Free Sudoku Game Online
Free Sudoku Game Online is a free online tool by US AI. Generator + solver. It runs completely in your browser — no signup, no download, works on mobile and desktop.
📖 How to use
- Pick a difficulty, fill the grid with the number pad, then Check your answer or let Solve finish it.
- Open the tool with the button above — it loads instantly.
- Your work stays on your device; nothing is uploaded anywhere.
✨ Why use this tool?
US AI's free sudoku game online is fast, private and 100% free forever. Bookmark this page and share it with anyone who needs it.
❓ Frequently asked questions
Is the Sudoku game free?
Yes, 100% free forever. No signup, no download — unlimited puzzles right in your browser.
What difficulty levels are available?
Four levels: Easy, Medium, Hard and Expert. Start easy and work your way up as you improve.
Does it work on my phone?
Yes, it works on mobile and desktop browsers. Tap a cell, then tap a number to fill it in.
Are there hints if I get stuck?
Yes — use the hint button to reveal a correct number, and auto-check highlights mistakes as you play.
Is my progress saved?
Your current game stays in the browser while the tab is open. Start a new puzzle anytime for a fresh challenge.
Does the game pause when I switch tabs?
Yes, the timer pauses automatically when the tab is hidden so your time stays fair.