Free Nonogram Solver
Solve Nonogram puzzles fast by entering row and column clues. Get visual solutions with step-by-step solving logic and pattern recognition.
Nonogram Solver
Solve Nonogram (Picross/Griddler) puzzles by entering row and column clues. Get visual solutions with step-by-step solving logic.
Try Example Puzzles:
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What is a Nonogram Solver?
A Nonogram Solver is an AI-powered logic tool that helps users complete nonogram (also called picross or griddler) puzzles by analyzing row and column clues to generate a correct grid pattern. This tool is essential for players stuck on difficult puzzles, educators teaching logic concepts, and puzzle creators verifying their designs.
People searching for nonogram solver usually want to input their puzzle clues and instantly get a solved visual grid with step-by-step logic explanations. Our free tool uses advanced constraint satisfaction algorithms and pattern recognition to solve puzzles efficiently while showing the reasoning behind each step.
How to Use the Nonogram Solver Tool
- Select Your Grid Size
Choose from preset sizes (5x5, 10x10, 15x15, 20x20) or enter custom dimensions up to 25x25 for optimal performance.
- Enter Row and Column Clues
Input clues in the format "3 1 2" (meaning 3 filled, gap, 1 filled, gap, 2 filled). Each row/column gets one line of clues.
- Configure Advanced Settings
Enable multiple solutions detection, symmetric pattern highlighting, or step-by-step solving explanations for learning purposes.
- Get Visual Solution
View the solved grid with filled (black) and empty (white) cells, plus optional solving steps and pattern insights.
Types of Nonogram Solver You Can Generate
🎯 Basic Nonogram Solver
Solve standard puzzles from row and column clues using constraint satisfaction and line-solving techniques.
🔄 Symmetry-Aware Solver
Detect and highlight symmetric patterns in solutions, perfect for decorative puzzles and artistic nonograms.
🧠 Step-by-Step Explainer
Show detailed solving logic with each decision explained, ideal for learning nonogram solving strategies.
🔍 Multiple Solution Detector
Identify puzzles with multiple valid solutions and provide alternative arrangements when they exist.
Tips for Solving Nonograms
| Strategy | Why It Works |
|---|---|
| Start with rows/columns with largest blocks | Large blocks have fewer possible positions, providing more definite cells to work with. |
| Use cross-point logic for overlapping regions | Where row and column constraints intersect, you can deduce cell states with higher confidence. |
| Apply edge constraints first | Blocks near grid edges have limited placement options, making them easier to determine. |
| Fill definite cells even in partial solutions | Some cells must be filled/empty regardless of other possibilities, providing progress anchors. |
Formats Supported in Nonogram Solver
- Space-Separated Clues: "3 1 2" format for easy reading and input
- Comma-Separated Clues: "3,1,2" format for structured data import
- Multi-line Input: Each row/column clue on separate lines for organization
- Grid Sizes: From 3x3 up to 25x25 for optimal solving performance
- ASCII Output: Text-based grid representation for easy copying and sharing
Examples of Nonogram Solver Use
5x5 Heart Pattern
Row Clues: 1 1, 3, 5, 3, 1 | Column Clues: 1, 3, 5, 3, 1
→ Creates a symmetric heart shape perfect for beginners
10x10 House Pattern
Row Clues: 3, 5, 7, 9, 2 2 2, 1 1 1 1... | Column Clues: 2, 4, 6, 8, 10...
→ Complex architectural pattern with multiple solving techniques required
15x15 Smiley Face
Advanced puzzle with symmetric features and challenging constraint combinations
→ Tests advanced solving strategies and pattern recognition skills
Frequently Asked Questions (FAQs)
What is the best nonogram solver online?
Our free Nonogram Solver offers the most comprehensive solution with visual grid rendering, step-by-step explanations, symmetry detection, and support for puzzles up to 25x25. It's completely free with no registration required.
How do I input clues into a nonogram solver?
Enter clues as numbers separated by spaces (e.g., "3 1 2") with each row/column on a separate line. The numbers represent consecutive filled blocks, with gaps between them automatically calculated.
Can a nonogram solver show step-by-step logic?
Yes! Enable "Show solving steps" in advanced settings to see detailed explanations of each solving decision, including constraint applications and logical deductions.
Is there a solver for large nonogram puzzles?
Our solver handles puzzles up to 25x25 efficiently. For larger puzzles, the solving time increases, but the algorithm remains effective for most standard nonogram sizes.
What are common mistakes when using a nonogram solver?
Common mistakes include mismatched clue counts (wrong number of row/column clues), incorrect clue format, and entering impossible clue combinations that exceed grid dimensions.
How accurate is an AI nonogram solver?
Our solver uses proven constraint satisfaction algorithms with near-100% accuracy for well-formed puzzles. It can detect impossible puzzles and provide partial solutions when complete solving isn't possible.
What do I do if my nonogram has no solution?
If the solver reports no solution, check your clues for errors. Verify that row and column clue counts match grid dimensions and that individual clues don't exceed line lengths.
Can I download the solved nonogram grid?
Yes! You can copy the ASCII representation of the solved grid or download it as a PNG image (when available) for sharing or printing.
Whether you're a nonogram enthusiast stuck on a challenging puzzle, an educator teaching logical reasoning, or a puzzle creator verifying your designs, our free Nonogram Solver provides the intelligence and visual clarity you need. Experience the satisfaction of seeing complex logic puzzles solved step-by-step!
🧩 Start using the Free Nonogram Solver today and master any picross puzzle!
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