Free Online Brain Games – Sudoku, Word Scramble, Memory & Math

Quick games that train your memory, focus, logic and reflexes. Play a daily Sudoku or word puzzle, race the clock at mental math, test your number memory, or take on an unbeatable tic-tac-toe opponent. No downloads, no sign-up, and your best scores are saved in your browser.

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SudokuNEW

Play free Sudoku online: a new daily puzzle, unlimited random puzzles in easy, medium, hard and expert, with notes, hints, undo and mistake checking.

Word ScrambleNEW

Unscramble the letters to find the hidden word. A new set of 10 words every day, or random rounds, with hints and a score.

Memory GameNEW

Flip cards and find matching pairs in as few moves as possible. 12, 16, 20 or 36 cards, with a timer and best score. Great for kids and adults.

Tic-Tac-ToeNEW

Play tic-tac-toe (noughts and crosses) against the computer on easy, medium or unbeatable, or against a friend on the same device.

Sliding PuzzleNEW

Slide the numbered tiles into order in as few moves as possible. 8, 15 and 24 puzzles, always solvable, with move counter and best score.

Mental Math GameNEW

Answer as many addition, subtraction, multiplication and division questions as you can in 60 seconds. Three levels, best score saved.

Number Memory TestNEW

Test your short-term memory: remember a number shown for a few seconds, then type it. Each level adds a digit. See how you compare to the average.

Aim TrainerNEW

Click 30 targets as fast as you can to test and train your aim. Three target sizes, average time per target, accuracy and best score.

Colour Word Test (Stroop)NEW

Name the ink colour, not the word, as fast as you can for 30 seconds. A classic test of focus and attention that measures your Stroop effect.

Games that exercise your brain

A few minutes of play is a good break, and the right games keep your memory, attention and logic sharp too. Every game here opens instantly, works on phones and computers, and keeps your best scores in your browser.

Which game should I play?

I want to…	Play
Solve a logic puzzle	Sudoku
Play with words	Word Scramble
Train my memory	Memory Game or Number Memory Test
Get faster at mental arithmetic	Mental Math Game
Test my focus	Colour Word Test (Stroop)
Improve my mouse aim	Aim Trainer
Play a quick classic	Tic-Tac-Toe or Sliding Puzzle

Daily puzzles

Sudoku and Word Scramble have a puzzle of the day. Everyone gets the same puzzle, and a new one starts at midnight in your time zone, so you can compare times and scores with friends and family.

More quick tests

Reaction time test, typing speed test, CPS test, spin the wheel and dice roller.

Frequently asked questions

Are the games free?

Yes, all games are completely free, with no sign-up, download or in-game purchases.

Do the games work on phones?

Yes. Every game works with touch as well as a mouse and keyboard, and the boards resize to fit your screen.

Where are my best scores saved?

In your browser on this device. They're never sent to our servers, and clearing your browser data resets them.

What are the daily puzzles?

Sudoku and Word Scramble have a puzzle of the day that is the same for everyone and changes at midnight in your time zone, so you can compare results with friends.