
Press N to toggle notes · 1–9 to fill · Backspace to erase
🧠 Love brain teasers? Browse puzzle books, brain-training programs, and logic games.
Browse →
Puzzle generation runs entirely in your browser. Nothing is sent to any server, no cookies, no tracking.