Write naturally
Use the tool that feels right
Write numbers directly into the Sudoku grid with a finger, stylus or Apple Pencil, instead of being confined to a tiny keypad.
About SudoSketch
SudoSketch is built for thoughtful Sudoku
A free online Sudoku game for people who enjoy the calm, satisfying rhythm of solving a proper puzzle.
Why SudoSketch exists
SudoSketch started from a simple idea: online Sudoku should not force every player into tiny keypad tapping. If you enjoy writing numbers into a grid, the digital version should respect that rhythm.
It combines free online Sudoku with handwriting input, notes, daily puzzles, six difficulty levels, step-by-step coaching and interactive learning. The point is not to make Sudoku noisy. It is to make it feel natural, fair and genuinely useful.
SudoSketch is for anyone who wants the convenience of a browser game without losing the clear, deliberate feeling of solving on paper.
The SudoSketch approach
Solve with logic
Human-first puzzles
SudoSketch is designed around fair solving paths, helpful notes and logical progress rather than blind guessing.
Build confidence
Learn at your pace
From Beginner to Insane, the levels, Coach and lessons give every solver a clear next step.
More than a single Sudoku board
SudoSketch helps players move from spotting obvious numbers to understanding why each move works. Technique guides explain the pattern, the Learn Arena gives you a place to practise it, and Sudoku Coach helps you find it in a real puzzle.
That path runs from a first Naked Single to X-Wings, chains and deeper logic. Daily challenges, printable puzzles and the archive make it easy to come back when you have a few quiet minutes.
See SudoSketch in practice
Play a real puzzle
Choose a level, keep notes and solve in a clean board designed for a focused session.
Get help without losing the puzzle
Coach is there to help you understand the next useful idea, so the solve still feels like your own.
About SudoSketch FAQ
Is SudoSketch free?
Yes. SudoSketch is free to play online without creating an account.
Who is SudoSketch for?
SudoSketch is for anyone who enjoys Sudoku, from beginners learning the rules to experienced players who want harder logic puzzles.
What makes SudoSketch different from other Sudoku sites?
SudoSketch combines handwriting input, fair logical puzzles, interactive lessons and a Coach that explains Sudoku techniques clearly.