Free Online Sudoku Puzzles
Play free online sudoku in your browser — from gentle starter grids to expert puzzles that take real logic. Browse the full archive below: no app, no registration, and a new sudoku published every week.
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Free Online Sudoku Archive
Free Online Sudoku, New Puzzles Every Week
Sudoku is pure logic: fill the 9×9 grid so that every row, every column and every 3×3 box holds the digits 1 to 9 exactly once. No arithmetic, no vocabulary, no trivia — only the numbers already on the board and what they let you rule out.
Every sudoku here is free to play online, directly in your browser on desktop, tablet or phone. Warm up on an easy grid or go straight for a hard one — we add new free online sudoku puzzles every week.
What Is Sudoku?
A 9×9 grid divided into nine 3×3 boxes. Each row, each column and each box has to contain the digits 1 to 9 once and only once. The numbers printed at the start are your only clues — and every grid has exactly one valid solution.
How to Solve a Sudoku
Look for the digit that fits in only one cell of a row, column or box, and work outwards from there. Pencil in the candidates when a square gets crowded, and never guess: every sudoku here can be finished with logic alone.
Free Online Sudoku, No Sign-Up
Every sudoku on this page is free to play online in your browser, on desktop, tablet or phone — no account, no subscription, nothing to download. New grids are added every week and the whole archive stays open.
Frequently asked questions
Still have a question? The answers below cover how our free online sudoku puzzles work, what you need in order to play, and where to start.
How do you play sudoku?
Fill every empty cell so that each row, each column and each 3×3 box contains the digits 1 to 9 exactly once. The digits already printed in the grid are your starting clues, and each puzzle has a single solution you can reach by logic alone.
Are these sudoku puzzles really free to play online?
Yes. Every sudoku on this site is free to play online in your browser — no subscription, no account, and nothing to download. Open a puzzle and start solving.
Can I play free online sudoku on my phone?
Yes. The grids are built to work in any modern mobile or desktop browser, so you can play a free online sudoku on your phone, tablet or computer without installing an app.