🧩 Sudoku

A clean Sudoku you can play here or print. Four difficulties, a new daily puzzle, pencil marks and hints — and a printable PDF (with the solution) for pen and paper.

✓ Free Forever · ✓ No Signup · ✓ No Upload · ✓ Works Offline

🔒 Played entirely in your browser. Puzzles are generated and solved on your device. Nothing about your game is uploaded, and there is no account or tracking.

Features

  • Four difficulties — Easy, medium, hard and expert — every puzzle has exactly one solution.
  • Daily puzzle — A new shared puzzle each day — everyone gets the same board to compare times.
  • Pencil marks & hints — Jot candidate notes, check your work, or reveal one square when you are stuck.
  • Printable PDF — Export the puzzle and its solution as a clean A4 PDF for pen and paper.

How It Works

  1. Pick a difficulty — Choose easy to expert, or switch on the daily puzzle.
  2. Play — Tap a cell and type — use notes for candidates, or a hint if you get stuck.
  3. Print it (optional) — Export a printable PDF with the solution on the second page.

Use Cases

  • A quick daily brain workout
  • Print puzzles for kids, a classroom or a coffee break
  • Play offline — it all runs locally
  • Build a PDF pack to solve on paper

Frequently Asked Questions

Does every puzzle have a unique solution?

Yes. Squares are only removed while a single solution remains, so you never have to guess between two valid answers.

Is the daily puzzle the same for everyone?

Yes — the daily board is generated from the date, so you and a friend get the identical puzzle to race on.

Can I print Sudoku to do on paper?

Yes. "Printable PDF" gives you a clean A4 sheet with the puzzle, and the solution on a second page.

Is anything uploaded or saved?

No. Puzzles are generated and checked in your browser — no account, no upload, no tracking.

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    💬 Bug, idea, or just to say hi? Tell Milo 🐨 · [email protected]