Free online sudoku
Play Sudoku Online — Free in Your Browser
A curated collection of free sudoku — classic 9×9 boards, variant grids and seasonal puzzles, all in one place. Instant play, no download, no sign-up.
- 22+ free games
- No download required
- Plays on any device
- 100% safe to play
Player Favourites
Popular Sudoku Games
All Free Sudoku Games
The full catalogue — classic 9×9, variant grids and logic puzzles, each playing straight in your browser.
What makes a good sudoku puzzle?
Sudoku is a logic puzzle, not a maths test: the digits one to nine are just symbols, and the only rule is that each must appear once in every row, every column and every three-by-three box. A good puzzle has exactly one solution and can be reached by reason alone — you never have to guess. That single-solution promise is what separates a fair board from a frustrating one.
Difficulty comes from how much the puzzle makes you look ahead. Easy boards fall to scanning a row or column for the one missing digit; harder ones hide their next move behind techniques like naked pairs, hidden singles and X-wings, where you rule a number out of a cell rather than placing it directly. The catalogue spans that whole range, so there is a board for a quick coffee break and one for a long, quiet evening.
Why Choose Us
Built for calm, focused solving
No Download, No Sign-Up
Every board here opens straight in the browser — Chrome, Safari, Firefox or Edge, on a phone, tablet or laptop. Nothing installs and no account stands between you and the first puzzle. Tap a thumbnail, let it load for a moment, and the grid is ready to fill.
Made for Unhurried Play
Sudoku rewards patience, not speed. A single board can fill a quiet ten minutes or stretch across a slow evening — there is no clock forcing your hand and no penalty for pausing to think. The layout stays legible on a small phone screen and a wide monitor alike.
Hand-Picked and Family-Safe
Each title is added by hand and checked on real devices. No adult themes, no in-game purchases, no permission pop-ups partway through — just a number grid and the quiet logic of filling it in. It stays gentle enough to share on one screen with anyone.
Learn the Game
All articles
Master Your Game — Guides Written by Players
How-To & Rules
How to Play Sudoku: Rules & Beginner’s Guide
Sudoku is a logic puzzle played on a 9×9 grid. There is no math and no guessing involved — just one simple…
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Printable Sudoku
Printable Sudoku: Free PDF Puzzles (Easy to Evil)
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How-To & Rules
Sudoku Rules: How the Puzzle Works
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About the Site
A catalogue built by sudoku players
Free Online Sudoku Games is run by a small team that grew up on newspaper sudoku, pencil-and-paper logic puzzles and the number grids of the 2000s. We pick each board by hand, play it through on real phones and laptops, and keep only the ones that stay fair and readable. The catalogue is young and grows on purpose — right now it holds 22 games across classic 9×9, variant grids and themed puzzles — with more added as we test them.
22
Free games
9×9
Classic & variants
100%
Browser play
$0
Always free
Questions & Answers
Frequently asked questions
Are these sudoku games free to play?
Yes. Every game in the catalogue is free, with no trial limit and no paid upgrade. Ads load around the puzzle window to keep the site running, never on top of the grid you are solving.
Do I need to download anything to play?
No. Every board runs inside your browser using HTML5 — no installer, no plug-in, no separate app to open. If this page loads for you, the puzzles will play too.
What kinds of sudoku are here?
The catalogue covers classic 9×9 sudoku plus variants and related logic puzzles — wordoku, shape grids, seasonal boards and more. Browse the full list on the catalogue page, or jump to a category from the chips at the top.
Will they work on my phone or tablet?
Most do. Sudoku suits a touchscreen well — you tap a cell and tap a number — and the page resizes for small screens. A few older titles are more comfortable on a larger display.
Are these games suitable for children and older players?
Yes. Every title is chosen by hand, with no adult content and no in-game purchases. Sudoku is a quiet, unhurried puzzle that suits players building patience as much as it suits anyone who just wants a calm break.
Can I print sudoku to solve on paper?
Yes — the blog has a set of free printable PDFs across several difficulty levels, with answer keys, so you can play away from the screen. See the Printable Sudoku guide in the blog.
Ready to play?
Pick a board. Start solving.
Open a classic 9×9 grid, try a variant, or print a puzzle for later — free, in your browser, and ready in a couple of seconds.
Browse all 22 games