Is my data private when using Sudoku Solver & Assistant Studio?

Yes, 100%. All processing and transformations run entirely client-side in your web browser using Web APIs and WebAssembly. No data, text, tokens, or files are ever sent to any remote server.

Is Sudoku Solver & Assistant Studio free to use?

Yes, all tools on util.farm are completely free, open, and fast with no account registration, ads, or usage limits.

Sudoku Solver & Assistant Studio

Grid Size:

Generate:

Clues: 0 Ready

Click cell or use arrow keys

Shortcuts: 1-9 Del Arrows

Sudoku Solving Engines

Logical Deduction Explainer Step Mode

Click "Logical Step (Hint)" to find the next human deduction technique (Singles, Pairs, Intersections, X-Wing, Swordfish, etc.) with cell highlights and elimination explanations.

Difficulty & Structure Not Graded

Clues Count

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Uniqueness

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Symmetry

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Highest Technique

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00:00

Mistakes: 0

Switch back to Solver & Studio tab at any point to analyze or step through this puzzle.

Curated Benchmark & Famous Sudoku Presets

Explore historical mathematics milestones, minimal 17-clue puzzles, and multi-size variants.

Import Puzzle (Flexible Formats)

Paste any 81-character string, dots/zeros notation, ASCII grid, or JSON matrix:

Congratulations! Puzzle Solved!

Curated Benchmark & Famous Sudoku Presets

Import Puzzle (Flexible Formats)

Export & Download Board

Standalone Solver Code Generator