Photo to Nonogram
Turn a photo or drawing into black and white cells to make a nonogram (picross) puzzle. Clues are calculated automatically, and it checks whether the puzzle has a single solution. Save the puzzle and answer as images, or solve it right on screen.
Puzzle settings
How to use
When it helps
A nonogram is a logic puzzle where you use the numbers on each row and column to find which cells to fill and reveal a picture. Puzzles made from your own pictures are more fun to solve, whether it is a worksheet for kids, a quiz for a get-together or a gift puzzle made from a pet photo.
This tool shrinks the photo to the chosen grid, decides filled cells by brightness, and calculates the row and column clues automatically. It then runs a line-by-line logical solver using only the clues to tell you whether the answer can be found without guessing.
If the solution is not unique, solvers may get stuck or end up with a different picture. In that case, change the threshold or click a few ambiguous cells to fix them. The check updates instantly.
FAQ
What kind of photo works best?
Photos with simple backgrounds and clear outlines. Silhouettes, icons, letters and logos with large solid areas work especially well. Busy photos like landscapes are hard to recognize even with more cells.
The check says "Needs guessing".
Solving line by line from the clues did not decide every cell. There may be more than one answer. Slightly changing the threshold or clicking ambiguous cells in the puzzle image usually fixes it.
What grid size should I use?
10 to 15 for beginners and 20 to 25 for experienced solvers. 30 gives a more detailed picture but takes a long time to solve.
Can I print the puzzle?
Yes. The puzzle PNG has the clues and an empty grid, ready to print. The answer PNG is saved separately.
Is my photo uploaded?
No. The puzzle is made inside your browser, and your photo is never sent anywhere.