Logic puzzles to play online, free and without an app

Logic puzzles, free to play in the browser: Sudoku, Minesweeper, Nonograms, Kakuro, Lights Out, 2048, Word Search, Memory Match, the Sliding Puzzle, and two games against the computer, Reversi and Four in a Row. No app, no sign-up and no interstitial before you play; every game works offline after your first visit and can be played with the keyboard alone.

• Sudoku

  Unique-solution grids from easy to evil, with notes, technique hints and a daily.

• 2048

  Slide and merge tiles on boards from 3×3 to 8×8, with 4096 and 8192 targets.

• Minesweeper

  Beginner to expert boards, safe first click, chording, flags and a daily.

• Word Search

  Twenty themed word lists, a kids mode and printable sheets.

• Nonogram

  Picture logic grids from 5×5 to 20×20, always solvable by logic alone.

• Memory Match

  Flip pairs of hand-drawn symbols on 4×4 and 6×6 boards.

• Sliding Puzzle

  The 8, 15 and 24 puzzle; every shuffle can be solved.

• Kakuro

  Cross sums with unique solutions, pencil marks and a checker.

• Lights Out

  Switch every light off on a 5×5 board; every start is solvable.

• Reversi

  Flip discs against a computer opponent with three strengths.

• Four in a Row

  Drop discs and line up four against the computer.

Number logic: Sudoku and Kakuro

Sudoku is the centre of the site. Every grid is generated with exactly one solution and then rated by the human techniques it needs, so a level means the same thing every time: Easy uses singles only (36 to 45 clues), Medium adds hidden singles and pointing pairs (30 to 35), Hard adds naked and hidden pairs, triples and box-line reductions (26 to 30), Expert adds X-wing, Y-wing and swordfish (24 to 27), and Evil needs chains or a guess (22 to 25). Notes, auto-notes, conflict highlighting, a Check button and hints that name the technique are all built in. There is a daily, 4×4 and 6×6 grids for children, printable sheets and a solver.

Kakuro is the crossword cousin: each run of cells must add up to its clue with no repeated digit. Our grids are 9×9 on Easy and 12×12 on Hard, every one has a unique solution, and you get pencil marks and a checker.

Deduction on a hidden board: Minesweeper and Nonograms

Minesweeper comes in the three classic sizes, Beginner (9×9, 10 mines), Intermediate (16×16, 40 mines) and Expert (30×16, 99 mines), plus a Custom board. The first click always opens an empty region, because the mines are placed after it. Flags, question marks, chording on a satisfied number, long-press to flag on touch and zoom on the big board are all there, with best times per level and a daily Expert board.

Nonograms, also called picture logic, come in 5×5, 10×10, 15×15 and 20×20. Every pattern is checked with a line-logic solver before you see it, so it can be finished without guessing. Clues dim as you satisfy them, you can paint by dragging, switch between fill and cross, and ask for a hint that points to one determinable cell. The daily is 15×15.

Sliding, merging and switching: 2048, Sliding Puzzle and Lights Out

2048 uses the classic rules, new tiles of 2 or 4 and one merge per tile per move, on boards from 3×3 to 8×8, with 4096 and 8192 targets on the standard board and a keep-playing option once you reach the goal. Swipe, arrows or WASD; best score per size; one step of undo.

The Sliding Puzzle is the 8, 15 and 24 puzzle on 3×3, 4×4 and 5×5 boards. Shuffles are made by playing random legal moves from the solved position, so every start can be solved. Lights Out is a 5×5 board where pressing a light toggles it and its neighbours; the start state is made by random presses, so a solution always exists, and you can replay it after you finish.

Words and memory: Word Search and Memory Match

Word Search has twenty themes, from animals and food to space and weather, with family-friendly word lists written for this site. Words run in eight directions and can overlap; select by dragging or by clicking the first and last letter. There is a kids mode with fewer, shorter words in four directions, and a printable version with a word bank.

Memory Match flips pairs of symbols drawn in-house on 4×4 and 6×6 boards, counting moves and time and keeping your best per size. It plays with the keyboard too.

Against the computer: Reversi and Four in a Row

Reversi and Four in a Row are the two turn-based games. Both play against a computer opponent with three strengths, highlight your legal moves and let you undo. Easy is a fair opponent for learning the game; Hard looks several moves ahead and will punish a careless corner or column.

Dailies, puzzle codes and what is fair

Sudoku, Minesweeper and Nonogram each have a daily puzzle that is the same for everyone and changes at midnight UTC. Every other puzzle gets a short code such as A7K3Q; type it into the same page to replay the exact puzzle, or send it to a friend. The guarantees behind each game, unique solutions, line-solvable nonograms and solvable shuffles, are described on the How it works page.

Every board reserves its size before it loads, so nothing jumps. The timer pauses when you switch tabs and hides the board while paused, and your in-progress puzzle is saved on the device so you can pick it up later.

Last updated 2026-09-27.