Slitherlink Generator
Generate custom Slitherlink (also known as Fences or Loop the Loop) logic puzzles. Customise the grid size, difficulty, reveal solutions, and export as a printable PNG or scalable SVG.
Puzzle Settings
Puzzle Preview
Connect adjacent dots with vertical or horizontal lines to form a single continuous loop. The numbers indicate how many lines surround that specific cell.
Free Online Slitherlink Generator
Create custom Slitherlink (Loop the Loop / Fences) logic puzzles instantly. Choose your difficulty level, customise colours, and export high-quality printable puzzle sheets.
Custom Difficulty Levels
Whether you're a beginner or an expert, scale your puzzle grid size from 5x5 up to 9x9.
Guaranteed Solvable
Every generated Slitherlink grid relies on strict mathematical rules ensuring there is a valid path to complete it.
Custom Design
Change the dot colours, line colours, text styles, and backgrounds to perfectly match your worksheet or project.
Print-Ready Quality
Export as a vector SVG for perfect clarity when printed on a full sheet of paper, or as a PNG for easy online sharing.
Frequently Asked Questions
1. What is Slitherlink?
Slitherlink (also known as Fences, Loop the Loop, or Dotty Dilemma) is a logic puzzle played on a rectangular lattice of dots. The goal is to connect adjacent dots to form a single continuous loop with no crossings or branches.
2. How do the clue numbers work?
The numbers inside the squares indicate how many of its four edges are part of the loop. Blank squares can have any number of edges (from 0 to 3) as part of the loop.
3. How is the difficulty determined?
Difficulty scales the size of the grid (5x5, 7x7, 9x9) and reduces the number of initial clues provided, requiring more advanced logic to deduce the single continuous loop.
4. Can I export the solution?
Yes! Simply toggle the 'Show Solution' button to reveal the connected loop, then use the PNG or SVG export buttons to download the completed version.