Spot the Difference
Spot the difference before the AI does. Find the one picture that's different in 20 free levels — no download, right in your browser.
Looking for the full game with all 20 levels? → spot the difference game
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 recolored, 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.
Start easy. The AI gets brutal around level 15 — most players hit a wall there. Can you beat it?
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 starts slow on the first levels, gets faster as the grids grow, and from level 15 it gets brutal. Beat it by being quicker, or by catching the levels it gets wrong.
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.