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Pixel Riddle — Nonogram Online

by crokocat · Puzzle
Plays on
Desktop · Phone · Tablet
Price
Free · no download · no sign-up

Pixel Riddle is a nonogram — also called picross or paint by numbers — built out of little 3D blocks. The numbers beside each row and above each column tell you how the filled cells run in that line; fill the right ones and a hidden pixel picture appears, turns to full colour and tips up to show itself off.

Each number is a run of filled cells in that row or column, in order, with at least one empty cell between runs. A row marked 3 1 has a run of three, a gap, then a single cell. Put the rows and columns together and there is only one picture that fits them all.

Every picture can be worked out from the numbers alone. Before a puzzle is used, a solver that only looks at one line at a time — exactly what a person does — must be able to finish it, which also means the answer is unique.

Painting is quick: press on a cell and drag along its row or column to fill a whole run in one stroke, or switch to the cross to rule cells out. When a line has all its filled cells, its numbers grey out and the rest of the line is crossed for you.

The first picture teaches itself: one line at a time lights up, its numbers pulse, a single sentence says why those cells must be filled, and a hand shows the drag — all the way to the finished heart. On every later level the bulb does the same for the next line you can work out, if you get stuck; a picture solved without it and without mistakes earns three stars.

You have three hearts. A cell painted wrong costs one and shows what it really is; lose all three and the picture starts over. A picture with no mistakes earns three stars.

Levels is an endless ladder: small 5×5 pictures to learn on — a heart, a house, a tree — then 8×8 animals and objects, then 10×10, and past the picture book, mirrored pixel sprites. Finished pictures turn from ink blue into their real colours with a wave.

The board and the blocks are drawn in 3D in the browser, so there is nothing to install. The game is sized for a phone held upright and plays with a mouse too.

How to play Pixel Riddle

Fill the cells the numbers describe and reveal the picture:

Desktop: Click and drag to paint; the row and column under the mouse are highlighted. Escape returns to the menu.
Mobile: Tap or drag with a finger; switch fill and cross with the round buttons under the grid.

Game modes

ModeWhat changesWho it's for
LevelsAn endless ladder: 5×5 pictures on levels 1–6, 8×8 on 7–16, 10×10 from 17, then mirrored sprites past the picture book. Three hearts per picture, three stars for no mistakes; progress saved.Anyone who likes a calm logic puzzle with a reward at the end.

Tips for Pixel Riddle

Who made Pixel Riddle?

Pixel Riddle was built by crokocat game studio in 2026 — classic nonogram rules on 3D blocks drawn in the browser, a hand-drawn picture book checked by a line solver so every puzzle is solvable by logic, drag painting, hearts, and pictures that reveal themselves in colour.

About this game

Controls
Tap a cell to fill it, or press and drag along a row or column to fill several. Switch the round button under the grid to the cross to mark cells you know are empty. The bulb highlights the next line you can work out and says why. Back returns to the menu.
Supported devices
desktop, phone, tablet
Developer
crokocat
Genre
Puzzle
Release date
September 2026
Latest update
September 2026

Related categories

puzzlelogicbraincasual3d

Frequently asked questions

Is Pixel Riddle free to play?

Yes. Pixel Riddle is free on crokocat with no download and no sign-up — it runs in your browser on desktop, phone and tablet.

Is Pixel Riddle a nonogram or picross puzzle?

Yes. Nonogram, picross, griddlers and paint by numbers are names for the same puzzle — Pixel Riddle is one, played on 3D blocks.

What is a nonogram?

A picture logic puzzle, also called picross, griddlers or paint by numbers. Numbers beside the rows and columns give the lengths of filled runs; working them out reveals a pixel picture.

Will I ever have to guess?

No. Every picture is checked by a solver that only reasons one line at a time before it is used, so there is always a logical next step.

What happens when I paint a wrong cell?

It costs one of three hearts and the cell shows what it really is. Lose all three and the picture starts over.

How do I fill many cells at once?

Press on a cell and drag along its row or column; the stroke stays on that line.

How many pictures are there?

The ladder is endless: a hand-drawn picture book first, from 5×5 to 10×10, then mirrored pixel sprites generated for each level.

Guides & tips

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