Stuck on a puzzle? These tools explain every logical step — from Naked Singles to X-Wings — without just handing you the answer.
The best Sudoku solvers don't just give you the answer — they explain the technique behind each move. Used correctly, a solver is one of the most powerful learning tools available. When you're stuck, instead of guessing, use a hint to see which technique applies and why. Then try to apply that same technique yourself next time.
All sites on this list provide logical explanations, not just filled grids. We ranked them on explanation quality, technique coverage, and ease of use.
The best place to learn Sudoku logic from scratch.
The industry standard for logical step-by-step analysis.
Advanced solver with educational step explanations.
Step-by-step solver to help you learn advanced logic.
Video-based lessons to master your Sudoku game.
Modern, fast, and mobile-friendly solver app.
A powerful multi-grid and variant solver hub.
A developer-focused interactive solving experience.
Collection of handy utilities for Sudoku solving.
Clean and easy to use for any standard grid.
Quickly get the answer to any tricky Sudoku cell.
Browse our full hand-curated directory of 100+ Sudoku sites, apps, and books.