Sudoku247 is a free online Sudoku site for players who want a clean place to play, learn techniques, and get unstuck — without signups, paywalls, or a cluttered interface.
Sudoku247 is built and maintained by Mayur Nandu, an independent developer who has played Sudoku for years and wanted a version of the site he actually enjoyed using — fast to load, free, ad-supported but uncluttered, and genuinely useful when you get stuck on a hard puzzle.
Every puzzle, solver, technique guide, and printable PDF on this site is hand-written and tested. If something is broken or you have a suggestion, the email below goes straight to me.
Contact: sudoku247app@gmail.com
A free, no-signup Sudoku site where anyone can play unlimited puzzles, learn solving techniques at their own pace, and get a hint that actually explains the logic — not just the answer.
Get logical hints that explain which technique applies and why, so you learn while you play instead of just being handed the answer.
Fresh puzzles generated instantly across Easy, Medium, Hard, and Expert difficulty — you never run out, and no two are the same.
Detailed guides for every solving technique from Naked Singles to X-Wing, Swordfish, and Y-Wing — each with worked examples.
Type in a Sudoku from a newspaper or book and solve it here — step through the solution to see which technique applies at each move.
Yes. Every puzzle, hint, technique guide, and printable PDF is free. The site is supported by ads (Google AdSense) so nothing is paywalled.
The solver scans the current board for the simplest logical technique that applies — a Naked Single, Hidden Pair, X-Wing, and so on — then explains which cells it involves and why, so you learn the pattern rather than just getting the answer.
Yes. Type a Sudoku from a newspaper or book into the grid on the Enter a Puzzle page, then play it with hints or reveal the full solution.
Four levels: Easy, Medium, Hard, and Expert. Each level uses a different set of required solving techniques, so the difficulty is honest — not just fewer clues.
Bug report, feature idea, or just want to say hi? Email goes straight to me.
Email: sudoku247app@gmail.com
Made with by Mayur Nandu