Sudoku
Play Sudoku in your browser — generate a fresh puzzle at three difficulties, fill it in, and reveal the answer. Free, no sign-up.
Report a problemHow to use
- Pick a difficulty and press New puzzle — every puzzle has exactly one solution.
- Tap a square and type 1–9 (or use your number keys). The bold numbers are the given clues; your entries are green, and any clash turns orange.
- Stuck? Press Show answer to reveal the full solution, or Clear my entries to start the same puzzle again.
FAQ
Are the puzzles always solvable?
Yes. Each puzzle is generated from a complete solution, then clues are removed only while exactly one solution remains — so every puzzle has a single, logical answer with no guessing required.
How do the difficulties differ?
They change how many clues you start with: Easy gives the most numbers, Hard gives the fewest. Fewer clues means more deductions to find the answer.
Is anything uploaded?
No. The puzzle is generated and checked entirely in your browser, so nothing leaves your device. It works offline.