No signup, nothing to install, no pencil: click to fill a cell, right-click (or the ✕ Mark tool) to cross out an empty one, and the picture appears when the grid closes.
Runs in your browser; nothing is sent anywhere and your progress is saved on this device. On a phone, turn the screen sideways.
The worked example, drawn step by step, is in how to solve nonograms.
These are exactly the ones in the free printable pack — if you would rather solve on paper, that is the same set, with answers. 5 at 10×10, 4 at 15×15, 1 at 20×20.
None of these 10 are in the book. They were drawn for Pixel Logic vol. 1 and left over when it filled up at 100 — so playing here and buying later means paying for nothing twice.
A pretty nonogram and a correct nonogram are different things: you can build a grid whose clues admit two different pictures, and the player stalls without having made a single mistake. The 10 here went through the same gate as the 100 in the book — a solver that uses only row and column deduction rebuilds the drawing cell by cell, and a picture it cannot close on its own does not ship.
If you build your own nonograms, that gate is public: the nonogram checker tells you whether your drawing closes without guessing, and the nonogram solver tells you what is wrong with a set of clues.
Teaching with these? Nonograms in the classroom puts the same ten sheets in the order to hand them out.