About Morniura Sudoku
Morniura Sudoku is a free online Sudoku that anyone can play without signing up. It brings 4×4, 6×6, and 9×9 boards, four difficulty levels, a fresh daily puzzle, and a global leaderboard together in one place.
Last updated: June 2026
What we build
Morniura Sudoku is a responsive puzzle game built to capture the calm feel of paper Sudoku, anywhere. We never force ads or sign-ups, and the experience stays identical across desktop and mobile. Every puzzle is produced by our own Sudoku engine and verified to have exactly one unique solution.
What you can play
From beginner-friendly 4×4 and 6×6 boards to the classic 9×9, with four difficulty levels from easy to expert. Build a streak on the Daily Sudoku — the same puzzle for everyone worldwide each day — and compare your time on the global leaderboard. Prefer paper? Use the printable sheets. Want to race a friend? Share the same puzzle with Friend Challenge.
Fair play and privacy
Solutions are never sent to the browser; completion is confirmed only through our server-side verification API, which keeps leaderboard results trustworthy. You can use every feature as a guest, with progress saved in your browser, or create an account to carry your stats across devices. How we use cookies, ads, and analytics is explained transparently on the privacy page.
Want to learn Sudoku
New to the game? Start with our tutorial and guide covering the rules and fundamentals. We also have dedicated pages that walk through intermediate and advanced techniques — naked pairs, hidden pairs, pointing pairs, X-Wing, XY-Wing, Swordfish, and more — step by step with example boards.
Supported platforms
Morniura Sudoku is web-first and tuned for both mobile and desktop browsers. It can be installed as a PWA to work offline, and it is architected to extend to mobile apps and platforms like Steam in the future.
Contact and operations
Send bug reports and feature requests through the contact page. Maintenance and update news lives on the notices page. Your feedback shapes the next update.