Free library · Updated 2026-07-25
Sudoku puzzles — play free online
A full directory of free Sudoku puzzles with a live board on the page. Pick a difficulty below or start the Medium puzzle on the right.
Play now · medium
Tap a cell, then a number
Today's daily Sudoku puzzles
Browse all Sudoku puzzle types
Easy Sudoku puzzles
High clues · 2–5 min
Medium Sudoku puzzles
Daily sweet spot
Hard Sudoku puzzles
Candidate tracking
Expert Sudoku puzzles
Low clues
Evil Sudoku puzzles
Brutal classic
Extreme Sudoku puzzles
Advanced sessions
Mini Sudoku puzzles
4×4 & 6×6
Kids Sudoku puzzles
Ages 5–10
Classic Sudoku puzzles
Standard 9×9 only
Daily Sudoku puzzles
Four new every day
Printable Sudoku puzzles
Free PDF packs
Play Sudoku online
Instant start
What makes a good Sudoku puzzle site
Searchers typing Sudoku puzzles bounce when the first screen is an ad wall. Zeloku ships a real board in the hero, unique-solution generation, and clear difficulty labels so you can self-select. Techniques pages turn “I got stuck” into “I learned a pattern.”
New to the rules? Read how to play. Want answers explained? Use the Sudoku solver. Prefer paper? Printable Sudoku puzzles.
FAQ
- Where can I find free Sudoku puzzles online?
- Right here on Zeloku. Play a Medium puzzle on this page, open today's four daily difficulties, or generate unlimited new boards with New puzzle. Printable PDF packs are free too.
- How many Sudoku puzzles can I play?
- Unlimited. Landing boards regenerate in the browser, and a new daily set of four difficulties publishes every day after the UTC rebuild.
- What Sudoku puzzle difficulty should I choose?
- Beginners: Easy or mini 6×6. Regular players: Medium daily. Advanced: Hard, Expert, evil or extreme. Match the board to a time slot you can finish without frustration.
- Are these Sudoku puzzles printable?
- Yes. Visit the Printable hub for free PDF booklets by difficulty and for kids sizes.
- Do the puzzles have unique solutions?
- Yes. Every generated 9×9 is checked for uniqueness before it is shown.