Instant Board Scanner - Snap a photo of any Sudoku puzzle and convert it into a clean, playable 9×9 grid using computer vision.
Smart Solver - Get a full solution instantly, powered by a backtracking + constraint-driven algorithm.
Hint Engine - Stuck on a puzzle? Request one or multiple hints, generated from the solved board and applied directly to your grid.
Puzzle Generator - Create fresh Sudoku boards on demand, with guaranteed solvability.
Board Editor - Manually tweak cells, fix mistakes.
Progress Persistence - Your board, hints, and state are saved automatically in local storage.
Error Checking - Optional real-time validation to catch duplicates and impossible moves.
The app is split across two services hosted on Render:
| Service | Runtime | Host |
|---|---|---|
| Sudoku Frontend | Static Site (Vite build) | Global CDN |
| Sudoku Backend | Python / Flask + Gunicorn | Virginia |
The frontend is served as a static site via Render's global CDN. The backend runs as a persistent web service, handling API requests for puzzle generation, solving, hints, and image processing.
SolveSudoku takes zero liability for puzzles you could've solved yourself.
If you're considering contributing to Sudoku, first of all, thank you! Check the Contribution Guidelines before getting started.
Unless specified otherwise, this repository is licensed under AGPL-3.0