Spot the Difference
Find the one picture that is different. Free, instant, and you race an AI on every puzzle.
How this spot the difference works
Each puzzle is a grid of identical pixel pictures with exactly one copy that is a little different: a pixel recoloured, a dot missing, an edge that moved. Spot the difference, tap it, and the round ends.
Luna AI scans the same grid at the same moment. If you find the odd picture first, you take the round. Three quick puzzles make a match; the grids grow from 4×4 to 6×6 as you go.
Want a longer challenge?
The full spot the difference game has 20 levels, from 3×3 warm-ups to 9×9 grids with a clock that shrinks every level, three chances per run and a daily leaderboard.
Pick your style
- Easy puzzles with bigger, more obvious changes.
- Hard puzzles where a single pixel is different.
- Kids puzzles with three-by-three grids and a long timer.
- Christmas puzzles with trees, gifts and snowmen.
- Printable sheets with an answer key for the classroom or a rainy day.
Frequently asked questions
Is spot the difference free?
Yes. Every puzzle on this site is free to play in the browser, with no signup and no download.
Can I play spot the difference against AI?
Yes. Every puzzle here is a race against Luna AI, our in-game simulated opponent. You both see the same pictures at the same moment and whoever finds the odd one first wins. It plays with human-like speed and still makes mistakes on the big grids.
How many differences are there?
Exactly one per puzzle: one picture in the grid is not like the others. In the hard mode only a single pixel changes.
Does it work on phones?
Yes. The board fits one screen on phones, tablets and desktops, and every cell is a large tap target.