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Free online Sudoku with handwriting input

SudoSketch

Play Sudoku online like paper. Write numbers directly into the grid using finger, stylus or Apple Pencil, with free play, daily challenges and visual coaching.

Write Naturally

Handwriting input with finger, stylus or Apple Pencil.

Smart Tools

Notes, highlights and optional checks to solve with confidence.

All Levels

Beginner to Insane puzzles for every skill level.

Sudoku Solver Learn Sudoku

Daily Sudoku Challenge

Solve today’s daily Sudoku puzzle and compete for the fastest clean solve times.

Hints and checks excluded 🛡️

Play free Sudoku online

SudoSketch is a free online Sudoku game designed to feel closer to solving Sudoku on paper. Instead of relying purely on tapping tiny buttons, you can write numbers directly into the Sudoku grid using handwriting input.

Whether you are learning Sudoku for the first time or already deep into advanced logic techniques, SudoSketch gives you a clean, modern way to play Sudoku online with notes, highlighting, daily challenges and multiple difficulty levels.

Play beginner Sudoku, easy Sudoku, medium Sudoku, hard Sudoku, master Sudoku and insane Sudoku directly in your browser with no download and no account required.

Why SudoSketch feels different

Write

Handwriting input

Draw numbers naturally using your finger, stylus or Apple Pencil directly inside the Sudoku grid.

Solve

Smart Sudoku tools

Use notes, highlights and optional mistake checking to solve puzzles faster without clutter.

Coach

Learn the logic

Use the coach and learning pages to understand Sudoku techniques rather than just being handed answers.

Sudoku built for proper solving

Good Sudoku is not only about removing more numbers from the grid. Real Sudoku difficulty depends on the logic required to solve the puzzle.

SudoSketch is designed around proper Sudoku solving progression, from simple scanning and singles through to advanced deduction and deeper logic techniques.

Easy Sudoku puzzles focus on accessible solving and confidence building. Medium Sudoku introduces more deliberate candidate work. Hard Sudoku and master Sudoku push logical deduction further, while insane Sudoku is built for experienced players who enjoy advanced solving techniques and brutal logic chains.

Every Sudoku puzzle is designed to feel fair, logical and satisfying rather than random or guess-based.

Explore Sudoku difficulty levels

Beginner

Learn Sudoku

Perfect for first-time players learning Sudoku logic and grid scanning.

Beginner Sudoku
Easy → Insane

Scale the challenge

Progress from easy Sudoku to medium, hard, master and insane difficulty levels.

Explore Levels
Daily

Fresh daily Sudoku

New daily Sudoku puzzles every day with leaderboard tracking and clean solve rankings.

Daily Sudoku

Start a Sudoku puzzle now

No downloads. No accounts. Just Sudoku, logic and the occasional muttered insult at a 3x3 box.

Sudoku FAQ

Can I play Sudoku online for free?

Yes. SudoSketch is completely free to play online with no sign-up required.

Does SudoSketch support Apple Pencil?

Yes. SudoSketch supports Apple Pencil, stylus and finger handwriting input.

What Sudoku difficulty levels are available?

Beginner, Easy, Medium, Hard, Master and Insane Sudoku puzzles are available.

Can I play on mobile and tablet?

Yes. SudoSketch works across desktop, laptop, tablet and mobile browsers.

Keep exploring

Learn Sudoku Sudoku techniques Handwriting recognition Difficulty grading