Sudoku, made yours
Sudoku Glow is a calm, ad-free Sudoku game with unusually deep personalization. Make the board easier to read, tune the amount of help you receive, or change the entire look without interrupting your puzzle.
Choose from an extensive library of light and dark themes, save favorites, rotate themes automatically, or build a custom palette for the board, controls, text, highlights, errors, and successes.
Explore themes →Pick from 49 sans-serif, serif, display, and monospaced fonts. Use a separate font for board numbers and adjust their size and weight independently.
Open display settings →Control related-cell and matching-number highlights, error visibility, guess validation, automatic candidates, note removal, hint limits, and mistake limits.
See gameplay options →Resize the board, tune border weight and contrast, place controls on either side, reduce motion, or play by keyboard, touch, or pointer.
View accessibility features →Move from your first puzzle through pairs, fish, wings, chains, and expert techniques with a complete Sudoku guide.
Learn Sudoku →Generate fresh printable puzzles in seven difficulty levels, with a clean answer key included.
Print a puzzle →Enter any Sudoku grid to check a puzzle or find its solution, then return to practice at your preferred level.
Use the solver →Play at seven levels—from a welcoming Kids mode through Easy, Medium, Hard, Expert, Master, and Evil—then use private on-device statistics to follow best times, averages, streaks, and completed games.
Yes. Sudoku Glow is free to play in your browser and keeps the puzzle experience free from advertising.
Yes. You can choose from theme presets or create custom colors, select from 49 fonts, change board number size and weight, adjust borders and board size, and move the controls.
Sudoku Glow includes Kids, Easy, Medium, Hard, Expert, Master, and Evil puzzles.
Yes. It includes pencil marks, optional automatic candidates, automatic note removal, configurable hints, undo, error checking, and related-cell highlighting.