About Sudoku24x7

Sudoku24x7 is a free sudoku site: play online across five difficulty levels, get hints that explain the reasoning instead of just the answer, print puzzles for offline use, or run any grid through a step-by-step solver. There's no account, no login, and no data sent anywhere to save your progress — settings, saved games, and stats live in your browser's local storage, on your device only.

What makes the puzzles different

Every puzzle here is generated by our own code and checked for exactly one solution before it's shown to anyone — nothing is pulled from a shared puzzle bank. Difficulty is graded by the hardest logical technique a puzzle actually requires, not by how many clues are left, and that same logical solver powers in-game hints and the step-by-step solver page. See how our puzzles are generated for the full pipeline.

Who's behind this

Sudoku24x7 is built and maintained from India.

Get in touch

Questions, corrections, or something broken? Visit the contact page.