Play Free Nonograms Online — Japanese Crosswords from 5×5 to 30×30
Nonograms — also known as Japanese crosswords, Picross, and Griddlers — are logic puzzles where you reveal a hidden pixel-art image by filling in cells on a grid according to numbered clues. Whether you're picking up a puzzle for the very first time or hunting for a fiendish 30×30 Evil grid to test years of experience, Nonogram Online gives you every size and difficulty level in one clean, free-to-play interface.
No downloads. No registration. Just pure logic.
What Are Nonograms?
A nonogram presents you with a rectangular grid — anywhere from a tiny 5×5 to an expansive 30×30 — flanked by sequences of numbers along each row and column. Each number tells you the length of a consecutive block of filled cells in that line. Your task is to use those clues, combined with logical deduction, to determine which cells are filled and which remain empty, ultimately exposing a picture hidden within the grid. The puzzle form originated in Japan in the late 1980s and spread worldwide under names like Picross (Nintendo's trademarked branding), Griddlers (common in Europe), and Hanjie (UK). Whatever name you know them by, the underlying logic is identical — and endlessly satisfying.
Choose Your Grid Size
Every grid size on Nonogram Online has its own character and cognitive demand. Here's how to find your fit:
5×5 & 6×6 — Perfect Starting Points With just 25 or 36 cells to work with, these grids are ideal for beginners learning the core mechanics. Solutions are reachable in minutes, making them great warm-up puzzles or quick mental breaks.
→ Play: 5×5 Nonograms | 6×6 Nonograms
8×8 & 10×10 — Building Fluency Step up to grids where clue combinations start to interact in more interesting ways. An 8×8 already demands you track both row and column constraints simultaneously; a 10×10 is where many players feel they've truly learned nonograms.
→ Play: 8×8 Nonograms | 10×10 Nonograms
12×12 & 15×15 — Intermediate Challenge These sizes produce recognizable pixel-art images and require genuine multi-step deduction. Expect to spend 10–30 minutes on a medium-difficulty puzzle at this scale.
→ Play: 12×12 Nonograms | 15×15 Nonograms
20×20 & 25×25 — Advanced Territory At this scale, puzzles become immersive sessions. Rows with multiple clue blocks create cascading deductions across the grid, and a single logical breakthrough can unlock dozens of cells at once — deeply rewarding.
→ Play: 20×20 Nonograms | 25×25 Nonograms
30×30 — Maximum Complexity The largest grids on the platform. A Hard or Evil 30×30 nonogram can occupy an expert solver for an hour or more. These puzzles are the closest experience to professional Griddler publications you'll find online.
→ Play: 30×30 Nonograms
Six Difficulty Levels — From Easy to Evil
Every grid size comes in six difficulty tiers, so you always have an appropriate challenge waiting:
| Difficulty | What to Expect |
|---|---|
| Easy | Sparse clues, wide open spaces; solvable with basic overlap logic |
| Medium | Balanced constraint density; introduces partial deductions |
| Hard | Multiple clue blocks per line; requires systematic elimination |
| Expert | Tight constraint sets; demands hypothesis-and-verify techniques |
| Extreme | Near-maximal constraint complexity; very few "free" cells |
| Evil | The hardest tier — expect contradictions, edge-case logic, and real perseverance |
Core Solving Strategies
Whether you're on a 5×5 Easy or a 25×25 Evil, these foundational techniques carry you through:
1. Overlap Analysis (The First Move) For any row or column, place the clue blocks at the leftmost possible position and also at the rightmost possible position. Any cells that are filled in both scenarios are definitively filled. On crowded rows, this alone can reveal the majority of cells immediately.
2. Edge Anchoring When a clue's block length is close to the total line length, the block must start near (or at) the edge. An 8-clue in a 10-cell row must occupy cells 1–8, 2–9, or 3–10 — meaning cells 3–8 are always filled regardless of the final position.
3. Cross-Reference Elimination Never analyze rows in isolation. Every cell you fill or mark empty propagates new constraints to its column (and vice versa). Developing a rhythm of alternating between rows and columns is the single biggest leap from beginner to intermediate solver.
4. Block Separation When two consecutive clues are separated by a required gap, you can often infer a "must be empty" cell between them — eliminating possibilities and reducing ambiguity across the entire line.
5. Contradiction Checking (Advanced) If assuming a cell is filled leads to an impossible state anywhere in the grid, it must be empty — and vice versa. Use sparingly; on Easy and Medium it's rarely needed, but on Expert through Evil it becomes an essential tool.
When Logic Isn't Enough — Use the Nonogram Solver
Some puzzles — particularly at Expert, Extreme, and Evil levels on larger grids — present constraint states that are genuinely difficult to resolve through visual inspection alone. That's where the Nonogram Solver comes in. Available for every grid size, the solver accepts your current clue configuration and applies a full constraint-propagation algorithm to compute the solution (or narrow down remaining possibilities). It's designed not to rob you of satisfaction, but to help you past a specific blocking point so you can continue playing.
Available sizes: 5×5 · 6×6 · 8×8 · 10×10 · 12×12 · 15×15 · 20×20 · 25×25 · 30×30
Why Play Nonograms Online?
Proven Cognitive Benefits
Regular engagement with logic puzzles like nonograms strengthens working memory, improves concentration, and develops systematic thinking. Unlike many casual games, nonograms require sustained deductive reasoning from first cell to last.
Pixel Art as Reward
Every solved puzzle reveals a picture. That visual payoff — the moment a pixelated cat, rocket, or landscape snaps into view — is a uniquely satisfying loop that keeps solvers returning to the next puzzle.
Scalable Depth
Few puzzle formats scale as gracefully as nonograms. The same core ruleset that fits on a 5×5 grid for a five-year-old produces puzzles that stump adult enthusiasts on a 30×30 board. You never outgrow the format.
Completely Free
Every puzzle on Nonogram Online — across all nine grid sizes and six difficulty levels — is free to play in your browser, with no account required.