Slitherlink Generator
Creates slitherlink puzzles: draw a single closed loop along the dotted grid lines so that each number tells how many of the four edges around that cell belong to the loop. The loop may never cross or branch. The generator builds a random loop, computes all the numbers, then removes clues while a solver keeps the solution unique. Solve on the page by clicking edges, with checking and hints, print a clean sheet with or without the solution, or export PNG/SVG.
Runs 100% in your browser — your puzzles never leave your device.
Read the full guide to this tool
Notes
- Rules: connect the dots into one closed loop that never crosses or touches itself; a clue number counts the loop edges directly around that cell (0 to 3). Cells without a number are unconstrained.
- Every puzzle is verified with a backtracking solver to have exactly one solution before it is shown.
- Difficulty controls how aggressively clues are removed: easy keeps most numbers, hard strips every clue the solver can prove redundant.
- Runs 100% in your browser — your words and puzzles never leave your device.
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